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Method and device for analyzing reasons of disconnection signals of control loop of circuit breaker

A control loop and signal generation technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of complex, time-consuming and labor-intensive secondary loops of control loop disconnection signals, so as to improve the efficiency of fault maintenance and reduce time. and artificial effects

Active Publication Date: 2021-02-05
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the principles involved in the disconnection signal of the control loop and the secondary loop are relatively complicated, and the existing analysis and processing methods for its causes completely rely on the personal skills and experience accumulation of the operation and maintenance personnel, which is not only time-consuming but also labor-intensive.

Method used

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  • Method and device for analyzing reasons of disconnection signals of control loop of circuit breaker
  • Method and device for analyzing reasons of disconnection signals of control loop of circuit breaker
  • Method and device for analyzing reasons of disconnection signals of control loop of circuit breaker

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Embodiment 1

[0038] figure 1 It is a flow chart of a method for analyzing the cause of a control loop disconnection signal generated by a circuit breaker provided by Embodiment 1 of the present invention. This embodiment is applicable to when the secondary control loop of the circuit breaker fails and the power grid sends a circuit breaker control loop disconnection In the case of the signal, the method can be implemented by an analysis device for the cause of the disconnection signal of the circuit breaker control circuit. Such as figure 1 As shown, the method specifically includes:

[0039] S110. Obtain the state of the key signal when the disconnection signal of the control loop of the circuit breaker is generated; wherein, the key signal is a signal for judging the cause of the disconnection signal of the control loop of the circuit breaker.

[0040] Specifically, during the operation of the power grid, real-time monitoring of data such as remote signaling and telemetry of the substa...

Embodiment 2

[0046] figure 2 It is a flow chart of a method for analyzing the cause of a circuit breaker control loop disconnection signal provided by Embodiment 2 of the present invention. Such as figure 2 As shown, the method includes:

[0047] S210. Obtain a known sample set of the disconnection signal of the control loop of the circuit breaker; the known sample set includes the state and cause of the key signal when the disconnection signal of the control loop of the historical circuit breaker is generated.

[0048] Specifically, the known sample set may be a set of states and causes of key signals when multiple historical circuit breaker control loop disconnection signals are generated. Exemplarily, the known sample set may be the states and causes of key signals when all historical circuit breaker control loop disconnection signals are generated, by collecting the states and reasons of key signals when all historical circuit breaker control circuit disconnection signals are gener...

Embodiment 3

[0079] The embodiment of the present invention also provides a device for analyzing the cause of the disconnection signal of the control circuit of the circuit breaker. image 3 A schematic structural diagram of a device for analyzing the cause of a circuit breaker control circuit disconnection signal provided by Embodiment 3 of the present invention. Such as image 3 As shown, the device includes:

[0080] The state acquisition module 10 is used to obtain the state of the key signal when the circuit breaker control loop disconnection signal is generated; wherein the key signal is a signal for judging the cause of the circuit breaker control circuit disconnection signal;

[0081] The probability calculation module 20 is used to calculate the probability of different reasons for the disconnection signal of the circuit breaker control loop through the Bayesian algorithm according to the state of the key signal;

[0082] The cause determination module 30 is configured to determ...

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Abstract

The invention discloses a method and a device for analyzing reasons of disconnection signals of a control loop of a circuit breaker. The method comprises the following steps: acquiring the state of akey signal when a circuit breaker control loop disconnection signal is generated; according to the state of the key signal, calculating the probabilities of different reasons for generating the circuit breaker control loop disconnection signal through a Bayesian algorithm; and according to the probabilities of different reasons, determining reasons for generating the disconnection signals of the control loop of the circuit breaker. According to the method, the probabilities of different reasons for generating the circuit breaker control loop disconnection signal of the key signal in the current state are calculated by adopting the Bayesian algorithm, and then the reasons for generating the circuit breaker control loop disconnection signal are determined according to the probabilities of the different reasons, so that a direction for troubleshooting fault reasons is provided for operation and maintenance personnel; requirements for professional technology and experience accumulation foroperation and maintenance personnel to analyze fault causes are lowered, time and labor for the operation and maintenance personnel to analyze the fault causes can be reduced, and fault maintenance efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of grid automatic diagnosis, in particular to a method and device for analyzing the cause of a circuit breaker control loop disconnection signal. Background technique [0002] In the power grid, the disconnection signal of the control circuit of the circuit breaker is the early warning information used to detect whether the secondary control circuit of the circuit breaker is complete. When the protection device in the power grid and the background monitoring machine send out the "control circuit disconnection" alarm signal, it indicates that there is a problem in the control circuit of the circuit breaker, and the circuit breaker will not be able to perform normal opening and closing operations and protection tripping operations. If the power grid fails at this time, there will be a circuit breaker refusal to operate and a leapfrog trip, causing a large-scale power outage, and even causing accidents such as ...

Claims

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Application Information

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IPC IPC(8): H02H7/26
CPCH02H7/26
Inventor 邹培源
Owner GUANGDONG POWER GRID CO LTD
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