Change-over switch integration circuit for circuit breaker of intelligent converting station

Abstract

The invention discloses a change-over switch integration circuit for a circuit breaker of an intelligent converting station. The change-over switch integration circuit comprises a change-over switch which is connected with the input end of an intelligent terminal, wherein the intelligent terminal is connected with a circuit breaker in a primary mechanism through a logic judgment contact; the circuit breaker comprises a closing coil; the closing coil of the circuit breaker is connected with a closing control loop of a monitoring background I; the closing control loop of the monitoring background I comprises a closing logic judgment contact of the intelligent terminal under the control of the monitoring background; and a closing logic judgment contact of the intelligent terminal under the control of a monitoring background II is connected in parallel to the monitoring background I. The invention has the beneficial effects: the intelligent mechanism is integrated with the change-over switch of the circuit breaker of the primary mechanism, redundant functional devices are eliminated, multiple sets of monitoring backgrounds correspond to mechanism closing at the future development stage of the intelligent converting station simultaneously, and the change-over switch integration circuit has long-term development trend and extensive application space.

Description

technical field [0001] The invention relates to a transfer switch integration circuit, in particular to an intelligent substation circuit breaker transfer switch integration circuit. Background technique [0002] In the smart substation, for the opening and closing control circuit of the circuit breaker, there are two sets of remote / local, closing / tripping transfer switches, and a set of transfer switches derived from the traditional secondary measurement and control device reserved for the relay room. By connecting with the intelligent terminal, the logical judgment contact of the intelligent terminal is used to control the opening and closing of the circuit breaker, that is, the "remote" transfer switch used in the relay room defined by the conventional substation; A transfer switch for circuit breakers, i.e. an "in situ" transfer switch for switchgear areas defined by conventional substations. The current situation is: [0003] 1. With the development of technology, the...

AI Technical Summary

Problems solved by technology

That is to say, in theory, in the same area, the transfer switch directly acting on the circuit breaker in the HSBC cabinet, that is, the power distribution device area defined by the conventional substation uses the "local" transfer switch to open and close the circuit breaker in series mode. , forming a situation of functional redundancy and repeated hardware equipment, which violates the guiding principle of smart substation integration; and when the operation and maintenance personnel work on the spot in the power distribution device area, they need to operate two sets of transfer switches in strict order and repeatedly, and the process is complicated , leading to an increase in the incidence of operational accidents

[0004] 2. In the current smart substation, the circuit breaker in the primary mechanism is only equipped with a combination brake coil, and a combination brake coil needs to correspond to a set of monitoring background. When there are more than one monitoring background, the existing circuit breaker opening and closing control circuit It is impossible to match multiple sets of monitoring backgrounds with a circuit breaker containing only one combination brake coil to meet the design requirements

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