Breaker energy storage spring abnormal state assessment system

Abstract

The invention discloses a breaker energy storage spring abnormal state assessment system. The system comprises a mechanical sensor, a data collection module, a remote telemetry alarm module, a database module and a background monitoring module, wherein the mechanical sensor is used for measuring a stress value of an energy storage spring in real time; the data collection module is used for converting stress value data of the energy storage spring into analog signal data; the remote telemetry alarm module is used for generating an abnormal state early-warning signal according to the stress value data and a preset stress threshold and sending the stress value data and the abnormal state early-warning signal, which are obtained through conversion by the data collection module, to the background monitoring module through an equipment control system of a substation; the database module is used for storing the stress value data received by the background monitoring module; and the backgroundmonitoring module is used for assessing the residual life of the energy storage spring when the abnormal state early-warning frequency is greater than a preset frequency threshold. Through the system, an existing communication circuit can be fully utilized to achieve the monitoring alarm function on a site by a background, the fault identification rate of the energy storage spring is increased, and a risk caused by a breaker accident to power grid safety is avoided.

Description

technical field [0001] The invention relates to the technical field of abnormal state monitoring and early warning of substation equipment, in particular to an evaluation system for abnormal state of a circuit breaker energy storage spring. Background technique [0002] The high-voltage circuit breaker is one of the important equipment in the power system. It plays the dual task of protection and control. Its operating status directly affects the safety and stability of the power grid system and the reliability of power supply. When it fails or an accident occurs, it will cause a grid accident. Or expand the accident, causing considerable economic and other losses. The spring operating mechanism has the advantages of reliable components, simple structure, convenient maintenance, etc., and its usage rate in high-voltage circuit breakers is getting higher and higher. The circuit breaker requires a certain amount of power whether it is opening or closing. The spring transmits ...

AI Technical Summary

Problems solved by technology

[0003] With the increase of the service time of the circuit breaker, the core components of the power - one point, the closing spring will have stress relaxation, fracture and other faults, which will directly lead to the decrease of the opening and closing speed of the circuit breaker, which will affect the arc extinguishing, and even refuse to move, resulting in further damage. serious accident

The current method of monitoring the energy storage state of the circuit breaker spring only monitors whether the closing energy storage spring is stored, but does not monitor whether the opening spring is stored energy, and the energy storage of the closing spring is only whether it is stored or not. It can judge the switching value, but it is impossible to judge whether the energy stored in the spring can meet the energy required for the opening and closing operation of the circuit breaker; or it is necessary to add a variety of sensors, such as pressure sensors, acceleration sensors, linear displacement sensors, grating sensors, conductive Plastic potentiometers and angular displacement sensors are not only not accurate enough, but also lack versatility for different circuit breaker models, and there is no independent logical judgment system, database system and real-time alarm device, and manual comparison and analysis of faults are still required , which not only reduces the monitoring efficiency, but also easily causes missed detection of fault signals

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