Device and method for predicting electric remaining service life of circuit breaker

Abstract

The invention discloses a device and a method for predicting the electric remaining service life of a circuit breaker. The device comprises a circuit breaker, a signal acquisition module, an analogue-to-digital (A / D)converter, a processor, an inverter circuit, an industrial personal computer and a transmission module, wherein the signal acquired by the signal acquisition module is output to the input end of the A / D converter; the output end of the A / D converter is connected with the input / output (IO) ports of the processor; a data conversion pin of the inverter circuit is connected with a serial port of the processor; and the input end of the industrial personal computer and the input end of the transmission module are both connected with the serial port of the processor. By the method, the closing time, the over-voltage, the on-off current, the environment air pressure, the use times and the insulation coefficients of the circuit breaker are measured directly; and the data are used as the input quantity; and the prediction of the service life of the circuit breaker is realized by using the A / D converter, the processor, the inverter circuit, the industrial personal computer and the transmission module; the error generated due to the fact that a mold is established and parameters are selected by using a traditional method is avoided; and the method is simple in input quantity extraction, precise and high in prediction efficiency.

Description

Technical field [0001] The invention belongs to the technical field of circuit breakers, and particularly relates to a device and method for predicting the remaining electrical service life of a circuit breaker. Background technique [0002] Relevant statistics show that more than half of the maintenance costs of substations are spent on switches, and 60% of them are spent on minor repairs and routine maintenance of circuit breakers; in addition, according to statistics, 10% of circuit breaker failures are due to incorrect maintenance. As a result, the overhaul of the circuit breaker is completely dismantled, which is time-consuming and costly, up to 1 / 3-1 / 2 of the entire circuit breaker, and the disassembly and reassembly will cause many defects. Examples of accidents caused by this The list goes on. Which components (or important components) of the circuit breaker need to be replaced and how long it will run is still a controversial issue. In fact, in the current conservative ...

AI Technical Summary

Problems solved by technology

[0002] Relevant statistics show that more than half of the substation maintenance costs are spent on switches, and 60% of them are used for minor repairs and routine maintenance of circuit breakers; in addition, according to statistics, 10% of circuit breaker failures are due to incorrect maintenance. As a result, the overhaul of the circuit breaker is completely disassembled, which is time-consuming and expensive, up to 1 / 3-1 / 2 of the entire circuit breaker, and the disassembly and reassembly will cause many defects, and the resulting accident examples are even more Too many to list

Which parts (or important components) of the circuit breaker and how long they need to be replaced are still a controversial issue. In fact, in the current relatively conservative planned maintenance, it often happens that many parts still perform well when they are updated after many years of operation. , and due to failure to find out in time, a defect in a certain component will lead to power grid accidents from time to time

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