CN204497849U - A kind ofly take into account measure and control device that is centralized, formula feeder automation on the spot - Google Patents

Abstract

The utility model discloses a measurement and control device for both centralized and local feeder automation, which belongs to the technical field of distribution network feeder automation. It includes a local feeder automation unit and a centralized feeder automation unit; the local feeder automation unit is installed on the user branch feeder line; when the remote communication inside the centralized feeder automation unit is smooth, in the state of feeder line failure Next, the centralized feeder automation unit is used to isolate the fault through remote control; the local feeder automation unit can communicate with the centralized feeder automation unit; when the above-mentioned remote communication fails, the centralized The feeder automation unit notifies the local feeder automation unit, and at this time, the local feeder automation unit is used to isolate the fault. Regardless of whether the communication is smooth or not, the measurement and control device can realize fault location, isolation and restoration of power supply in the case of a power distribution network failure, and the cost is controllable.

Description

A measurement and control device that takes into account both centralized and local feeder automation

technical field

The utility model relates to the technical field of distribution network feeder automation, in particular to a measurement and control device for both centralized and local feeder automation.

Background technique

In my country's power distribution network, overhead lines occupy a considerable proportion. When a fault occurs in the user branch of the overhead distribution line, that is, the T connection, that is, the demarcation point of the responsibility of the power supply department and the user, if the fault location is not timely, it will often cause the expansion of the accident, and then cause the outlet protection action of the substation, making the entire distribution line The main power line was cut off, resulting in an accident. According to current statistics, such spillover accidents account for about 30% of the total number of distribution network accidents in my country, and even as high as 70% in some areas.

With the continuous improvement of power users' requirements for power supply reliability and power quality, the power supply department pays more and more attention to distribution network feeder automation. Feeder automation refers to the automation of feeder lines between substation outgoing lines and user electrical equipment. Its content can be summarized into two aspects: one is user detection, data measurement and operation optimization under normal conditions; the other is fault status. Automatic location, fault isolation and power restoration control.

In the prior art, in order to realize automatic fault location, fault isolation, and power restoration under fault conditions, and to avoid or reduce the impact of distribution network faults on power users, the applied distribution network feeder automation technology scheme includes a simple scheme, that is, fault indication Controller scheme, local feeder automation scheme, centralized feeder automation scheme and distributed intelligent control scheme.

in,

The simple solution, the fault indicator solution, is cheap.

The on-site feeder automation scheme can detect changes in line voltage and current, and the substation outlet circuit breaker or recloser cooperates with the automatic sectionalizer on the line to perform multiple opening and closing operations in accordance with the set logic sequence, thereby Complete fault isolation and restore power. This scheme does not require communication support, nor does it need to rely on the master station system. For example, the Chinese utility model patent with the authorized announcement number CN 202084917 U discloses an on-site feeder automation device, which includes a feeder automation unit FTU installed on the feeder line, and the input end of the feeder automation unit FTU communicates with the The DTU communication of the feeder monitoring system, the input terminal of the feeder circuit breaker unit FTU communicates with the adjacent feeder automation unit FTU through the protection communication channel, and the output terminal of the feeder circuit breaker unit FTU is connected with the circuit breaker. After the exchange of signals, it can complete the judgment of the fault range, and only remove the circuit breakers on both sides of the fault section, which can realize the selective removal of faults and avoid the power failure of the non-fault section line; The information exchange of the direction of the fault power is realized, each feeder automation unit FTU works independently, the fault analysis is timely, and the action of removing the fault is fast, and the action time is less than 25ms.

The centralized feeder automation solution is to control the main station or sub-station through the communication system to collect the faults of each distribution terminal, including remote terminal control system (RTU), feeder terminal unit (FTU) and distribution transformer detection terminal (TTU), etc. Detection information, according to the system topology and preset algorithms to achieve fault isolation and restore power supply.

The intelligent distributed feeder automation scheme is based on point-to-point communication intelligent distributed feeder automation, which can quickly isolate faults. For example, the Chinese utility model patent with the authorized announcement number CN 202872465U discloses an intelligent distributed feeder automation control system, which includes a plurality of power distribution terminals and a plurality of feeder automation control terminals, and each feeder automation control terminal corresponds to a plurality of distribution Each power distribution terminal corresponds to each switch on the feeder; the feeder automation control terminal is provided with two Ethernet interfaces and multiple serial communication interfaces; the serial communication interfaces of each power distribution terminal are respectively connected to Corresponding to the serial communication interface of the feeder automation control terminal; the Ethernet interface of each power distribution terminal is respectively connected to the first Ethernet port of the corresponding feeder automation control terminal, and the second Ethernet interface of each feeder automation control terminal is connected to the same Ethernet network . It can overcome the defect that the existing feeder automation system is not easy to maintain, and is easier to maintain.

In the process of realizing the utility model, the inventor finds that there are at least the following problems in the prior art:

The simple solution, that is, the fault indicator solution can only locate the fault, but cannot effectively isolate the fault, let alone restore power supply.

The on-site feeder automation scheme needs multiple overlaps to faults, causing multiple impacts on the system. Therefore, it is usually only applied to suburban and rural overhead distribution lines that do not require high power supply quality and poor communication conditions. Under normal circumstances, it is difficult to apply to areas with high requirements on power supply quality, such as community users with dense high-tech enterprises.

The centralized feeder automation solution requires remote communication support and the establishment of a master station system. The investment cost is relatively high, and it is usually only used in areas with high requirements for power supply quality. If it is applied to suburban and rural overhead distribution with poor traffic conditions wires, not practical. Once the main station is paralyzed or the remote communication line fails, the feeder automation will not be realized automatically, and it can only rely on manual fault isolation and power restoration.

The intelligent distributed feeder automation solution requires an optical fiber communication network. Once a communication failure occurs, the feeder automation will not be realized; in addition, the intelligent distributed feeder automation solution needs to obtain the information of the downstream node device. When the network topology is complex, the upstream and downstream adjacent nodes are both When there are many devices, the logic processing will be very complicated.

Utility model content

In view of this, the utility model provides a measurement and control device that takes into account both centralized and local feeder automation. Under such circumstances, fault location, isolation and restoration of power supply can be realized, and the cost is controllable, so it is more suitable for practical use.

In order to achieve the above object, the utility model mainly provides the following technical solutions:

The measurement and control device for both centralized and local feeder automation provided by the embodiment of the utility model includes: a local feeder automation unit and a centralized feeder automation unit; the local feeder automation unit is installed on the user branch feeder circuit ;

When the remote communication inside the centralized feeder automation unit is smooth, in the state of feeder line failure, the centralized feeder automation unit is used to isolate the fault through remote control;

The on-site feeder automation unit can communicate with the centralized feeder automation unit;

When the remote communication inside the centralized feeder automation unit fails, the centralized feeder automation unit notifies the on-site feeder automation unit in the state of feeder line failure. At this time, the on-site feeder automation unit Automation cells are used to isolate faults.

The purpose of the utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

Preferably, the local feeder automation unit includes a circuit breaker or a load switch, the circuit breaker or load switch is installed on the feeder line, and when a fault needs to be isolated, the circuit breaker or load switch performs an opening operation, The circuit breaker or load switch is capable of communicating with the centralized feeder automation unit.

Preferably, the centralized feeder automation unit includes a measurement and control unit, a remote control terminal,

The measurement and control unit is used to send the real-time operating condition signal of the feeder line to the remote control terminal; when the feeder line is faulty, the measurement and control unit is also used to isolate the feeder line fault;

The measurement and control unit is also used to communicate with the local feeder automation unit;

The remote control terminal is used to receive the signal collected from the measurement and control unit; in the state of the feeder line fault, the remote control terminal sends a control command to the measurement and control unit through remote communication to isolate the fault.

Preferably, the centralized feeder automation unit includes a measurement and control unit, a remote control terminal,

The measurement and control unit is used to send the real-time operating condition signal of the feeder line to the remote control terminal; when the feeder line is faulty, the measurement and control unit is also used to isolate the feeder line fault;

The measurement and control unit is also used to communicate with the circuit breaker or load switch;

The remote control terminal is used to receive the signal collected from the measurement and control unit; when the feeder line is faulty, the remote control terminal sends a control command to the measurement and control unit through remote communication to isolate the fault.

As a preference, the measurement and control device for centralized and local feeder automation also includes a signal acquisition device integrated on the circuit breaker or load switch, and the signal acquisition device is used to collect feeder line real-time operating condition of the feeder line, and send the real-time operating condition signal of the feeder line to the measurement and control unit.

Preferably, the communication between the local feeder automation unit and the centralized feeder automation unit is wired communication or wireless communication.

Preferably, the remote control terminal is implemented based on DEP-900 series feeder terminal devices or Dongfang Electronics DF9311 series feeder terminal devices.

Preferably, when the fault generated on the feeder line is an instantaneous fault, when the instantaneous fault is eliminated, the circuit breaker or load switch can perform the closing operation again.

Preferably, the measurement and control unit sends a real-time operating condition signal of the feeder line to the remote control terminal, and the remote control terminal calculates and feeds back the calculation result in real time according to its built-in protection logic. When the remote control terminal When the terminal or the measurement and control unit does not respond, the response is garbled, or the response is delayed, the centralized feeder automation unit reports to the local feeder automation unit the long-distance communication obstacle inside the centralized feeder automation unit.

Preferably, the measurement and control unit and the remote control terminal carry a self-inspection system respectively, and when the self-inspection system carried by the measurement and control unit or the remote control terminal reports an obstacle, the centralized feeder automation unit also reports to the on-site The centralized feeder automation unit reports a telecommunication failure within the centralized feeder automation unit.

The measurement and control device for both centralized and local feeder automation provided by the embodiment of the present invention includes a local feeder automation unit and a centralized feeder automation unit. When the remote communication inside the centralized feeder automation unit is smooth, the centralized feeder automation unit can be applied The feeder automation unit isolates faults. When the remote communication within the centralized feeder automation unit fails, the local feeder automation unit can be used to isolate the fault. In case of network failure, fault location, isolation and restoration of power supply are realized. Moreover, since the local feeder automation unit and the centralized feeder automation unit used in it are only on the basis of the existing local feeder automation unit and the centralized feeder automation unit, a short-distance communication module is added between them , so that they can realize short-distance communication, so the cost is controllable.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating preferred embodiments, and are not considered to limit the present invention. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:

Fig. 1 is a schematic diagram of a measurement and control device for both centralized and local feeder automation provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic diagram of a measurement and control device for both centralized and local feeder automation provided by Embodiment 2 of the present invention;

Fig. 3 is a schematic diagram of the signal flow of each functional module of the measurement and control unit used in the centralized and local feeder automatic measurement and control device provided by any one of the first to fourth embodiments of the utility model.

Detailed ways

In order to solve the problems existing in the feeder automation scheme of the prior art, the utility model provides a measurement and control device for both centralized and local feeder automation, so that no matter whether the internal communication of the centralized feeder automation unit is smooth or not, it can be used in distribution. In the event of an electrical network failure, fault location, isolation, and restoration of power supply can be achieved with controllable costs.

The technical solution of the utility model embodiment is to solve the above-mentioned technical problems, and general train of thought is as follows:

The measurement and control device for both centralized and local feeder automation provided by the embodiment of the utility model includes: a local feeder automation unit and a centralized feeder automation unit;

The local feeder automation unit is installed on the user branch feeder line;

When the remote communication inside the centralized feeder automation unit is smooth, in the state of feeder line failure, the centralized feeder automation unit is used to isolate the fault through remote control; between the local feeder automation unit and the centralized feeder automation unit able to communicate;

When the remote communication inside the centralized feeder automation unit fails, the centralized feeder automation unit notifies the local feeder automation unit in the state of feeder line failure. At this time, the local feeder automation unit is used to isolate the fault.

The measurement and control device for both centralized and local feeder automation provided by the embodiment of the present invention includes a local feeder automation unit and a centralized feeder automation unit. When the remote communication inside the centralized feeder automation unit is smooth, the centralized feeder automation unit can be applied The feeder automation unit isolates faults. When the remote communication within the centralized feeder automation unit fails, the local feeder automation unit can be used to isolate the fault. In the event of a fault, fault location, isolation, and power restoration are achieved. Moreover, since the local feeder automation unit and the centralized feeder automation unit used in it are only on the basis of the existing local feeder automation unit and the centralized feeder automation unit, a short-distance communication module is added between them , so that they can realize short-distance communication, so the cost is controllable.

In order to further explain the technical means and effects of the utility model to achieve the intended purpose of the utility model, the following will be combined with the accompanying drawings and preferred embodiments to discuss the centralized and local feeder automation measurement and control device proposed according to the utility model. Its specific implementation, structure, feature and effect thereof are described in detail as follows. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B. The specific understanding is: A and B can be included at the same time, and A and B can be included separately. A exists, B may exist alone, and any of the above three situations can be met.

Embodiment one

Referring to the accompanying drawing 1, the measurement and control device for centralized and local feeder automation provided by Embodiment 1 of the present utility model is realized based on the structure shown in the accompanying drawing 1, wherein, the main line 4 after the substation 1 passes through the outlet circuit breaker 2 There are a plurality of section switches 3a, 3b, 3c..., among them, the user branch feeder line 5 is drawn from between the section switches 3a and 3b on the main line 4, and the local feeder automation unit 6 is installed on the user branch feeder. On the electric line 5, the arrow 7 pointing from the measurement and control unit 9 to the on-site feeder automation unit 6 indicates that the signal is sent from the measurement and control unit 9 to the on-site feeder automation unit 6, that is, the on-site feeder automation unit 6 can communicate with the measurement and control unit 9 The communication between them is one-way, and the part marked with 10 represents the communication line used between the measurement and control unit 9 and the remote control terminal.

In this embodiment, the local feeder automation unit 6 includes a circuit breaker, which is installed on the feeder line 5. When a fault needs to be isolated, the circuit breaker performs an opening operation, and the circuit breaker can communicate with the centralized feeder automation unit. .

In this embodiment, the centralized feeder automation unit includes a measurement and control unit 9 and a remote control terminal. The measurement and control unit 9 is used to transmit the real-time operating condition signal of the feeder line (in this embodiment, the real-time operating condition signal includes voltage, current, Frequency, phase angle and other electrical quantities) are sent to the remote control terminal (in this embodiment, the built-in logic of the remote control terminal will perform protection logic calculations such as over-current, zero-sequence over-current, and inverse time-limit over-current); In the state of failure, the measurement and control unit 9 is also used to isolate the feeder line fault; the measurement and control unit 9 is also used to communicate with the local feeder automation unit; the remote control terminal is used to receive signals from the measurement and control unit 9; In the state, the remote control terminal isolates the fault through remote control.

In this embodiment, the measurement and control unit 9 is used for communicating with the circuit breaker. In this case, the centralized and local feeder automation measurement and control device provided by Embodiment 1 of the utility model can automatically remove single-phase ground faults and phase-to-phase faults in the area.

In this embodiment, the circuit breaker is FZW28-12/630-20 watchdog boundary circuit breaker. Its functions mainly include:

1) Automatic removal of single-phase ground fault: When a single-phase ground fault occurs in the branch line of the user, the demarcation switch will automatically open to remove the faulty branch line to ensure the safe operation of substations and other branch users on the feeder line.

2) Automatic disconnection of phase-to-phase short-circuit fault: When a phase-to-phase short-circuit fault occurs in the user branch line, the boundary circuit breaker immediately opens and throws off the faulty line. The faulty line is isolated, so that other branch users on the feeder can quickly restore power supply.

3) Quickly locate the fault point: After the fault of the branch line of the user causes the boundary switch to operate, only the responsible user will have a power outage, and the fault information can be reported proactively, so that the power company can quickly identify the fault point, carry out on-site treatment in time, and restore the power supply of the faulty line as soon as possible.

4) Monitoring user load: The boundary circuit breaker can transmit the detection data to the power management center to realize real-time monitoring of remote loads.

The fault handling method of FZW28-12/630-20 watchdog boundary circuit breaker is shown in the table below

In this embodiment, the remote control terminal is implemented based on the DEP-900 series feeder terminal unit FTU or Dongfang Electronics DF9311 series feeder terminal unit. Among them, the DEP-900 series FTU has a capacity of 8 channels of telemetry (YC), 16 channels of remote signal (YX), 2 channels of remote control (YK), and 4 channels of RS-232/485 interfaces. Its main functions are: data acquisition, feeder monitoring, fault detection, switch opening and closing control, automatic fault isolation and self-recovery of fault line power supply, automatic load transfer, storage and reporting of load values, acceptance of remote operation instructions and forwarding of collected data and information , with the appropriate communication interface, sampling interface and output interface, to meet the requirements of indoor and outdoor environments. DEP-900 series FTU also has the function of fault current state differential protection. It is based on the fault current state differential principle and acts as feeder protection for each circuit breaker. The feeder circuit breaker is not used for equipment and backup protection. When the main protection refuses to operate, the outlet switch of the substation will trip, and then the distribution network management software will judge and isolate the fault by remote control. The distribution network in this area adopts a ring network structure, and the power is taken from different buses on the 10kV side of the 110kV substation, which operates in a closed-loop manner. When a fault occurs in the system, it can cut off the fault instantaneously and ensure uninterrupted power supply in the fault-free area. Therefore, higher requirements are put forward for the electrical equipment and protection methods of the distribution network. At this time, only the DEP-900 series with strong performance can be selected. FTU.

Referring to accompanying drawing 3, in this embodiment, the measurement and control unit 9 is composed of main modules such as CPU board, power board, human-computer interaction board, communication module, power management module, battery, etc., and is built in a stainless steel box-type cabinet. The cabinet is usually installed under the switch body, and connected to the switch body, PT, CT, etc. through aviation cable connectors to obtain electrical quantities such as working power, voltage, and current, as well as status information such as switch position and energy storage status. During operation, the device collects 2 voltages (Uab, Ucb) and 4 currents (Ia, Ib, Ic, I0) in real time, as well as switch position, energy storage status, etc. Section, zero-sequence overcurrent, overvoltage protection, reclosing, post-acceleration and other functions, thus forming an in-situ feeder protection function. When a fault occurs, the measurement and control unit 9 can identify the fault in the zone (the fault outside the zone does not respond), and isolate it so that the fault will not spread to the main line 4, thereby not affecting the normal power supply of the main line 4; if it is an instantaneous fault, it can also The power supply is restored through the reclosing function, thereby realizing the local feeder automation function. This function does not need the support of the network, master station or substation system. It is low-cost, simple and reliable, and is especially suitable for the operation monitoring of T-connection users. The measurement and control unit 9 also has measurement and control functions. The accuracy of remote measurement of current and voltage can reach 5‰, and the accuracy of remote measurement of active power, reactive power and power factor can reach 1%. It can detect 2-13 harmonics of line current; it can monitor 4 Remote signaling of switch quantity displacement. It can realize the automatic maintenance of the battery and the seamless switching of the main and backup power sources. After the main power supply fails, the device can work normally for no less than 12 hours. Regarding the centralized feeder automation unit, the measurement and control unit 9 is connected to the distribution automation master station or substation system through GPRS, Ethernet and other communication modules, and the above-mentioned electrical quantities (voltage, current, frequency, active power, reactive power, power factor), The state quantity (opening and closing position, energy storage state) is transmitted to the main station or substation system by the standard IEC101 protocol or IEC104 protocol, and receives control commands from the main station or substation system (opening and closing commands, reset commands, Set the fixed value, etc.), and remotely operate the feeder switch, so as to realize real-time monitoring, fault identification, fault isolation, and network reconfiguration of the distribution network. This function requires the cooperation of the main station or sub-station system and the network. Although the overall cost is slightly higher, the main station or sub-station system can monitor the operation of important users in real time, and can adjust the setting value to adjust the operation mode of the device, which is very important for ensuring the safety of important users. Fault isolation, power restoration, reliable power usage, and global operation of the grid are more beneficial.

Under the conditions of the centralized and local feeder automation measurement and control device provided by Embodiment 1 of the present utility model, the measurement and control unit 9 needs to collect real-time operating condition signals through the distribution transformer monitoring terminal (TTU), perform data control and realize communication.

Among them, the measurement and control unit 9 sends the real-time operating condition signal of the feeder line to the remote control terminal, and the remote control terminal calculates and feeds back the calculation result in real time according to its built-in protection logic. When used between the measurement and control unit 9 and the remote control terminal When the communication line 10 between them is blocked, the result presented is that the remote control terminal or the measurement and control unit 9 does not respond, the response is garbled or the response is delayed, and the centralized feeder automation unit reports to the local feeder automation unit. communication barriers. In this embodiment, the measurement and control unit 9 reports to the circuit breaker the remote communication failure inside the centralized feeder automation unit, thereby starting the local feeder automation unit, single-phase ground fault in the isolated area, and phase-to-phase fault.

In addition, since the remote communication obstacle inside the centralized feeder automation unit is not only caused by the communication line 10 between the measurement and control unit 9 and the remote control terminal, it can also be caused by the failure of the measurement and control unit 9 itself or the remote control terminal itself, Therefore, the measurement and control unit 9 and the remote control terminal themselves carry self-inspection systems respectively, and when the self-inspection system carried by the measurement and control unit 9 or the remote control terminal reports an obstacle, the centralized feeder automation unit also reports the centralized feeder automation unit to the local feeder automation unit. Barriers to remote communication within feeder automation units. In this embodiment, the measurement and control unit 9 reports to the circuit breaker the remote communication failure inside the centralized feeder automation unit, thereby starting the local feeder automation unit, single-phase ground fault in the isolated area, and phase-to-phase fault.

Embodiment two

The difference from the centralized and on-site feeder automation measurement and control device provided by the first embodiment of the utility model is that in the second embodiment of the utility model, the centralized and on-site feeder automation measurement and control device is The ground-type feeder automation unit 6 is replaced by a load switch, which can remove the single-phase ground fault in the area, and isolate the phase-to-phase fault through the cooperation of the substation outlet circuit breaker 2 .

Embodiment Three

Referring to accompanying drawing 2, the improvement is made on the basis of the measurement and control device for both centralized and on-site feeder automation provided by Embodiment 1 or Embodiment 2 of the present invention, and the centralized and on-site feeder automation device provided by Embodiment 3 of the present The measurement and control device for feeder automation also includes a signal acquisition device (not shown in Figure 2), the signal acquisition device is integrated on the circuit breaker or load switch, the signal acquisition device is used to collect the real-time operating conditions of the feeder line, and The real-time operating condition signal of the feeder line is sent to the measurement and control unit. At this time, the communication between the on-site feeder automation unit 6 and the measurement and control unit 9 is bidirectional, and the arrow 7 pointing from the measurement and control unit 9 to the on-site feeder automation unit 6 indicates that the signal is sent from the measurement and control unit 9 to the on-site feeder The automation unit 6 , the arrow 8 pointing from the on-site feeder automation unit 6 to the measurement and control unit 9 indicates that the signal is sent from the on-site feeder automation unit 6 to the measurement and control unit 9 . In this case, integrating the acquisition module directly on the on-site feeder automation unit 6 and endowing the on-site feeder automation unit 6 with a communication function can make the on-site feeder automation unit 6 itself more powerful.

Wherein, the communication between the local feeder automation unit 6 and the centralized feeder automation unit is wired communication or wireless communication. For this embodiment, that is, the communication between the circuit breaker or the load switch and the measurement and control unit 9 is wired communication or wireless communication, wherein the wired communication can be communication through a communication data line with a double-ended USB interface or communication through an Ethernet network; wireless communication Communication can be realized based on Bluetooth technology, or through Wi-Fi technology. Among them, the signal transmission distance of the communication data line with double-ended USB interface, Bluetooth technology or Wi-Fi technology is relatively short, and if the communication is carried out through the Ethernet network, both short-distance communication and long-distance communication can be realized.

Embodiment Four

Improvements are made on the basis of the measurement and control device for both centralized and local feeder automation provided by any one of Embodiments 1 to 3 of the utility model, and the centralized and local feeder provided by Embodiment 4 of the present utility model In the automatic measurement and control device, when the fault generated on the feeder line is an instantaneous fault, when the instantaneous fault is eliminated, the circuit breaker or load switch can perform the closing operation again. Therefore, the measurement and control device provided by Embodiment 4 of the present utility model that takes into account both centralized and local feeder automation can realize the automatic elimination function for instantaneous faults.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model still belong to the Within the scope of the technical solution of the utility model.

Claims (10)

1. A measurement and control device giving consideration to centralized and on-site feeder automation is characterized by comprising an on-site feeder automation unit and a centralized feeder automation unit; the local feeder automation unit is arranged on the user branch feeder circuit;

when the remote communication in the centralized feeder automation unit is smooth, the centralized feeder automation unit is used for isolating faults through remote control under the state of feeder circuit faults;

the local feeder automation unit and the centralized feeder automation unit are capable of communicating with each other;

when telecommunication inside the centralized feeder automation unit fails, the centralized feeder automation unit notifies the local feeder automation unit in a feeder line failure state, and at this time, the local feeder automation unit is used for isolating the failure.

2. The measurement and control device for centralized and in-situ feeder automation as claimed in claim 1, wherein the in-situ feeder automation unit comprises a circuit breaker or a load switch, the circuit breaker or the load switch is installed on a feeder circuit, when fault isolation is required, the circuit breaker or the load switch performs a switching-off operation, and the circuit breaker or the load switch can communicate with the centralized feeder automation unit.

3. The measurement and control device compatible with centralized and in-situ feeder automation as claimed in claim 1, wherein the centralized feeder automation unit comprises a measurement and control unit and a remote control terminal,

the measurement and control unit is used for sending a real-time operation condition signal of the feed line to the remote control terminal; the measurement and control unit is also used for isolating the feeder line fault in the state of the feeder line fault;

the measurement and control unit is also used for communicating with the on-site feeder automation unit;

the remote control terminal is used for receiving the signals collected by the measurement and control unit; and under the state of the failure of the feeder line, the remote control terminal sends a control command to the measurement and control unit through remote communication to isolate the failure.

4. The measurement and control device compatible with centralized and in-situ feeder automation as claimed in claim 2, wherein the centralized feeder automation unit comprises a measurement and control unit and a remote control terminal,

the measurement and control unit is used for sending a real-time operation condition signal of the feed line to the remote control terminal; the measurement and control unit is also used for isolating the feeder line fault in the state of the feeder line fault;

the measurement and control unit is also used for communicating with the circuit breaker or the load switch;

the remote control terminal is used for receiving the signals collected by the measurement and control unit; and under the state of the failure of the feeder line, the remote control terminal sends a control command to the measurement and control unit through remote communication to isolate the failure.

5. The measurement and control device considering centralized and in-place feeder automation as claimed in claim 4, further comprising a signal acquisition device integrated on the circuit breaker or the load switch, wherein the signal acquisition device is configured to acquire real-time operating conditions of the feeder line and send signals of the real-time operating conditions of the feeder line to the measurement and control unit.

6. The centralized, in-place, feeder automation enabled measurement and control device of claim 1 or 5, wherein the communication between the in-place feeder automation unit and the centralized feeder automation unit is wired communication or wireless communication.

7. The measurement and control device for centralized and in-situ feeder automation as recited in any one of claims 3 to 5, wherein the remote control terminal is implemented based on a DEP-900 series feeder terminal device or an east electronic DF9311 series feeder terminal device.

8. The measurement and control device compatible with centralized, in-situ feeder automation according to claim 2 or 5, characterized in that in case the fault generated on the feeder line is a transient fault, when said transient fault is eliminated, said circuit breaker or load switch can also perform the closing operation again.

9. The measurement and control device according to any one of claims 3 to 5, wherein the measurement and control unit sends a real-time operating condition signal of a feeder line to the remote control terminal, the remote control terminal feeds back a calculation result in real time after calculating according to a protection logic arranged in the remote control terminal, and when the remote control terminal or the measurement and control unit has no response, response messy codes or response delay, the centralized feeder automation unit reports a remote communication obstacle inside the centralized feeder automation unit to the local feeder automation unit.

10. The measurement and control device according to any one of claims 3 to 5, wherein the measurement and control unit and the remote control terminal each carry a self-checking system, and when the self-checking system carried by the measurement and control unit or the remote control terminal reports a failure, the centralized feeder automation unit also reports a remote communication failure inside the centralized feeder automation unit to the local feeder automation unit.