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CN112821436B - An operation control method and system for a flexible interconnection system in a substation area - Google Patents

An operation control method and system for a flexible interconnection system in a substation area Download PDF

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Publication number
CN112821436B
CN112821436B CN202110015459.9A CN202110015459A CN112821436B CN 112821436 B CN112821436 B CN 112821436B CN 202110015459 A CN202110015459 A CN 202110015459A CN 112821436 B CN112821436 B CN 112821436B
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China
Prior art keywords
control
substation
power
mode
substations
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CN202110015459.9A
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Chinese (zh)
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CN112821436A (en
Inventor
刘海涛
邵瑶
徐旖旎
熊雄
季宇
吴鸣
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China Online Shanghai Energy Internet Research Institute Co ltd
State Grid Shanghai Electric Power Co Ltd
State Grid Corp of China SGCC
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China Online Shanghai Energy Internet Research Institute Co ltd
State Grid Shanghai Electric Power Co Ltd
State Grid Corp of China SGCC
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Priority to CN202110015459.9A priority Critical patent/CN112821436B/en
Publication of CN112821436A publication Critical patent/CN112821436A/en
Priority to PCT/CN2021/141375 priority patent/WO2022148258A1/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/008—Circuit arrangements for AC mains or AC distribution networks involving trading of energy or energy transmission rights
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/14—Energy storage units
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

本发明公开了一种用于台区柔性互联系统的运行控制方法及系统，属于配电系统运行控制技术领域。本发明方法包括：对台区柔性互联系统进行分层控制，当台区柔性互联系统处于最优控制层时；根据逻辑运算结果对台区柔性互联系统的运行动作进行实时控制；控制设备层根据外环接收的参考电压及功率指令进行就地侧的响应控制。本发明在实时功率控制上具备先进性，同时在实现同等功能应用前提下，建设成本更低且在高级应用上具备先进性。

The present invention discloses an operation control method and system for a flexible interconnection system in a substation, and belongs to the technical field of operation control of a power distribution system. The method of the present invention comprises: performing hierarchical control on the flexible interconnection system in the substation, when the flexible interconnection system in the substation is in the optimal control layer; performing real-time control on the operation action of the flexible interconnection system in the substation according to the result of logic operation; and the control device layer performs response control on the local side according to the reference voltage and power command received by the outer loop. The present invention is advanced in real-time power control, and at the same time, under the premise of realizing the same functional application, the construction cost is lower and it is advanced in advanced applications.

Description

Operation control method and system for flexible interconnection system of transformer area
Technical Field
The invention relates to the technical field of operation control of power distribution systems, in particular to an operation control method and system for a flexible interconnection system of a transformer area.
Background
The large-scale distributed photovoltaic grid-connected access, distribution and the wide popularization of novel loads represented by electric energy substitution loads such as electric automobiles and electric heating directly influence the electric energy quality and operation control of the existing distribution transformer area, and the large-scale disordered access also causes the problem of insufficient capacity of the distribution transformer area and a power supply circuit, and a large amount of funds are needed to be invested for capacity expansion and extension.
On the other hand, the problem of larger load gap of the areas caused by inconsistent economic structures in the same area is solved by increasing the capacity of the access public transformer gradually along with the promotion of rural electrified engineering construction by government, so that a large number of areas have heavy load risks and cannot be solved by increasing capacity distribution point investment, and areas with lighter load but insufficient capacity also exist in the same area.
Therefore, the plurality of the inter-platform areas in the same area can improve the capacity of load balancing and energy optimization among the inter-platform areas to a certain extent through interconnection and mutual supply, and the pressure of upgrading and reconstruction of the power grid is relieved. At present, methods based on topology reconstruction, switch combination state switching and the like are mostly adopted for inter-station interconnection and inter-supply, but in the process of interconnection and inter-supply by the traditional alternating current mode, due to the characteristics of closed-loop design and open-loop operation of an alternating current power grid, a bus-tie switch between stations is always in a cold standby state when a system normally operates, and the mutual power controllability and the load balancing capability of the bus-tie switch are insufficient to support the requirements of rapid development of both ends of an internal source and a load of the current station.
Disclosure of Invention
In view of the above problems, the present invention provides an operation control method for a flexible interconnection system of a platform area, including:
hierarchical control is carried out on the flexible interconnection system of the platform area;
When the flexible interconnection system of the platform area is positioned at the optimal control layer, a local monitoring master station is used for determining a multi-time-scale optimization instruction of a current control plan of the flexible interconnection system of the platform area according to different time-scale predicted values, and the platform area is controlled to run to a control target according to the multi-time-scale optimization instruction;
When the flexible interconnection system of the platform area is in a unified control layer, a central controller is used for collecting equipment layer state quantity and analog quantity, logic operation is carried out on the state quantity and the analog quantity, a logic operation result is obtained, and the operation action of the flexible interconnection system of the platform area is controlled in real time according to the logic operation result;
when the flexible interconnection system of the platform area is positioned at the local control layer, the control equipment layer performs response control on the local side according to the reference voltage and the power command received by the outer ring.
Optionally, the control target includes at least one of: the average load, peak clipping and valley filling, VPP and/or power supply reliability among stations meet preset requirements.
Optionally, the running action includes at least one of: the power flow controller starts and stops the action, the cascade coordination action of the power flow controller, the system cooperative action and/or the system operation action.
Optionally, the in-situ side response control includes: selecting a controlled operation mode to perform response control on the ground side according to the arrangement and combination result of the platform area triggering conditions;
wherein different modes of operation map different cooperative control strategies and sequential control logic.
Optionally, the operation mode includes:
An economy running mode, wherein the triggering conditions of the economy running mode are as follows: when the load rate of the platform area is lower than 60%, the battery of the control platform area charges and discharges according to the peak-valley electricity price of the place where the platform area is located, so that the AC/DC and the DC/DC of the platform area operate in a constant power control mode, and the energy storage charging and discharging power is equally divided;
the load balancing operation mode 1 is characterized in that the triggering condition of the load balancing operation mode 1 is as follows: when the load rate of any one of the platform areas is more than 60%, carrying out uniform load by combining energy storage of the rest of the platform areas, carrying out uniform load on the platform areas with the load rate of more than 60%, selecting the AC/DC of any one of the rest of the platform areas as a voltage source to carry out a constant direct current side voltage control mode, selecting the AC/DC and the DC/DC of any one of the rest of the platform areas to operate in a constant power control mode, and operating the AC/DC of the platform areas with the load rate of more than 60% in the constant power control mode;
And a balanced load operation mode 2, wherein the triggering conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, carrying out load balancing on the combined energy storage of the rest transformer areas, controlling the transformer area AC/DC with the load rate less than 60% to serve as a voltage source to operate in a constant direct current side bus voltage control mode, controlling the DC/DC to operate in a constant power control mode, and controlling the rest transformer area AC/DC to operate in the constant power control mode;
the power-losing transfer supply operation mode 1 comprises the following triggering conditions: when one of the station areas is powered off, the remaining station areas are combined with energy storage to supply power to the power-off station area, the AC/DC of any one of the remaining station areas is selected to serve as a voltage source to operate in a constant-DC side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant-power control mode, and the power-off station area AC/DC operates in a VF control mode;
Before power is supplied to the power failure station area in the VF control mode, judging whether to cut off a feeder load according to the moment load rate on the power failure station area;
the power-losing transfer supply operation mode 2 comprises the following triggering conditions:
When any one of the transformer areas is not powered off, the remaining transformer areas are combined with energy storage to supply power to the power-off transformer areas, the AC/DC of the remaining transformer areas is used as a voltage source to operate in a constant-DC bus voltage control mode, the DC/DC is used as a voltage source to operate in a constant-power control mode, and the AC/DC of the power-off transformer areas is used as a VF control mode;
And a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: and when the power of the station areas is lost, the system is stopped.
Optionally, the hierarchical control includes: the system comprises optimal control, unified control and on-site control, wherein the optimal control mapping platform region flexible interconnection system monitors a master station on site, the unified control mapping platform region flexible interconnection system is a central controller, and the on-site control mapping platform region flexible interconnection system is an equipment layer.
The invention also provides an operation control system for the flexible interconnection system of the platform area, which comprises:
the mapping unit is used for carrying out layered control on the flexible interconnection system of the platform area;
the first hierarchical control unit determines that when the flexible interconnection system of the platform region is in an optimal control layer, the control-use on-site monitoring master station determines a multi-time-scale optimization instruction of a current control plan of the flexible interconnection system of the platform region according to different time-scale predicted values, and controls the platform region to operate to a control target according to the multi-time-scale optimization instruction;
The second hierarchical control unit is used for determining that when the flexible interconnection system of the platform area is in a unified control layer, a central controller is controlled to acquire equipment layer state quantity and analog quantity, logic operation is carried out on the state quantity and the analog quantity, a logic operation result is obtained, and the operation action of the flexible interconnection system of the platform area is controlled in real time according to the logic operation result;
And the third hierarchical control unit is used for determining that when the flexible interconnection system of the area is positioned at the local control layer, the control equipment layer is used for carrying out response control on the local side according to the reference voltage and the power command received by the outer ring.
Optionally, the control target of the first hierarchical control unit includes at least one of: the average load, peak clipping and valley filling, VPP and/or power supply reliability among stations meet preset requirements.
Optionally, the second hierarchical control unit operation action includes at least one of: the power flow controller starts and stops the action, the cascade coordination action of the power flow controller, the system cooperative action and/or the system operation action.
Optionally, the in-situ side response control of the third hierarchical control unit includes: selecting a controlled operation mode to perform response control on the ground side according to the arrangement and combination result of the platform area triggering conditions;
wherein different modes of operation map different cooperative control strategies and sequential control logic.
Optionally, the operation mode includes:
An economy running mode, wherein the triggering conditions of the economy running mode are as follows: when the load rate of the platform area is lower than 60%, the battery of the control platform area charges and discharges according to the peak-valley electricity price of the place where the platform area is located, so that the AC/DC and the DC/DC of the platform area operate in a constant power control mode, and the energy storage charging and discharging power is equally divided;
the load balancing operation mode 1 is characterized in that the triggering condition of the load balancing operation mode 1 is as follows: when the load rate of any one of the platform areas is more than 60%, carrying out uniform load by combining energy storage of the rest of the platform areas, carrying out uniform load on the platform areas with the load rate of more than 60%, selecting the AC/DC of any one of the rest of the platform areas as a voltage source to carry out a constant direct current side voltage control mode, selecting the AC/DC and the DC/DC of any one of the rest of the platform areas to operate in a constant power control mode, and operating the AC/DC of the platform areas with the load rate of more than 60% in the constant power control mode;
And a balanced load operation mode 2, wherein the triggering conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, carrying out load balancing on the combined energy storage of the rest transformer areas, controlling the transformer area AC/DC with the load rate less than 60% to serve as a voltage source to operate in a constant direct current side bus voltage control mode, controlling the DC/DC to operate in a constant power control mode, and controlling the rest transformer area AC/DC to operate in the constant power control mode;
the power-losing transfer supply operation mode 1 comprises the following triggering conditions: when one of the station areas is powered off, the remaining station areas are combined with energy storage to supply power to the power-off station area, the AC/DC of any one of the remaining station areas is selected to serve as a voltage source to operate in a constant-DC side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant-power control mode, and the power-off station area AC/DC operates in a VF control mode;
Before power is supplied to the power failure station area in the VF control mode, judging whether to cut off a feeder load according to the moment load rate on the power failure station area;
the power-losing transfer supply operation mode 2 comprises the following triggering conditions:
When any one of the transformer areas is not powered off, the remaining transformer areas are combined with energy storage to supply power to the power-off transformer areas, the AC/DC of the remaining transformer areas is used as a voltage source to operate in a constant-DC bus voltage control mode, the DC/DC is used as a voltage source to operate in a constant-power control mode, and the AC/DC of the power-off transformer areas is used as a VF control mode;
And a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: and when the power of the station areas is lost, the system is stopped.
Optionally, the hierarchical control of the mapping unit includes: the system comprises optimal control, unified control and on-site control, wherein the optimal control mapping platform region flexible interconnection system monitors a master station on site, the unified control mapping platform region flexible interconnection system is a central controller, and the on-site control mapping platform region flexible interconnection system is an equipment layer.
The invention has advancement in real-time power control, and has lower construction cost and advancement in advanced application on the premise of realizing the application of the same function.
Drawings
FIG. 1 is a flow chart of a method of operation control for a flexible interconnection system of a bay in accordance with the present invention;
FIG. 2 is a geographic diagram of an embodiment of a method of operation control for a flexible interconnection system of a cell in accordance with the present invention;
FIG. 3 is a system diagram of an embodiment of an operation control method for a flexible interconnection system of a bay in accordance with the present invention;
Fig. 4 is a block diagram of an operation control system for a flexible interconnection system of a bay according to the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The invention provides an operation control method for a flexible interconnection system of a platform area, which is shown in figure 1 and comprises the following steps:
Performing hierarchical control on the flexible interconnection system of the platform area, wherein the hierarchical control comprises the following steps: the system comprises an optimal control, unified control and on-site control, wherein the optimal control maps a master station of an on-site monitoring system of the flexible interconnection system of the area, the unified control maps a central controller of the flexible interconnection system of the area, and the on-site control maps an equipment layer of the flexible interconnection system of the area;
When the flexible interconnection system of the platform area is positioned at the optimal control layer, a local monitoring master station is used for determining a multi-time-scale optimization instruction of a current control plan of the flexible interconnection system of the platform area according to different time-scale predicted values, and the platform area is controlled to run to a control target according to the multi-time-scale optimization instruction;
When the flexible interconnection system of the platform area is in a unified control layer, a central controller is used for collecting equipment layer state quantity and analog quantity, logic operation is carried out on the state quantity and the analog quantity, a logic operation result is obtained, and the operation action of the flexible interconnection system of the platform area is controlled in real time according to the logic operation result;
when the flexible interconnection system of the platform area is positioned at the local control layer, the control equipment layer performs response control on the local side according to the reference voltage and the power command received by the outer ring.
Wherein the control target includes: the average load, peak clipping and valley filling, VPP and/or power supply reliability among stations meet preset requirements.
Wherein the running action comprises: the power flow controller starts and stops the action, the cascade coordination action of the power flow controller, the system cooperative action and/or the system operation action.
Wherein the response control of the local side comprises: selecting a controlled operation mode to perform response control on the ground side according to the arrangement and combination result of the platform area triggering conditions;
wherein different modes of operation map different cooperative control strategies and sequential control logic.
Wherein the operation mode includes:
An economy running mode, wherein the triggering conditions of the economy running mode are as follows: when the load rate of the platform area is lower than 60%, the battery of the control platform area charges and discharges according to the peak-valley electricity price of the place where the platform area is located, so that the AC/DC and the DC/DC of the platform area operate in a constant power control mode, and the energy storage charging and discharging power is equally divided;
the load balancing operation mode 1 is characterized in that the triggering condition of the load balancing operation mode 1 is as follows: when the load rate of any one of the platform areas is more than 60%, carrying out uniform load by combining energy storage of the rest of the platform areas, carrying out uniform load on the platform areas with the load rate of more than 60%, selecting the AC/DC of any one of the rest of the platform areas as a voltage source to carry out a constant direct current side voltage control mode, selecting the AC/DC and the DC/DC of any one of the rest of the platform areas to operate in a constant power control mode, and operating the AC/DC of the platform areas with the load rate of more than 60% in the constant power control mode;
And a balanced load operation mode 2, wherein the triggering conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, carrying out load balancing on the combined energy storage of the rest transformer areas, controlling the transformer area AC/DC with the load rate less than 60% to serve as a voltage source to operate in a constant direct current side bus voltage control mode, controlling the DC/DC to operate in a constant power control mode, and controlling the rest transformer area AC/DC to operate in the constant power control mode;
the power-losing transfer supply operation mode 1 comprises the following triggering conditions: when one of the station areas is powered off, the remaining station areas are combined with energy storage to supply power to the power-off station area, the AC/DC of any one of the remaining station areas is selected to serve as a voltage source to operate in a constant-DC side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant-power control mode, and the power-off station area AC/DC operates in a VF control mode;
before power is supplied to the power failure station area in the VF control mode, judging whether to cut off a feeder load according to the load rate of the power failure station area at the moment;
the power-losing transfer supply operation mode 2 comprises the following triggering conditions:
When any one of the transformer areas is not powered off, the remaining transformer areas are combined with energy storage to supply power to the power-off transformer areas, the AC/DC of the remaining transformer areas is used as a voltage source to operate in a constant-DC bus voltage control mode, the DC/DC is used as a voltage source to operate in a constant-power control mode, and the AC/DC of the power-off transformer areas is used as a VF control mode;
And a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: and when the power of the station areas is lost, the system is stopped.
The invention is further illustrated by the following examples:
The following description is made by using a Ningbo North-Loose village distribution transformer area system, and the geographic diagram is shown in fig. 2, wherein the geographic diagram is that the No.1 area is accessed to 20 more users (average load rate 20%), the No. 2 area is accessed to 200 more users (average load rate 54%), and the No. 5 area is accessed to 80 more users (average load rate 20%).
In geographic position, no. 2 district and No. 5 district are about 150 meters apart from, and No. 1 district is about 800 meters apart from two preceding districts, and No. 1, no. 2 and No. 5 change to the post and change, switch, concentrator, change terminal, SVG all integrate into in the JP cabinet.
The station transformer is a 1-path 10kV inlet wire and a 3-path 400V inlet wire, wherein the station transformer 1, the station transformer 2 and the station transformer 5 only use 2 paths of inlet wires, and 1 path of inlet wires are reserved for standby, but only 2 inlet wire holes are reserved on the JP cabinet body;
the 3-channel feeder lines of the 3-channel transformer and the 4-channel transformer are used, the 10kV feeder line is provided with a zero gram switch, the 400V low-voltage main feeder line is provided with a disconnecting link, the outlet side of the 3-channel feeder line is provided with an idle switch, and the information acquisition resolution of the current 5-channel transformer terminals is 15 minutes.
A set of flexible platform region interconnection system is built between the two-lion villages 1,2 and 5 of Ningbo North, as shown in fig. 3, each flexible interconnection container comprises 3 250kW bidirectional DC/AC converters, each converter is embedded with an AC inlet switch, the 3 platforms pass through the respective DC/AC converters and then are collected into a DC switch cabinet to form a wiring mode of a common DC bus, the DC switch cabinet is3 in and 3 out, 1 line of 3 outgoing lines is connected into an energy storage system, the other 2 lines of outgoing lines are connected into a quick charging pile in standby mode, and the respective inlet and outlet switches in the DC switch cabinet are fused with a quick protection function.
The energy storage capacity of the lithium iron phosphate battery is 300kWh, and the lithium iron phosphate battery is connected into a direct current switch cabinet through 200kW bidirectional DC/DC, and is secondarily provided with 1 central controller and 1 set of on-site monitoring master station for monitoring and controlling the running state of the interconnected system of the transformer area in real time, and simultaneously, optimizing scheduling instructions are appointed for the interconnected system based on prediction data. Meanwhile, a plurality of auxiliary devices such as rapid protection, metering, direct current screens, cables and the like are configured, so that the normal operation of the flexible interconnection container system is ensured.
The flexible interconnect container is in secondary communication with the interior:
1) The central controller is respectively communicated with K11, K12, K13, K14, K21, K22, K23, K24, K51, K52, K53 and K54 in the 3 JP cabinets in a mode of converting RS-485 into optical fiber to RS-485, so that three remote functions of remote signaling, remote measurement and remote control are realized;
2) The central controller is communicated with 3 DC/ACs respectively in an RS-485 mode to acquire the state quantity and analog quantity of the converter, and simultaneously, the control mode and start-stop of the converter are remotely controlled, and the output power of the converter is remotely measured to realize a four-remote function;
3) The central controller communicates with the direct current switch cabinet in an RS-485 mode to acquire the state quantity of the direct current side-in and wire-out switch, and simultaneously, the central controller remotely controls the state quantity of the direct current side-in and wire-out switch to realize a two-remote function;
4) The central controller communicates with the local monitoring master station in an Ethernet mode, on one hand, the local monitoring master station obtains real-time operation information of the platform area interconnection system from the central controller, on the other hand, the central controller receives optimization instructions of different time scales of the local master station, and after verification, each terminal device is issued;
5) And the central controller uploads partial data of the flexible interconnection system of the part station area to the main station of the IV area in a wireless mode after chip hard encryption and I-type network management soft encryption.
The invention also provides an operation control system 200 for the flexible interconnection system of the platform area, as shown in fig. 4, comprising:
A mapping unit 201 performs hierarchical control on the flexible interconnection system of the area, where the hierarchical control includes: the system comprises an optimal control, unified control and on-site control, wherein the optimal control maps a master station of an on-site monitoring system of the flexible interconnection system of the area, the unified control maps a central controller of the flexible interconnection system of the area, and the on-site control maps an equipment layer of the flexible interconnection system of the area;
The first hierarchical control unit 202 determines that when the flexible interconnection system of the platform area is in an optimal control layer, the control-use local monitoring master station determines a multi-time-scale optimization instruction of a current control plan of the flexible interconnection system of the platform area according to different time-scale predicted values, and controls the platform area to operate to a control target according to the multi-time-scale optimization instruction;
The second hierarchical control unit 203 determines that when the flexible interconnection system of the platform area is in a unified control layer, a central controller is controlled to collect equipment layer state quantity and analog quantity, logic operation is performed on the state quantity and analog quantity, a logic operation result is obtained, and the operation action of the flexible interconnection system of the platform area is controlled in real time according to the logic operation result;
The third hierarchical control unit 204 determines that when the flexible interconnection system of the area is in the local control layer, the control device layer is used to perform response control on the local side according to the reference voltage and the power command received by the outer ring.
Wherein the control target includes: the average load, peak clipping and valley filling, VPP and/or power supply reliability among stations meet preset requirements.
Wherein the running action comprises: the power flow controller starts and stops the action, the cascade coordination action of the power flow controller, the system cooperative action and/or the system operation action.
Wherein the response control of the local side comprises: selecting a controlled operation mode to perform response control on the ground side according to the arrangement and combination result of the platform area triggering conditions;
wherein different modes of operation map different cooperative control strategies and sequential control logic.
Wherein the operation mode includes:
An economy running mode, wherein the triggering conditions of the economy running mode are as follows: when the load rate of the platform area is lower than 60%, the battery of the control platform area charges and discharges according to the peak-valley electricity price of the place where the platform area is located, so that the AC/DC and the DC/DC of the platform area operate in a constant power control mode, and the energy storage charging and discharging power is equally divided;
the load balancing operation mode 1 is characterized in that the triggering condition of the load balancing operation mode 1 is as follows: when the load rate of any one of the platform areas is more than 60%, carrying out uniform load by combining energy storage of the rest of the platform areas, carrying out uniform load on the platform areas with the load rate of more than 60%, selecting the AC/DC of any one of the rest of the platform areas as a voltage source to carry out a constant direct current side voltage control mode, selecting the AC/DC and the DC/DC of any one of the rest of the platform areas to operate in a constant power control mode, and operating the AC/DC of the platform areas with the load rate of more than 60% in the constant power control mode;
And a balanced load operation mode 2, wherein the triggering conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, carrying out load balancing on the combined energy storage of the rest transformer areas, controlling the transformer area AC/DC with the load rate less than 60% to serve as a voltage source to operate in a constant direct current side bus voltage control mode, controlling the DC/DC to operate in a constant power control mode, and controlling the rest transformer area AC/DC to operate in the constant power control mode;
the power-losing transfer supply operation mode 1 comprises the following triggering conditions: when one of the station areas is powered off, the remaining station areas are combined with energy storage to supply power to the power-off station area, the AC/DC of any one of the remaining station areas is selected to serve as a voltage source to operate in a constant-DC side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant-power control mode, and the power-off station area AC/DC operates in a VF control mode;
Before power is supplied to the power failure station area in the VF control mode, judging whether to cut off a feeder load according to the moment load rate on the power failure station area;
the power-losing transfer supply operation mode 2 comprises the following triggering conditions:
When any one of the transformer areas is not powered off, the remaining transformer areas are combined with energy storage to supply power to the power-off transformer areas, the AC/DC of the remaining transformer areas is used as a voltage source to operate in a constant-DC bus voltage control mode, the DC/DC is used as a voltage source to operate in a constant-power control mode, and the AC/DC of the power-off transformer areas is used as a VF control mode;
And a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: and when the power of the station areas is lost, the system is stopped.
The invention has advancement in real-time power control, and has lower construction cost and advancement in advanced application on the premise of realizing the application of the same function.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be realized by adopting various computer languages, such as object-oriented programming language Java, an transliteration script language JavaScript and the like.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (8)

1.一种用于台区柔性互联系统的运行控制方法，所述方法包括：1. An operation control method for a flexible interconnection system in a substation, the method comprising: 对台区柔性互联系统进行分层控制Hierarchical control of flexible interconnection system in substations 当台区柔性互联系统处于最优控制层时，使用就地监控主站根据不同时间尺度预测值确定台区柔性互联系统当前控制计划的多时间尺度优化指令，根据多时间尺度优化指令控制台区运行至控制目标；When the flexible interconnection system of the substation is in the optimal control layer, the local monitoring master station is used to determine the multi-time scale optimization instructions of the current control plan of the flexible interconnection system of the substation according to the prediction values of different time scales, and the substation is controlled to run to the control target according to the multi-time scale optimization instructions; 当台区柔性互联系统处于统一控制层时，使用中央控制器采集设备层状态量与模拟量，对状态量及模拟量进行逻辑运算，获取逻辑运算结果，根据逻辑运算结果对台区柔性互联系统的运行动作进行实时控制；When the flexible interconnection system of the substation is in a unified control layer, the central controller is used to collect the state quantity and analog quantity of the equipment layer, perform logical operations on the state quantity and analog quantity, obtain the logical operation results, and perform real-time control on the operation of the flexible interconnection system of the substation according to the logical operation results; 当台区柔性互联系统处于就地控制层时，控制设备层根据外环接收的参考电压及功率指令进行就地侧的响应控制；When the flexible interconnection system of the substation is in the local control layer, the control device layer performs response control on the local side according to the reference voltage and power instructions received by the outer loop; 所述就地侧的响应控制，包括：根据台区触发条件的排列组合结果，选择控制的运行模式进行地侧的响应控制；The local response control includes: selecting a control operation mode to perform local response control according to the permutation and combination results of the station area trigger conditions; 其中，不同的运行模式映射不同的协同控制策略和顺序控制逻辑；Among them, different operation modes map different collaborative control strategies and sequential control logics; 所述运行模式，包括：The operation mode includes: 经济运行模式，所述经济运行模式的触发条件为：当台区负载率均低于60％时，控制台区电池根据台区所在地的峰谷电价进行充放电，使台区的AC/DC及DC/DC运行在定功率控制模式，均分储能充放电功率；Economic operation mode: The triggering condition of the economic operation mode is: when the load rate of each substation is lower than 60%, the battery in the control area is charged and discharged according to the peak and valley electricity price of the substation, so that the AC/DC and DC/DC of the substation operate in a constant power control mode, and the energy storage charging and discharging power is evenly distributed; 均衡负载运行模式1，所述均衡负载运行模式1的触发条件为：当台区中任意一个台区负载率大于60％时，且剩余的台区联合储能进行均载，对负载率大于60％的台区进行均载，选取剩余的台区中任意一个台区的AC/DC作为电压源进行定直流侧电压控制模式，选取剩余的台区中任意一个台区的AC/DC以及DC/DC运行在定功率控制模式，负载率大于60％的台区AC/DC运行在定功率控制模式；Balanced load operation mode 1, the triggering condition of the balanced load operation mode 1 is: when the load rate of any one of the substations is greater than 60%, and the remaining substations are combined with energy storage for load balancing, the substations with a load rate greater than 60% are loaded evenly, and the AC/DC of any one of the remaining substations is selected as the voltage source to perform a fixed DC side voltage control mode, and the AC/DC and DC/DC of any one of the remaining substations are selected to operate in a constant power control mode, and the AC/DC of the substation with a load rate greater than 60% operates in a constant power control mode; 均衡负载运行模式2，所述均衡负载运行模式2的触发条件为：当台区中任意一个台区负载率小于60％时，且对剩余的台区联合储能进行均载，控制负载率小于60％的台区AC/DC作为电压源运行在定直流侧母线电压控制模式，DC/DC运行在定功率控制模式，剩余台区AC/DC运行在定功率控制模式；Balanced load operation mode 2, the triggering condition of the balanced load operation mode 2 is: when the load rate of any one of the substations is less than 60%, and the remaining substations are combined with energy storage for load balancing, the substation AC/DC with a load rate less than 60% is controlled as a voltage source to operate in a fixed DC side bus voltage control mode, the DC/DC operates in a fixed power control mode, and the remaining substation AC/DC operates in a fixed power control mode; 失电转供运行模式1，所述失电转供运行模式1的触发条件为：当台区中某一个台区失电时，剩余台区联合储能对失电台区进行供电，选取剩余台区中的任意一个台区的AC/DC作为电压源运行在定直流侧母线电压控制模式，DC/DC及另一个AC/DC运行在定功率控制模式，失电台区AC/DC运行在VF控制模式；Power failure transfer operation mode 1, the triggering condition of the power failure transfer operation mode 1 is: when a certain substation in the substation loses power, the remaining substations jointly with the energy storage supply power to the lost substation, and the AC/DC of any one of the remaining substations is selected as the voltage source to operate in the fixed DC side bus voltage control mode, the DC/DC and another AC/DC operate in the fixed power control mode, and the AC/DC in the lost substation operates in the VF control mode; 所述VF控制模式下在对失电台区进行供电前，根据失电台区上一时刻负载率判断是否切除一条馈线负荷；In the VF control mode, before supplying power to the lost station area, it is determined whether to cut off a feeder load according to the load rate of the lost station area at the last moment; 失电转供运行模式2，所述失电转供运行模式2的触发条件为：Power failure transfer operation mode 2, the triggering conditions of the power failure transfer operation mode 2 are: 当台区中任意一个台区未失电，剩余台区联合储能对失电台区进行供电，剩余台区的AC/DC作为电压源运行在定直流母线电压控制模式，储DC/DC运行在定功率控制模式，失电台区AC/DC运行在VF控制模式；When any of the substations in the substation area is not out of power, the remaining substations will work with the energy storage to supply power to the out-of-power substation. The AC/DC in the remaining substations will operate in the constant DC bus voltage control mode as a voltage source, the energy storage DC/DC will operate in the constant power control mode, and the AC/DC in the out-of-power substation will operate in the VF control mode. 停机模式，所述停机模式的触发条件为：台区均失电时，系统停机。Shutdown mode: the triggering condition of the shutdown mode is: when all substations lose power, the system shuts down. 2.根据权利要求1所述的方法，所述控制目标包括如下至少一种：台区间均载、削峰填谷、VPP和/或供电可靠性满足预设要求。2. According to the method of claim 1, the control target includes at least one of the following: load balancing between substations, peak shaving and valley filling, VPP and/or power supply reliability meeting preset requirements. 3.根据权利要求1所述的方法，所述运行动作包括如下至少一种：潮流控制器启停动作、潮流控制器级联协调动作、系统协同动作和/或系统运行动作。3. According to the method of claim 1, the operating action includes at least one of the following: a flow controller start-stop action, a flow controller cascade coordination action, a system collaborative action and/or a system operating action. 4.根据权利要求1所述的方法，所述分层控制包括：最优控制、统一控制和就地控制，所述最优控制映射台区柔性互联系统就地监控主站，所述统一控制映射台区柔性互联系统的中央控制器，所述就地控制映射台区柔性互联系统的设备层。4. According to the method described in claim 1, the hierarchical control includes: optimal control, unified control and local control, the optimal control maps the local monitoring main station of the substation flexible interconnection system, the unified control maps the central controller of the substation flexible interconnection system, and the local control maps the equipment layer of the substation flexible interconnection system. 5.一种用于台区柔性互联系统的运行控制系统，所述系统包括：5. An operation control system for a flexible interconnection system in a substation, the system comprising: 映射单元，对台区柔性互联系统进行分层控制；Mapping unit, which performs hierarchical control on the flexible interconnection system of the substation area; 第一分层控制单元，确定当台区柔性互联系统处于最优控制层时，控制使用就地监控主站根据不同时间尺度预测值确定台区柔性互联系统当前控制计划的多时间尺度优化指令，根据多时间尺度优化指令控制台区运行至控制目标；The first hierarchical control unit determines that when the flexible interconnection system of the substation is in the optimal control layer, the control uses the local monitoring master station to determine the multi-time scale optimization instructions of the current control plan of the flexible interconnection system of the substation according to the prediction values of different time scales, and controls the substation to run to the control target according to the multi-time scale optimization instructions; 第二分层控制单元，确定当台区柔性互联系统处于统一控制层时，控制使用中央控制器采集设备层状态量与模拟量，对状态量及模拟量进行逻辑运算，获取逻辑运算结果，根据逻辑运算结果对台区柔性互联系统的运行动作进行实时控制；The second hierarchical control unit determines that when the substation flexible interconnection system is in a unified control layer, the central controller is used to collect the state quantity and analog quantity of the device layer, performs logical operations on the state quantity and analog quantity, obtains the logical operation results, and performs real-time control on the operation of the substation flexible interconnection system according to the logical operation results; 第三分层控制单元，确定当台区柔性互联系统处于就地控制层时，使用控制设备层根据外环接收的参考电压及功率指令进行就地侧的响应控制；The third hierarchical control unit determines that when the flexible interconnection system of the substation area is in the local control layer, the control device layer is used to perform response control on the local side according to the reference voltage and power command received by the outer loop; 所述第三分层控制单元的就地侧的响应控制，根据台区触发条件的排列组合结果，选择控制的运行模式进行地侧的响应控制；The local side response control of the third hierarchical control unit selects the control operation mode to perform the local side response control according to the permutation and combination results of the station area trigger conditions; 不同的运行模式映射不同的协同控制策略和顺序控制逻辑；Different operation modes map different collaborative control strategies and sequential control logics; 所述运行模式，包括：The operation mode includes: 经济运行模式，所述经济运行模式的触发条件为：当台区负载率均低于60％时，控制台区电池根据台区所在地的峰谷电价进行充放电，使台区的AC/DC及DC/DC运行在定功率控制模式，均分储能充放电功率；Economic operation mode: The triggering condition of the economic operation mode is: when the load rate of each substation is lower than 60%, the battery in the control area is charged and discharged according to the peak and valley electricity price of the substation, so that the AC/DC and DC/DC of the substation operate in a constant power control mode, and the energy storage charging and discharging power is evenly distributed; 均衡负载运行模式1，所述均衡负载运行模式1的触发条件为：当台区中任意一个台区负载率大于60％时，且剩余的台区联合储能进行均载，对负载率大于60％的台区进行均载，选取剩余的台区中任意一个台区的AC/DC作为电压源进行定直流侧电压控制模式，选取剩余的台区中任意一个台区的AC/DC以及DC/DC运行在定功率控制模式，负载率大于60％的台区AC/DC运行在定功率控制模式；Balanced load operation mode 1, the triggering condition of the balanced load operation mode 1 is: when the load rate of any one of the substations is greater than 60%, and the remaining substations are combined with energy storage for load balancing, the substations with a load rate greater than 60% are loaded evenly, and the AC/DC of any one of the remaining substations is selected as the voltage source to perform a fixed DC side voltage control mode, and the AC/DC and DC/DC of any one of the remaining substations are selected to operate in a constant power control mode, and the AC/DC of the substation with a load rate greater than 60% operates in a constant power control mode; 均衡负载运行模式2，所述均衡负载运行模式2的触发条件为：当台区中任意一个台区负载率小于60％时，且对剩余的台区联合储能进行均载，控制负载率小于60％的台区AC/DC作为电压源运行在定直流侧母线电压控制模式，DC/DC运行在定功率控制模式，剩余台区AC/DC运行在定功率控制模式；Balanced load operation mode 2, the triggering condition of the balanced load operation mode 2 is: when the load rate of any one of the substations is less than 60%, and the remaining substations are combined with energy storage for load balancing, the substation AC/DC with a load rate less than 60% is controlled as a voltage source to operate in a fixed DC side bus voltage control mode, the DC/DC operates in a fixed power control mode, and the remaining substation AC/DC operates in a fixed power control mode; 失电转供运行模式1，所述失电转供运行模式1的触发条件为：当台区中某一个台区失电时，剩余台区联合储能对失电台区进行供电，选取剩余台区中的任意一个台区的AC/DC作为电压源运行在定直流侧母线电压控制模式，DC/DC及另一个AC/DC运行在定功率控制模式，失电台区AC/DC运行在VF控制模式；Power failure transfer operation mode 1, the triggering condition of the power failure transfer operation mode 1 is: when a certain substation in the substation loses power, the remaining substations jointly with the energy storage supply power to the lost substation, and the AC/DC of any one of the remaining substations is selected as the voltage source to operate in the fixed DC side bus voltage control mode, the DC/DC and another AC/DC operate in the fixed power control mode, and the AC/DC in the lost substation operates in the VF control mode; 所述VF控制模式下在对失电台区进行供电前，根据失电台区上一时刻负载率判断是否切除一条馈线负荷；In the VF control mode, before supplying power to the lost station area, it is determined whether to cut off a feeder load according to the load rate of the lost station area at the last moment; 失电转供运行模式2，所述失电转供运行模式2的触发条件为：Power failure transfer operation mode 2, the triggering conditions of the power failure transfer operation mode 2 are: 当台区中任意一个台区未失电，剩余台区联合储能对失电台区进行供电，剩余台区的AC/DC作为电压源运行在定直流母线电压控制模式，储DC/DC运行在定功率控制模式，失电台区AC/DC运行在VF控制模式；When any of the substations in the substation area is not out of power, the remaining substations will work with the energy storage to supply power to the out-of-power substation. The AC/DC in the remaining substations will operate in the constant DC bus voltage control mode as a voltage source, the energy storage DC/DC will operate in the constant power control mode, and the AC/DC in the out-of-power substation will operate in the VF control mode. 停机模式，所述停机模式的触发条件为：台区均失电时，系统停机。Shutdown mode: the triggering condition of the shutdown mode is: when all substations lose power, the system shuts down. 6.根据权利要求5所述的系统，所述第一分层控制单元的控制目标包括如下至少一种：台区间均载、削峰填谷、VPP和/或供电可靠性满足预设要求。6. According to the system of claim 5, the control target of the first hierarchical control unit includes at least one of the following: load balancing between substations, peak shaving and valley filling, VPP and/or power supply reliability meeting preset requirements. 7.根据权利要求5所述的系统，所述第二分层控制单元运行动作包括如下至少一种：潮流控制器启停动作、潮流控制器级联协调动作、系统协同动作和/或系统运行动作。7. According to the system of claim 5, the operating action of the second hierarchical control unit includes at least one of the following: a flow controller start-stop action, a flow controller cascade coordination action, a system collaborative action and/or a system operation action. 8.根据权利要求5所述的系统，所述映射单元的分层控制包括：最优控制、统一控制和就地控制，所述最优控制映射台区柔性互联系统就地监控主站，所述统一控制映射台区柔性互联系统的中央控制器，所述就地控制映射台区柔性互联系统的设备层。8. According to the system of claim 5, the hierarchical control of the mapping unit includes: optimal control, unified control and local control, the optimal control mapping station flexible interconnection system on-site monitoring main station, the unified control mapping station flexible interconnection system central controller, the local control mapping station flexible interconnection system equipment layer.
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