Disconnection monitoring system of breaker closing control circuit

Abstract

The invention discloses a disconnection monitoring system of a breaker closing control circuit. The system comprises a DC power supply, a microcomputer protection, measurement and control device, a work position auxiliary contact of a handcart type breaker, an auxiliary contact of a breaker, an energy-storage auxiliary contact of a spring and a closing coil, and whether the closing loop is well can be known timely according to ON/OFF of a tripping monitoring green lamp of the protection, measurement and control device. The auxiliary contacts are used to control the loop, and ON/OFF information that the handcart type breaker is not in the work position, the breaker is in the opening position and the spring does not store energy is transmitted to the microcomputer protection, measurement and control device. When one or multiple external closing conditions of the breaker closing control loop are not satisfied, the DC power supply connects corresponding auxiliary contacts to the microcomputer protection, measurement and control device, and a person on duty can check fault alarm information from the microcomputer protection, measurement and control device. Thus, the fault reason of the closing control loop can be obtained in real time, effective measures are timely adopted, and it is ensured that the breaker is closed rapidly.

Description

technical field [0001] The invention relates to the technical field of a circuit breaker control circuit, in particular to a circuit breaker closing control circuit disconnection monitoring system. Background technique [0002] In the substation, the circuit breaker is an important part of the power system. Whether the circuit breaker closing control circuit is intact or not directly affects whether the operation and protection commands can be correctly executed, and is related to the safe and stable operation of the power system. When there is a fault point in the circuit breaker closing control circuit, it will cause the circuit breaker to fail to close normally. At this time, it is necessary to find out the fault point and repair it according to the prompt of the alarm system in the monitoring circuit, so that the circuit breaker can be closed normally and smoothly, ensuring power supply reliability. [0003] The conventional method of monitoring the integrity of the clo...

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Problems solved by technology

[0004] However, the above circuit breaker control loop disconnection monitoring method can only monitor the fault of the entire closing control loop for the closing control lo...

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