Circuit breaker state evaluation method

Abstract

The invention discloses a circuit breaker state evaluation method. The method comprises the steps: forming to-be-tested data for representing the characteristics of a circuit breaker through the characteristic time points of a circuit breaker closing current curve; obtaining the data of the circuit breaker with a fault and the type of the fault, and dividing the data into three fault data clusters; calculating the relative proximity of the to-be-tested data and the fault data clusters according to the big data clustering idea, and dividing device states into a healthy state, a latent fault state or a fault state; judging the fault type of the device with the fault based on the above, and calculating a health score of health equipment based on a fault type correlation weight, and obtainingthe predicted fault development time of a latent fault device through a time series similarity analysis method. The method can predict the time of transition of a state to the fault state more accurately, can achieve the finding of a hidden risk of the device before the fault occurs, and facilitates the early detection and resolution of equipment hazards.

Description

technical field [0001] The invention relates to the technical field of power system equipment reliability analysis, in particular to a circuit breaker state evaluation method. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are severely overloaded, short-circuited, or under-voltage. Its function is equivalent to a fuse-type switch. The combination with overheating and underheating relays is widely used in power systems. [0003] The reliability of circuit breaker performanc...

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Problems solved by technology

[0004] For this reason, the purpose of the present invention is to propose a circuit breaker state evaluation method, which solves the problem that the prior art cannot characterize the potential fault situation of the circuit breaker, nor can it determine the trend of the circuit breaker to the fault state transformation

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