CN-121984244-A - Remote switching reclosing system of transformer substation protection device

CN121984244ACN 121984244 ACN121984244 ACN 121984244ACN-121984244-A

Abstract

The invention relates to the technical field of power system automation, in particular to a remote switching reclosing system of a transformer substation protection device, which comprises a dispatching instruction module, a telecontrol communication module, a public measurement and control module, a plug-in execution module and a state feedback module, wherein the dispatching instruction module is used for generating and issuing a reclosing switching remote control instruction, the telecontrol communication module is used for converting the remote control instruction into a standard telecontrol communication protocol and transmitting the standard telecontrol communication protocol to a transformer substation side, the public measurement and control module is used for receiving and processing the standard telecontrol communication protocol to generate an execution signal, the plug-in execution module is used for responding to the execution signal and driving a reclosing hard pressing plate on a transformer substation protection screen to execute switching operation, and the state feedback module is in communication connection with the plug-in execution module and the telecontrol communication module and is used for collecting the actual state of the reclosing hard pressing plate and feeding the actual state back to a dispatching end through the telecontrol communication module to form closed loop control, so that the teleization and automation of the reclosing hard pressing plate operation are realized.

Inventors

HE YI
XU CHENG
Zhou Situo
ZHOU PENG
LIU PENGHUI
XU XIAOBING
XIONG YU
XIA DENGFENG
Yang Tengpo
ZHANG WEI

Assignees

国网湖北省电力有限公司黄冈供电公司

Dates

Publication Date: 20260505
Application Date: 20260128

Claims (10)

1. Remote switching reclosure system of transformer substation protection device, characterized by comprising: the dispatching instruction module is used for generating and issuing a reclosure switching remote control instruction; The telecontrol communication module is in communication connection with the dispatching instruction module and is used for converting the telecontrol instruction into a standard telecontrol communication protocol and transmitting the telecontrol instruction to a transformer station side; The public measurement and control module is arranged at the side of the transformer substation and is in communication connection with the telecontrol communication module, and is used for receiving and processing the standard telecontrol communication protocol to generate an execution signal; The plug-in execution module is connected with the public measurement and control module and is used for responding to the execution signal and driving a reclosing hard pressing plate on a transformer substation protection screen to execute switching operation; The state feedback module is in communication connection with the plug-in execution module and the telecontrol communication module, and is used for collecting the actual state of the reclosing hard pressing plate and feeding back to the dispatching end through the telecontrol communication module.
2. The remote switching recloser system for a substation protection device according to claim 1, wherein the dispatch instruction module comprises: The remote control instruction generation unit is used for generating a reclosing input or exit instruction according to the operation requirement of the power grid; the instruction encryption unit is used for encrypting the instruction by adopting a symmetric encryption algorithm to generate an encrypted instruction; And the instruction priority ordering unit is used for carrying out priority management on the plurality of instructions, wherein the power grid emergency adjustment instruction has the highest priority.
3. The remote switching reclosure system for a substation protection device according to claim 2, wherein the command data generated by the remote command generation unit is binary code.
4. The remote switching recloser system for a substation protection device according to claim 2, wherein the remote communication module comprises: the protocol conversion unit is used for converting and organizing the encryption instruction into a data format conforming to a standard telecontrol communication protocol; The data frame encapsulation unit is connected with the protocol conversion unit and is used for encapsulating the converted data format into a telecontrol frame conforming to the protocol specification for transmission; And the transmission state monitoring unit is used for monitoring the communication quality of a data transmission link used by the telecontrol communication module in real time in the transmission process of the telecontrol frame and generating a link alarm signal when abnormality is detected.
5. The remote switching recloser system according to claim 4, wherein the standard telecontrol communication protocol is IEC 60870-5-104 protocol, and the transmission state monitoring unit is configured to determine that the link is abnormal and generate the link alarm signal when it is detected that the data transmission delay exceeds a preset threshold or the data packet loss rate is greater than a preset threshold.
6. The remote switching recloser system for a substation protection device according to claim 4, wherein the common measurement and control module comprises: the data decryption unit is used for decrypting the received encrypted instruction transmitted by the remote communication module; the integrity checking unit is used for carrying out integrity checking on the decrypted encrypted instruction data and outputting instruction data to be analyzed; the instruction analysis unit is used for analyzing a control command from the instruction data to be analyzed; And the signal conversion unit is used for converting the control command into an execution signal for driving the plug-in execution module.
7. The remote switching recloser system for a substation protection device according to claim 1, wherein the plug-in execution module comprises: the power supply adapting unit is used for accessing a power supply for the substation and supplying power to the inside of the module; the self-locking relay unit is used for receiving the execution signal and generating self-locking driving output; and the coil of the intermediate relay unit is controlled by the self-locking relay unit, and the execution contact of the intermediate relay unit is connected in series into an electric loop of the reclosing hard pressing plate so as to control the pressing plate to be in a switching state through on/off.
8. The remote switching reclosing system of a substation protection device according to claim 7, wherein the power supply adapting unit supports alternating current and direct current input and is internally provided with a protection circuit, and the action response time of the self-locking relay unit is not more than 100ms.
9. The remote switching reclosing system of a substation protection device according to claim 7, wherein the plug-in execution module further comprises an action state monitoring unit for monitoring an action state of the latching relay unit or the intermediate relay unit and generating a fault signal when the action is abnormal.
10. The remote switching recloser system for a substation protection device according to claim 1, wherein the status feedback module comprises: The state acquisition unit is used for acquiring the physical position state of the reclosing hard pressing plate in real time and outputting an original state signal; the data coding unit is connected with the state acquisition unit and is used for coding the original state signal into a remote signaling frame conforming to a remote communication protocol and sending the remote signaling frame to the remote communication module to be fed back to a dispatching end; The verification comparison unit is connected with the state acquisition unit and the plug-in execution module, and is used for comparing the original state signal with the current driving state of the plug-in execution module in real time and outputting a comparison result signal; and the alarm generating unit is connected with the checking and comparing unit and is used for generating device action abnormality alarm information when the comparison result signals indicate that the states are inconsistent and the duration exceeds a preset threshold value.

Description

Remote switching reclosing system of transformer substation protection device Technical Field The invention relates to the technical field of power system automation, in particular to a remote switching reclosing system of a transformer substation protection device. Background In the operation of a power system, the reclosing function of a transformer substation protection device is critical to the power supply after the instantaneous fault is recovered, the switching of the function is required to be flexibly operated according to the operation mode, maintenance operation and the like, at present, a large number of reclosing switching of a transformer substation (especially an early conventional station) still depend on-site operation of a hard pressing plate on a protection screen, or on-site operation of a soft pressing plate through a device menu, and the efficiency is low, the risk is high and the labor cost is high. The bottleneck of the prior art is mainly characterized in that the protection device lacks a remote control interface or does not open related rights, and the communication protocol and the interface of the equipment in the station are different, are not compatible with the standard protocol of the dispatching master station, and are difficult to directly remotely control. The cost of fully replacing equipment or additionally installing the electric pressing plate is high, and the transformation is complex. Therefore, a solution is needed that is low in cost, strong in universality and capable of realizing remote switching reclosure without changing the existing equipment. Disclosure of Invention In order to solve the technical problems, the invention provides the remote switching reclosing system of the transformer substation protection device, which has low cost and strong universality and does not need to change the operation mode of the existing equipment. The invention relates to a remote switching reclosing system of a transformer substation protection device, which comprises the following components: the dispatching instruction module is used for generating and issuing a reclosure switching remote control instruction; The telecontrol communication module is in communication connection with the dispatching instruction module and is used for converting the telecontrol instruction into a standard telecontrol communication protocol and transmitting the telecontrol instruction to a transformer station side; The public measurement and control module is arranged at the side of the transformer substation and is in communication connection with the telecontrol communication module, and is used for receiving and processing the standard telecontrol communication protocol to generate an execution signal; The plug-in execution module is connected with the public measurement and control module and is used for responding to the execution signal and driving a reclosing hard pressing plate on a transformer substation protection screen to execute switching operation; The state feedback module is in communication connection with the plug-in execution module and the telecontrol communication module, and is used for collecting the actual state of the reclosing hard pressing plate and feeding back to the dispatching end through the telecontrol communication module. Preferably, the scheduling instruction module includes: The remote control instruction generation unit is used for generating a reclosing input or exit instruction according to the operation requirement of the power grid; the instruction encryption unit is used for encrypting the instruction by adopting a symmetric encryption algorithm to generate an encrypted instruction; And the instruction priority ordering unit is used for carrying out priority management on the plurality of instructions, wherein the power grid emergency adjustment instruction has the highest priority. Preferably, the instruction data generated by the remote control instruction generating unit is binary code. Preferably, the telecontrol communication module includes: the protocol conversion unit is used for converting and organizing the encryption instruction into a data format conforming to a standard telecontrol communication protocol; The data frame encapsulation unit is connected with the protocol conversion unit and is used for encapsulating the converted data format into a telecontrol frame conforming to the protocol specification for transmission; And the transmission state monitoring unit is used for monitoring the communication quality of a data transmission link used by the telecontrol communication module in real time in the transmission process of the telecontrol frame and generating a link alarm signal when abnormality is detected. Preferably, the standard telecontrol communication protocol is IEC 60870-5-104 protocol, and the transmission state monitoring unit is configured to judge that the link is abnormal and generate the link alarm signal when the data t