A Comprehensive Evaluation Method for Circuit Breaker Operating Mechanism

Abstract

The embodiment of the invention discloses a method for comprehensive evaluation of the operating mechanism of a circuit breaker, which includes making a standard current curve, processing the sampled current curve, calculating the uncorrelated coefficient between the sampled current curve and the standard current curve, and determining the uncorrelated The coefficient and the weight vector of the risk of the operating mechanism, using the uncorrelated coefficient and the weight vector to calculate the risk assessment coefficient of the operating mechanism. The present invention calculates the degree of irrelevance between the sampling current-time curve and the standard current-time curve in the form of segmented comparison, the evaluation result is more accurate, and the application range is wider, and the relationship between the degree of irrelevance and the failure of the operating mechanism is established by using the analytic hierarchy process The relative importance of risks makes the evaluation result closer to the real situation. The obtained risk evaluation coefficient of the circuit breaker operating mechanism is an early warning value. The risk evaluation coefficient is graded through the test data to effectively predict the possibility of future failure of the operating mechanism. sex.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of circuit breaker fault detection and diagnosis, and in particular to a comprehensive evaluation method for an operating mechanism of a circuit breaker. Background technique [0002] High-voltage circuit breakers are important protection and control equipment for power systems. Their operational reliability directly affects the reliability of power grid operations. The reliable operation of high-voltage circuit breakers plays a vital role in the normal operation of power systems. Therefore, the high-voltage circuit breakers Fault detection and diagnosis are particularly important. The existing evaluation method for fault detection and diagnosis of high-voltage circuit breakers takes the working environment of the entire high-voltage circuit breaker, external risks, outage losses, operating data of each structure in the high-voltage circuit breaker, failure probability, and maintena...

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Problems solved by technology

[0006] For this reason, the embodiment of the present invention provides a method for comprehensive evaluation of the operating mechanism of a circuit breaker to solve the problems in the prior art that the evaluation is inaccurate and the evaluation result lags due to too many evaluation parameters of the high-voltage circuit breaker

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