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A circuit breaker control loop design method capable of realizing circuit breaker control loop bidirectional monitoring

A control circuit and design method technology, applied in the direction of protection switch operation/release mechanism, etc., can solve the problems of reducing the reliability of power supply for users, the failure of circuit breakers to close normally, hidden dangers of grid operation stability, etc., and achieve the effect of increasing the conversion time

Active Publication Date: 2018-07-27
MAINTENANCE BRANCH OF STATE GRID HEBEI ELECTRIC POWER
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  • Abstract
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AI Technical Summary

Problems solved by technology

In the case of the above defects, when the line fault occurs during the closing operation of the power grid, after the protection device trips the circuit breaker to remove the fault, after the reclosing device issues a closing command, due to a disconnection fault in the closing control circuit, the circuit breaker cannot Normal closing, which brings hidden dangers to the stability of power grid operation and reduces the reliability of power supply to users

Method used

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  • A circuit breaker control loop design method capable of realizing circuit breaker control loop bidirectional monitoring
  • A circuit breaker control loop design method capable of realizing circuit breaker control loop bidirectional monitoring
  • A circuit breaker control loop design method capable of realizing circuit breaker control loop bidirectional monitoring

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with accompanying drawing.

[0039] Such as figure 2 As shown, the circuit breaker auxiliary contact transfer device of the embodiment includes a circuit breaker auxiliary transfer switch 1 , a spring 2 and a transmission link 3 . One end of the transmission link 3 is externally connected to the main contact drive shaft of the circuit breaker, the other end of the transmission link 3 is connected to one end of the spring 2, and the other end of the spring 2 is connected to the contact of the circuit breaker auxiliary switch 1. Under the action of the transmission link 3, the spring 2 drives the contact of the auxiliary transfer switch 1 of the circuit breaker to the end point for 50ms to 5s. The circuit breaker auxiliary contact switching device is different from the traditional mechanical linkage to drive the circuit breaker auxiliary switching device. The circuit breaker auxiliary contact switching...

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Abstract

The present invention relates to the technical field of circuit breakers and particularly relates to a breaker control circuit design method capable of realizing the bidirectional supervision function for the control circuit of a breaker. According to the technical scheme of the invention, the auxiliary contact 52b of a breaker switch-on control circuit is connected in parallel with a time-delay contact 52A. The auxiliary contact 52a of a breaker switch-off control circuit is connected in parallel with a time-delay contact 52B. In this way, no matter the breaker is in the switch-on state or in the switch-off state, the monitoring function of the breaker switch-off control circuit and the monitoring function of the breaker switch-on control circuit are realized at the same time.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a circuit breaker control loop design method capable of realizing bidirectional monitoring of the circuit breaker control loop. Background technique [0002] Current design methods for circuit breaker control loops (such as figure 1 shown), the basic principle is that during the closing operation of the circuit breaker, the integrity of the two sets of trip circuits of the circuit breaker can be monitored through the intermediate HWJ relay, and the integrity of the closing circuit cannot be monitored at this time; during the opening period of the circuit breaker, through the intermediate The relay TWJ monitors the integrity of its closing circuit, and cannot monitor the integrity of the tripping circuit at this time. From the point of view of actual operation, during the closing operation of the circuit breaker, the defect of recessive closing control circuit disconnect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/10
CPCH01H71/10
Inventor 张惠山付炜平刘海锋
Owner MAINTENANCE BRANCH OF STATE GRID HEBEI ELECTRIC POWER
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