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State detection and protection method for circuit breaker opening and closing coil

A technology for opening and closing coils and state detection, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as tripping and closing coil burning, and achieve the effect of reliably cutting off the circuit, significant economic benefits, and reducing workload.

Active Publication Date: 2013-11-27
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention develops a tripping and closing coil monitoring and protection device to avoid the problem of tripping and closing coils being burned

Method used

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  • State detection and protection method for circuit breaker opening and closing coil
  • State detection and protection method for circuit breaker opening and closing coil
  • State detection and protection method for circuit breaker opening and closing coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] (one)

[0027] (1) Measure the DC current of the opening and closing coil circuit through the Hall sensor

[0028] Calculate the heating value of the opening and closing coil according to the magnitude of the collected DC current to reach the limit value of coil heating, and separate the opening and closing coil circuit through the circuit combined with the power electronic component IGBT and the relay to achieve the function of protecting the opening and closing coil. The device records waves for each protection startup and opening and closing coil protection, providing data support for coil fault analysis. The device counts the operation times of the opening and closing coils according to the current changes of the opening and closing coils and the changes of the auxiliary contacts, so as to provide a theoretical basis for the inspection and maintenance of the opening and closing coils of circuit breakers.

[0029] (2) Calculate the heating value of the opening and ...

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PUM

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Abstract

The invention discloses a state detection and protection method for a circuit breaker opening and closing coil. The invention provides a state detection and protection system for a circuit breaker opening and closing coil, deduces a coil equivalent heating formula through theoretical calculation and coil opening and closing material analysis, and achieves the purpose of protecting the coil by cutting off the electrified loop before the coil reaches a heat melting point through the calculation of heat productivity. IGBT power electronic components are easy to damage after long-term operation, the service life of an IGBT is prolonged by combining with a relay, and the purpose of performing reliable operation and cutting off a loop reliably can be achieved; a theoretical basis is provided for the circuit breaker maintenance; the safe reliability of the circuit breaker opening and closing coil is improved; the safe operation capability of a transformer substation can be effectively improved, the field maintenance workload can be effectively reduced, and the economic benefit is remarkable; and the state detection and protection method guarantees the safe and economical operation of the transformer substation system, and improves the power supply reliability of the transformer substation.

Description

technical field [0001] The invention relates to a circuit breaker opening and closing coil state detection and protection system, which belongs to the technical field of power system protection and control. Background technique [0002] Accidents of tripping and closing coils burning out often occur during power system operation. As we all know, tripping and closing coils are designed according to short-time energization. The burning of the tripping and closing coils is mainly due to the fact that the current of the tripping and closing coils cannot be cut off normally, which leads to the long-term energization of the tripping and closing coils. As an important electrical component in the power system, when the power system fails, the circuit breaker accepts the trip command of the relay protection and the automatic device, and requires it to perform the trip action at a millisecond speed to avoid the spread and expansion of the accident. Therefore, it is required that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/22
Inventor 邹展陈英传仇激文滕俊许炜
Owner STATE GRID CORP OF CHINA
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