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CN102170123B - Valve-based control device timing method for modular multilevel flexible direct current transmission system - Google Patents

Valve-based control device timing method for modular multilevel flexible direct current transmission system Download PDF

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CN102170123B
CN102170123B CN201110062888.8A CN201110062888A CN102170123B CN 102170123 B CN102170123 B CN 102170123B CN 201110062888 A CN201110062888 A CN 201110062888A CN 102170123 B CN102170123 B CN 102170123B
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valve base
base control
control device
bridge arm
valve
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CN102170123A (en
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王韧秋
汤广福
杨岳峰
高阳
张新刚
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China Electric Power Research Institute Co Ltd CEPRI
State Grid Corp of China SGCC
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China Electric Power Research Institute Co Ltd CEPRI
State Grid Corp of China SGCC
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    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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    • Y02B90/20—Smart grids as enabling technology in buildings sector

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Abstract

The present invention relates to a valve base control equipment sequential method of a modularization multilevel flexible DC transmission system. The method is a sequential logic operation method for modulation function, current balance control function, capacitance voltage balance control function, valve protection function, communication management function, bridge leg over-current protection function, and valve base control equipment self-check function possessed by the valve base control equipment of the modularization multilevel flexible DC transmission system. With the scheme provided in the invention, the control period is shortened to 100us and the whole control is delayed by less than 200us, thus the high real-time demand of the modularization multilevel flexible DC transmission system is fulfilled. Moreover, the method is proved to be stable and reliable in sequential cooperation by actual running tests.

Description

The valve base control appliance timing method of modular multilevel flexible DC power transmission system
Technical field
The present invention relates to the timing method of modular multilevel flexible DC power transmission system, specifically relate to the valve base control appliance timing method of modular multilevel flexible DC power transmission system.
background technology
Valve base electronic device in conventional DC transmission system generally only possesses valve protection function, telecommunication management function, self-checking function.And the valve base control appliance of modular multilevel formula flexible DC power transmission system also needs to possess modulation function, current balance type control function, balance of voltage control function.
Converter valve triggering mode in conventional DC transmission system is generally all converter valve entirety on brachium pontis and triggers simultaneously, and for valve base control appliance, the trigger command frequency of this kind of triggering mode is lower, and during to valve base electronic device, sequence task disposal ability is less demanding.And in modular multilevel formula flexible DC power transmission system, due to system self character, on brachium pontis, each converter valve submodule, at synchronization, needs to trigger separately or turn-off.For valve base control appliance, at one time in scope, need the control command of the triggering and the shutoff that produce decades of times, thereby the valve base control appliance in modular multilevel formula flexible DC power transmission system needs the time sequence task disposal ability of more high-precision multilevel device, the requirement with raising system to the high real-time of controlling.
Due to the increase of the valve base control appliance function in modular multilevel formula flexible DC power transmission system, and the interior increase of controlling command number amount of same time range, the communication load of valve base control appliance entirety is strengthened, and the timing management Capability Requirement of the communication to valve base control appliance is stricter.
summary of the invention
The sequential logic operation method that the object of this invention is to provide quick multilevel device parallel task processing in modular multilevel formula flexible DC power transmission system, meets the requirement of the high time performance of modular multilevel formula flexible DC power transmission system.
The object of the invention is to adopt following technical proposals to realize:
Modular multilevel flexible DC power transmission system valve base control appliance timing method, its improvements are, described method comprises the steps:
A, valve base control appliance 0 upgrade system control command and bridge arm voltage reference value, upgrade the brachium pontis magnitude of current and upgrade storage capacitor voltage;
B, described valve base control appliance 0 detect brachium pontis electric current, judge whether overcurrent of brachium pontis;
C, described valve base control appliance 0 are revised bridge arm voltage reference value;
D, described valve base control appliance 0 are carried out modulation operation, produce the order of brachium pontis submodule input quantity;
E, described valve base control appliance 0 send brachium pontis control command information, current state information and request signal; Meanwhile, valve base control appliance 1-6 receives the brachium pontis control command information that described valve base control appliance 0 sends; After 8us, described valve base control appliance 0 enters self check state;
F, described valve base control appliance 1-6 carry out the computing of the storage capacitor balance of voltage, and order is moved back in the throwing that produces brachium pontis submodule;
G, described valve base control appliance 1-6 send to throw to brachium pontis submodule and move back command information, and meanwhile, described brachium pontis submodule receives the throwing of described valve base control appliance 1-6 transmission and moves back order, and described brachium pontis submodule is carried out to throw and moved back order and return to current state information; Described valve base control appliance 1-6 receives the return data of described brachium pontis submodule after 20us;
H, described valve base control appliance 1-6 detect brachium pontis submodule return state information, carry out the judgement of valve fault;
I, described valve base control appliance 1-6 send current storage capacitor voltage and brachium pontis submodule state information, and after 8us, described valve base control appliance 1-6 enters self check state.
The preferred technical scheme of one provided by the invention is: in described steps A, in each control cycle starting point, described valve base control appliance 0 reads the communication buffer with upper strata automation equipment, upgrades system control command and bridge arm voltage reference value; Described valve base control appliance 0 reads the communication buffer with brachium pontis current transformer, upgrades the brachium pontis magnitude of current; Described valve base control appliance 0 reads the communication buffer with valve base control appliance 1-6, upgrades storage capacitor voltage.
The provided by the invention second preferred technical scheme is: in described step e, described valve base control appliance 0 sends brachium pontis control command information to valve base control appliance 1-6; Described valve base control appliance 0 sends current state information and request signal to upper strata automation equipment; After 8us, described valve base control appliance 0 enters self check state; Described valve base control appliance 0 sends brachium pontis control command information to valve base control appliance 1-6, and meanwhile, valve base control appliance 1-6 receives the brachium pontis control command information that described valve base control appliance 0 sends; The brachium pontis control command information moment that described valve base control appliance 1-6 sends take reception valve base control appliance 0 is as valve base control appliance 1-6 work period starting point.
The provided by the invention the 3rd preferred technical scheme is: in described step G, described valve base control appliance 1-6 sends to throw to brachium pontis submodule and moves back command information in the time of 48us; Simultaneously described brachium pontis submodule receives the throwing of valve base control appliance 1-6 transmission and moves back order, and described brachium pontis submodule is carried out to throw and moved back order and send current state information to described valve base control appliance 1-6; Described brachium pontis submodule moves back the starting point of order as the work period using the throwing that receives valve base control appliance 1-6 transmission.
The provided by the invention the 4th preferred technical scheme is: described modular multilevel flexible DC power transmission system comprises upper strata automation equipment, 7 valve base control appliances, measuring system and brachium pontis submodules; Described 7 valve base control appliances comprise valve base control appliance 0-6; Described valve base control appliance 0 is connected with upper strata automation equipment and measuring system respectively; Described valve base control appliance 0 is connected with valve base control appliance 1-6; Described valve base control appliance 1-6 is connected with brachium pontis submodule.
The provided by the invention the 5th preferred technical scheme is: described brachium pontis submodule comprises insulated gate bipolar translator power tube IGBT1 and IGBT2, thyristor, storage capacitor and vacuum switch; Described vacuum switch, thyristor V and IGBT2 are in parallel successively; The emitter that described IGBT1 is up-down structure and IGBT1 with IGBT2 is connected the collector electrode of IGBT2; Described IGBT1 and storage capacitor C series connection.
Compared with prior art, the beneficial effect that the present invention reaches is:
The present invention is directed to the modulation function that in modular multilevel formula flexible DC power transmission system, valve base control appliance possesses, current balance type control function, capacitance voltage balance control function, valve protection function, telecommunication management function, brachium pontis overcurrent protection function and valve base control appliance self-checking function, the sequential logic operation method of the quick multilevel device parallel task processing in a kind of modular multilevel formula flexible DC power transmission system is provided, control cycle shortens to 100us, entirety is controlled time delay < 200us, meet the requirement of the high time performance of modular multilevel formula flexible DC power transmission system, and this method coordinates reliable and stable through actual motion test sequence.
Accompanying drawing explanation
Fig. 1 is the valve base control appliance structure chart of modular multilevel formula flexible DC power transmission system;
Fig. 2 is that the valve base control appliance parallel task of modular multilevel formula flexible DC power transmission system is processed sequential chart;
Fig. 3 is the schematic diagram of brachium pontis submodule.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is the valve base control appliance structure chart of modular multilevel formula flexible DC power transmission system, and this system comprises upper strata automation equipment, 7 valve base control appliances, measuring system, several brachium pontis submodules; 7 valve base control appliances comprise valve base control appliance 0-6, valve base control appliance 0 is connected with upper strata automation equipment and measuring system respectively, valve base control appliance 0 is connected with valve base control appliance 1-6, controls valve base control appliance 1-6, and valve base control appliance 1-6 is connected with brachium pontis submodule; Brachium pontis submodule comprises insulated gate bipolar translator power tube IGBT1 and IGBT2, thyristor, storage capacitor and vacuum switch; Vacuum switch, thyristor V and IGBT2 are in parallel successively; The emitter that IGBT1 is up-down structure and IGBT1 with IGBT2 is connected the collector electrode of IGBT2; IGBT1 and storage capacitor C series connection.In modular multilevel formula flexible DC power transmission system, the online task of valve base control appliance 0-6 entirety is specific as follows:
(1) modulation: the bridge arm voltage reference value that the upper strata automation equipment of valve base control appliance need to be sent is converted into the order of brachium pontis submodule input quantity according to the submodule storage capacitor voltage take IGBT as core;
(2) current balance type control: carry out current balance type control algorithm, revise brachium pontis submodule input quantity, and then revise bridge arm voltage and suppress upper and lower bridge arm, alternate circulation;
(3) balance of voltage control: according to dropping into number of levels, and the current state of brachium pontis submodule, produce concrete brachium pontis submodule throwing and move back order;
(4) valve protection: according to the state information of submodule return, carry out fault judgement, and process accordingly according to fault level, misoperation does not occur;
(5) brachium pontis overcurrent protection: the distinctive brachium pontis over-current detection of many level of Executive Moduleization formula flexible DC power transmission system and conservation treatment logic, realize brachium pontis overcurrent protection function;
(6) telecommunication management: realize content addressable procotol (Content Addressable Network with upper strata automation equipment, CAN), High level data link control (High-Level Data Link Control, HDLC) and the communication of other light pulse forms, realize serial communication with brachium pontis submodule.
Above online task by 7 independently valve base control appliance complete, Fig. 2 is that the valve base control appliance parallel task of modular multilevel formula flexible DC power transmission system is processed sequential chart, it is as follows that specific tasks are processed sequential:
(1) each control cycle starting point,, in the time of 0us, valve base control appliance 0 reads the communication buffer with upper strata automation equipment, upgrades system control command and bridge arm voltage reference value; Read and the communication buffer of brachium pontis current transformer, upgrade the brachium pontis magnitude of current; Read and the communication buffer of valve base control appliance 1-6, upgrade storage capacitor voltage;
(2) valve base control appliance 0 detects brachium pontis electric current in the time of 8us, judges whether overcurrent of brachium pontis electric current;
(3) valve base control appliance 0 carries out current balance type computing in the time of 18us, revises bridge arm voltage reference value;
(4) valve base control appliance 0 is carried out modulation operation in the time of 38us, produces the concrete input quantity order of brachium pontis submodule;
(5) valve base control appliance 0 sends brachium pontis control command information to valve base control appliance 1-6 in the time of 48us, sends current state information and request signal to upper strata automation equipment, after 8us, in the time of 56us, enters self check state;
(6) valve base control appliance 0 sends brachium pontis control command information to valve base control appliance 1-6 in the time of 48us, valve base control appliance 1-6 receives the brachium pontis control command information that valve base control appliance 0 sends simultaneously, and the brachium pontis control command information moment that valve base control appliance 1-6 sends take reception valve base control appliance 0 is as valve base control appliance 1-6 work period starting point;
(7) valve base control appliance 1-6 carries out the computing of the storage capacitor balance of voltage in the time of 18us, and order is moved back in the throwing that produces concrete brachium pontis submodule;
(8) valve base control appliance 1-6 sends to throw to brachium pontis submodule and moves back command information in the time of 48us, simultaneously, brachium pontis submodule receives the throwing of valve base control appliance 1-6 transmission and moves back after order, carry out to throw and move back order and send current state information to valve base control appliance 1-6, brachium pontis submodule moves back order as the starting point of work period using the throwing that receives valve base control appliance 1-6 and send, and valve base control appliance 1-6 also receives the return data of brachium pontis submodule after 20us;
(9) valve base control appliance 1-6 detects brachium pontis submodule return state information in the time of 76us, carries out the judgement of valve fault;
(10) valve base control appliance 1-6 sends current storage capacitor voltage and brachium pontis submodule state information to valve base control appliance 0, after 8us, enters self check state.
Finally should be noted that: only illustrate that in conjunction with above-described embodiment technical scheme of the present invention is not intended to limit.Those of ordinary skill in the field are to be understood that: those skilled in the art can modify or be equal to replacement the specific embodiment of the present invention, but among the claim protection range that these modifications or change are all awaited the reply in application.

Claims (4)

1.模块化多电平柔性直流输电系统的阀基控制设备时序方法，其特征在于，所述方法包括下述步骤： 1. A valve-based control device timing method for a modular multi-level flexible direct current transmission system, characterized in that the method comprises the following steps:  A、阀基控制设备0更新系统控制命令及桥臂电压参考值、更新桥臂电流量和更新储能电容电压量； A. The valve base control device 0 updates the system control command and the bridge arm voltage reference value, updates the bridge arm current, and updates the energy storage capacitor voltage; B、所述阀基控制设备0检测所述桥臂电流，判断所述桥臂是否过流； B. The valve base control device 0 detects the current of the bridge arm to determine whether the bridge arm is over-current; C、所述阀基控制设备0修正所述桥臂电压参考值； C. The valve base control device O corrects the bridge arm voltage reference value; D、所述阀基控制设备0执行调制运算，产生桥臂子模块投入数量命令； D. The valve base control device 0 executes a modulation operation to generate an input quantity command for the bridge arm sub-module; E、所述阀基控制设备0发送桥臂控制命令信息、当前状态信息和请求信号；同时，阀基控制设备1-6接收所述阀基控制设备0发送的桥臂控制命令信息；在8us之后，所述阀基控制设备0进入自检状态； E. The valve base control device 0 sends bridge arm control command information, current status information and request signal; at the same time, the valve base control device 1-6 receives the bridge arm control command information sent by the valve base control device 0; in 8us Afterwards, the valve base control device 0 enters a self-test state; F、所述阀基控制设备1-6进行储能电容电压平衡运算，产生桥臂子模块的投退命令； F. The valve base control device 1-6 performs energy storage capacitor voltage balance calculation, and generates a switching command for the sub-module of the bridge arm; G、所述阀基控制设备1-6向桥臂子模块发送投退命令信息，同时，所述桥臂子模块接收所述阀基控制设备1-6发送的投退命令，所述桥臂子模块执行投退命令并返回当前状态信息；所述阀基控制设备1-6在20us后接收所述桥臂子模块的返回数据； G. The valve base control device 1-6 sends the switching command information to the bridge arm submodule, and at the same time, the bridge arm submodule receives the switching command sent by the valve base control device 1-6, and the bridge arm The sub-module executes the switching command and returns the current state information; the valve base control device 1-6 receives the return data of the bridge arm sub-module after 20us; H、所述阀基控制设备1-6检测桥臂子模块返回状态信息，进行阀故障判断； H. The valve base control device 1-6 detects the status information returned by the bridge arm sub-module, and performs valve fault judgment; I、所述阀基控制设备1-6发送当前储能电容电压量及桥臂子模块状态信息，在8us之后，所述阀基控制设备1-6进入自检状态； 1. The valve base control device 1-6 sends the current energy storage capacitor voltage and the state information of the bridge arm submodule, and after 8us, the valve base control device 1-6 enters the self-test state; 所述模块化多电平柔性直流输电系统包括上层自动化装置、7个阀基控制设备、测量系统和桥臂子模块；所述7个阀基控制设备包括阀基控制设备0-6；所述阀基控制设备0分别与上层自动化装置和测量系统连接；所述阀基控制设备0与阀基控制设备1-6连接；所述阀基控制设备1-6与桥臂子模块连接； The modular multi-level flexible DC transmission system includes an upper-level automation device, 7 valve-base control devices, a measurement system, and a bridge arm sub-module; the 7 valve-base control devices include valve-base control devices 0-6; the The valve base control equipment 0 is connected to the upper automation device and the measurement system respectively; the valve base control equipment 0 is connected to the valve base control equipment 1-6; the valve base control equipment 1-6 is connected to the bridge arm sub-module; 所述桥臂子模块包括绝缘栅双极型功率管IGBT1和IGBT2、晶闸管、储能电容和真空开关；所述真空开关、晶闸管V和IGBT2依次并联；所述IGBT1和IGBT2为上下结构且IGBT1的发射极连接IGBT2的集电极；所述IGBT1和储能电容C串联。 The bridge arm sub-module includes insulated gate bipolar power transistors IGBT1 and IGBT2, thyristors, energy storage capacitors and vacuum switches; the vacuum switch, thyristor V and IGBT2 are connected in parallel in sequence; the IGBT1 and IGBT2 are up and down structures and the IGBT1 The emitter is connected to the collector of the IGBT2; the IGBT1 is connected in series with the energy storage capacitor C. 2.如权利要求 1所述的模块化多电平柔性直流输电系统的阀基控制设备时序方法，其特征在于，所述步骤A中，在每个控制周期起点，所述阀基控制设备0读取与上层自动化装置的通信缓冲区，更新系统控制命令及桥臂电压参考值；所述阀基控制设备0读取与桥臂电流互感器的通信缓冲区，更新桥臂电流量；所述阀基控制设备0读取与阀基控制设备1-6的通信缓冲区，更新储能电容电压量。 2. The valve-based control device timing method of the modularized multi-level flexible direct current transmission system according to claim 1, characterized in that, in the step A, at the starting point of each control cycle, the valve-based control device 0 Read the communication buffer with the upper automation device, update the system control command and the bridge arm voltage reference value; the valve base control device 0 reads the communication buffer with the bridge arm current transformer, and update the bridge arm current; The valve base control device 0 reads the communication buffer with the valve base control devices 1-6, and updates the voltage of the energy storage capacitor. 3. 如权利要求1所述的模块化多电平柔性直流输电系统的阀基控制设备时序方法，其特征在于，所述步骤E中，所述阀基控制设备0向阀基控制设备1-6发送桥臂控制命令信息；所述阀基控制设备0向上层自动化装置发送当前状态信息和请求信号；在8us之后，所述阀基控制设备0进入自检状态；所述阀基控制设备0向阀基控制设备1-6发送桥臂控制命令信息，同时，阀基控制设备1-6接收所述阀基控制设备0发送的桥臂控制命令信息；所述阀基控制设备1-6以接收阀基控制设备0发送的桥臂控制命令信息时刻为阀基控制设备1-6工作周期起点。 3. The valve-based control device sequence method of the modularized multi-level flexible direct current transmission system according to claim 1, characterized in that, in the step E, the valve-based control device 0 to the valve-based control device 1- 6. Send bridge arm control command information; the valve base control device 0 sends current status information and request signals to the upper automation device; after 8us, the valve base control device 0 enters the self-test state; the valve base control device 0 Send bridge arm control command information to the valve base control device 1-6, and at the same time, the valve base control device 1-6 receives the bridge arm control command information sent by the valve base control device 0; the valve base control device 1-6 uses The moment of receiving the bridge arm control command information sent by the valve base control device 0 is the starting point of the working cycle of the valve base control device 1-6. 4. 如权利要求1所述的模块化多电平柔性直流输电系统的阀基控制设备时序方法，其特征在于，所述步骤G中，所述阀基控制设备1-6在48us时向桥臂子模块发送投退命令信息；同时所述桥臂子模块接收阀基控制设备1-6发送的投退命令，所述桥臂子模块执行投退命令并向所述阀基控制设备1-6发送当前状态信息；所述桥臂子模块以接收阀基控制设备1-6发送的投退命令作为工作周期的起点。 4. The valve-based control device timing method of the modularized multi-level flexible direct current transmission system according to claim 1, characterized in that, in the step G, the valve-based control devices 1-6 switch to the bridge at 48 us The arm submodule sends the throwing and withdrawing command information; at the same time, the bridge arm submodule receives the throwing and withdrawing command sent by the valve base control device 1-6, and the bridge arm submodule executes the throwing and withdrawing command and sends a message to the valve base control device 1-6. 6. Send current state information; the bridge arm sub-module receives the switch-on/off command sent by the valve base control device 1-6 as the starting point of the working cycle.
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CN201156671Y (en) * 2007-12-21 2008-11-26 中国西电电气股份有限公司 A valve base electronic control device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3701938A (en) * 1971-08-09 1972-10-31 Gen Electric Minimum valve voltage method and control apparatus for hvdc power converters
CN1158189A (en) * 1995-07-06 1997-08-27 瑞典通用电器勃朗勃威力公司 A power transmission system for high-voltage direct current
CN201156671Y (en) * 2007-12-21 2008-11-26 中国西电电气股份有限公司 A valve base electronic control device

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