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Monitoring system and monitoring method for circuit breaker state based on divide-shut brake coil current

A technology of circuit breaker status and opening and closing coils, which is applied in the field of circuit breaker state monitoring systems based on the current of the opening and closing coils, can solve the problems of endangering the work reliability of circuit breakers, time-consuming and laborious, and shutdown, and achieves improved reliability and reliability. The effect of safety, simple structure and easy implementation

Active Publication Date: 2017-02-22
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional method, the maintenance of circuit breakers is mostly based on predetermined procedures for regular maintenance, but the form of regular maintenance is time-consuming and laborious, causing unnecessary shutdowns and other defects, endangering the reliability of the circuit breaker, and even introducing new faults during maintenance.

Method used

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  • Monitoring system and monitoring method for circuit breaker state based on divide-shut brake coil current
  • Monitoring system and monitoring method for circuit breaker state based on divide-shut brake coil current
  • Monitoring system and monitoring method for circuit breaker state based on divide-shut brake coil current

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Embodiment Construction

[0030] see figure 1 , the circuit breaker state monitoring system based on the opening and closing coil current in this embodiment includes:

[0031] A current sensor adopts a current transformer to detect the current signal of the opening and closing coil of the circuit breaker.

[0032] A signal conditioning module, which is connected with the current sensor, includes a current signal conditioning chip for receiving the current signal output by the current sensor, filtering and amplifying the current signal, and outputting the conditioned current signal.

[0033] A signal extraction module, which is connected with the signal conditioning module, is used for receiving the conditioned current signal transmitted by the signal conditioning module, and extracting and obtaining the current waveform signal.

[0034] A signal analysis display terminal, which is connected with the signal extraction module, is used to receive the current waveform signal transmitted by the signal extr...

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Abstract

The invention discloses a monitoring system and monitoring method for circuit breaker state. The circuit breaker state monitoring system and monitoring method based on the divide-shut brake coil current are characterized in that the system comprises a current sensor, a signal conditioning module, a signal extracting module and a signal analyzing displaying terminal; a current signal of the circuit breaker divide-shut brake coil is detected by utilizing the current sensor, with respect to obtained circuit signals of a normal working condition circuit breaker and a monitored circuit breaker, circuit vector set similarity is calculated, and a monitoring result is thus judged. According to the monitoring system and monitoring method for the circuit breaker state, by conducting identification on a mechanical state of the circuit breaker, a potential failure can be found in time when the circuit breaker switches and closes, and reliability and safety of operation of the circuit breaker and an electric power system can be improved.

Description

technical field [0001] The invention relates to the technical field of circuit breaker monitoring, in particular to a circuit breaker state monitoring system based on opening and closing coil currents. Background technique [0002] The circuit breaker is an important device in the power system, and its reliability is related to the operation stability of the entire power grid. The improvement of distribution network automation puts forward higher and higher requirements for the reliability of the circuit breaker itself. At present, the operating environment of substation equipment is not optimistic, and circuit breaker opening and closing failures occur from time to time, including when the operating circuit breaker is in the closing state, the closing circuit cannot be warned in time when the closing circuit fails, resulting in reclosing action when transient faults occur The circuit breaker fails to close; there are also cases where the backup circuit breaker is in the ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 李宾宾柯艳国田宇程登峰朱太云杨为朱胜龙罗沙叶剑涛
Owner STATE GRID CORP OF CHINA
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