Circuit breaker action behavior analysis device based on thermal effect and electrical characteristic quantity

Abstract

The invention discloses a circuit breaker action behavior analysis device based on thermal effect and electrical characteristic quantity, comprising a sensor assembly, a signal collection module, anda behavior analysis module. The sensor assembly comprises a current sensor and a temperature sensor, wherein the current sensor is nested in a circuit breaker trip coil, the temperature sensor is attached to the surface of the circuit breaker trip coil, and the current sensor and the temperature sensor output signals by using a serial port. The signal collection module is configured to acquire signals collected by the current sensor and the temperature sensor, and the state of the protection and auxiliary contacts of the circuit breaker. The behavior analysis module is configured to analyze the tripping behavior and make intelligent judgments by using the expert knowledge base of circuit breaker tripping. According to the circuit breaker action behavior analysis device based on thermal effect and electrical characteristic quantity, quick analysis and judgment of circuit breaker actions are realized, the working operation of the original circuit breaker is not influenced, the maintenance analysis time of the maintainers on the circuit breaker is shortened, and the maintenance efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power safety, and in particular relates to a circuit breaker action behavior analysis technology. Background technique [0002] The circuit breaker is an extremely important primary device in the power system. It is mainly used to switch on or off the normal working current, short-circuit current and overload current of the circuit, and has the function of extinguishing the arc. When the power system fails, the circuit breaker cooperates with other protection devices to quickly remove the faulty equipment in the system, protect other electrical equipment in the power system from being affected, and achieve the purpose of reducing the scope of power outages and preventing the expansion of accidents. When the circuit breaker refuses to operate due to the burnt coil, the circuit breaker will not be able to cut off the faulty line, which will directly cause the upper level of protection to trip to cu...

AI Technical Summary

Problems solved by technology

When the circuit breaker refuses to operate due to the burnt coil, the circuit breaker will not be able to cut off the faulty line, which will directly cause the upper level of protection to trip to cut off the fault, so that the stable and good running line will be cut off for no reason, resulting in the expansion of the power outage and causing large-scale failures. area blackout

[0003] The trip coil is one of the most important components of the circuit breaker (switch). During the operation of the circuit breaker, faults such as the burning of the trip coil often occur, resulting in the phenomenon of refusal to trip, resulting in the circuit breaker not acting when it is in action.

Faults such as burning out of the tripping coil are usually caused by the jamming of the actuator in the circuit breaker, the adhesion of the coil control circuit contacts and the inability to disconnect the auxiliary switch node, etc., which make the coil in the energized state for a long time, and the coil generates heat and burns out. , eventually causing the circuit breaker to fail to trip in time

[0004] Therefore, on-line monitoring of the operating status of the circuit breaker trip coil, real-time access to the operating status of the trip coil, grasping possible fault information, and quickly judging whether it is an abnormal trip when the circuit breaker trips, has become an important tool for circuit breaker trip coil maintenance. At present, there is no relevant device for circuit breaker action behavior analysis on the market. The development of this device can fill the gap in circuit breaker maintenance and greatly improve the efficiency of circuit breaker maintenance.

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