Neural network-based method for evaluating ablation states of arcing contacts of circuit breakers

Abstract

The invention discloses a neural network-based method for evaluating ablation states of arcing contacts of circuit breakers. The method comprises the steps of loading detection current to contacts ofone sample circuit breaker and obtaining a relationship curve of dynamic contact resistance of the contacts and travels of the contacts; forming a circuit breaker ablation state parameter sample by using a group of contact ablation evaluation parameters and corresponding contact state parameters; obtaining a plurality of circuit breaker ablation state parameter samples to train a neural network system; obtaining relationship curve parameters of the dynamic contact resistance of to-be-detected contacts and the travels of the to-be-detected contacts; and inputting contact ablation evaluation parameters of the to-be-detected contacts into a trained neural network and obtaining contact state parameters of the to-be-detected circuit breaker, thereby achieving evaluation of the ablation states of the arcing contacts of the to-be-detected circuit breaker. According to the method disclosed by the invention, a BP evaluation network model is established on the basis of a plurality of dynamic contact resistance parameters of the arcing contacts, and the method can be applied to evaluation and prediction of the ablation degrees of the arcing contacts of SF6 circuit breakers, and is accurate inresult and small in error.

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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