Reset circuit of total accident signal in relay protection circuit of microcomputer

Abstract

The invention provides an integrated accident signal resetting circuit in a microcomputer type relay protection circuit. The integrated accident signal resetting circuit comprises a five-prevention lock in a breaker control circuit, a control handle, an intermediate relay, a breaker operating circuit, a positive power supply, a negative power supply and a resetting button, wherein the positive power supply is electrically connected with the input end of the control handle through the five-prevention lock; a first opening output end of the control handle, a closing input end of the intermediate relay, and a closing input end of the breaker operating circuit are collinear; both a closing output end and an opening output end of the intermediate relay are connected with the negative power supply; No.1 and No.4 terminals of the resetting button, a second opening output end of the control handle and an opening input end of the intermediate relay are collinear; and No.2 terminal of the resetting button is connected with the positive power supply, and No.3 terminal is connected with an opening input end of the breaker operating circuit. By means of the integrated accident signal resetting circuit, a worker can reset integrated accident signals conveniently and quickly, accidents such as misoperation, misclassification operation and the like are not caused, and a substation can recover normal operation faster.

Description

technical field [0001] The invention relates to a return circuit of the general accident signal of a transformer substation, in particular to a return circuit of the general accident signal in a relay protection circuit of a microcomputer. Background technique [0002] In the microcomputer relay protection circuit of substation, the total accident signal is an important and commonly used monitoring signal. When the circuit breaker of the substation is disconnected due to fault tripping or stealth trip, the substation cannot work normally. Since the position of the circuit breaker operation control switch does not correspond to the actual position of the circuit breaker, when the circuit breaker in the substation is disconnected due to fault tripping or sneak tripping, etc., the relay protection circuit will send a general accident signal to the background monitoring system, indicating that the circuit breaker has occurred Faults require immediate query processing. Such as ...

AI Technical Summary

Problems solved by technology

The second kind of reset work on the accident master signal is only applicable to the fault of the circuit breaker bay which has been received and has entered the processing stage although the fault of the circuit breaker bay cannot be eliminated immediately and the circuit breaker bay cannot work normally. Reset the total accident signal, after reset the total accident signal, the total accident signal of all substations has been reset, and the substation can work normally at this time

The authorization procedure for unlocking the five-proof WF electronic system is very complicated and cumbersome

For example, the substation staff can use the method of short-circuiting the five anti-lock WF contacts for convenience to restore the general signal of the accident, but this method is an illegal operation, and this method can easily cause the circuit breaker to run at intervals and cause major accidents

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