A neural network-based method for evaluating the ablation state of arcing contacts of circuit breakers

Abstract

The invention discloses a neural network-based method for evaluating the ablation state of an arc contact of a circuit breaker, which includes loading a detection current on the contact of a sample circuit breaker to obtain a relationship curve between the dynamic contact resistance of the contact and the travel of the contact; The contact ablation evaluation parameters and the corresponding contact state parameters together form a circuit breaker ablation state parameter sample; obtain multiple circuit breaker ablation state parameter samples to train the neural network system; obtain the dynamic contact resistance and The relationship curve parameters of the travel of the contact to be tested; input the evaluation parameters of the contact ablation of the contact to be tested into the trained neural network to obtain the state parameters of the contact of the circuit breaker to be tested, and realize the ablation state of the arc contact of the circuit breaker to be tested to evaluate. The method of the technical solution of the present invention, based on the dynamic contact resistance parameters of multiple arcing contacts, establishes a BP evaluation network model, which can be used in SF 6 The evaluation and prediction of the ablation degree of the arcing contact of the circuit breaker, the result is accurate and the error is small.

Description

technical field [0001] The invention belongs to the field of electric facilities, and in particular relates to a method for evaluating the ablation state of an arc contact of a circuit breaker based on a neural network. Background technique [0002] SF 6 The circuit breaker is an important component in the power facility equipment. Its gas has excellent insulation and arc extinguishing performance, so that SF 6 The circuit breaker has the following advantages: strong breaking capacity, suitable for high breaking voltage, allowing more continuous breaking times, suitable for frequent operation, low noise, no fire hazard, small mechanical and electrical wear, etc., is a kind of excellent performance The "no maintenance" circuit breakers are used more and more in high voltage circuits. SF 6 The contact of the circuit breaker includes two parts, the main contact and the arc contact (according to the movement mode, the main contact is divided into a moving main contact and a s...

AI Technical Summary

Problems solved by technology

In view of the difficult operation and inaccurate measurement results of the existing measurement methods, in the technical solution of the present invention, only the dynamic contact resistance and the stroke curve section of the individual contact section of the arc contact are used as the evaluation data of the arc contact ablation, providing sufficient The samples are used to train the neural network, which can effectively improve the accuracy of arc contact ablation state detection

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