Contact ablation fault estimation method of high-voltage circuit breaker

Abstract

The invention relates to the field of circuit breaker diagnosis, and particularly discloses a contact ablation fault estimation method of a high-voltage circuit breaker. The contact ablation fault estimation method comprises the steps of acquiring a range-time curve of the circuit breaker; obtaining a resistance-range curve according to a resistance-time curve and the range-time curve; acquiring acontact ablation state parameter numerical value of the circuit breaker according to each resistance-range curve; optimizing a parameter of a support vector machine by particle swarm optimization toobtain an optimal parameter, and building an optimal non-linear support vector machine by employing the optimal parameter; building sample data; training the optimal non-linear support vector machineby employing the sample data, inputting the resistance-range curve, and outputting the corresponding contact ablation state parameter numerical value to obtain the non-linear support vector machine capable of estimation; and forecasting the resistance-range curve of the circuit breaker to be estimated by employing the trained non-linear support vector machine. By the method, the contact ablation fault of the high-voltage circuit breaker can be accurately estimated.

Description

technical field [0001] The invention belongs to the field of high-voltage circuit breaker diagnosis, in particular to a high-voltage circuit breaker contact ablation failure evaluation method. Background technique [0002] The contact resistance generated during the movement of the contacts of the electrical switch or the contact resistance generated when working in a vibrating environment is reflected as dynamic contact resistance. Its characteristics are the true reflection and embodiment of the electrical contact state on the surface of the electrical contact, so it can be used as The main basis for the evaluation of electrical contacts. [0003] The contact pair of the high-voltage circuit breaker is mainly composed of the main contact and the arc contact in parallel. The main contact carries the rated working current, and the arc contact bears the arc burn. The state of arcing contacts is the most important factor affecting the electrical life of high voltage circuit b...

AI Technical Summary

Problems solved by technology

[0005] For example, the patent document with the application number 201710953217.8 discloses a neural network-based method for evaluating the ablation state of the arc contact of a circuit breaker. It discloses that the neural network algorithm is used to evaluate and judge the ablation state of the arc contact. If the time is too long, the efficiency is not high, and it may fall into a local minimum, resulting in problems such as low accuracy

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