Method for detecting residual life of medium-voltage circuit breaker
A detection method and technology for circuit breakers, which are applied in circuit breaker testing, instruments, measuring electricity, etc., can solve problems such as a large number of detection data and unintuitive detection results, and achieve the effect of reducing adverse effects.
Pending Publication Date: 2022-06-03
KERUN ELECTRIC POWER TECH CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the problems in the prior art that the circuit breaker life detection data are numerous and the detection results are not intuitive, and provide a method for detecting the remaining life of a medium-voltage circuit breaker with a relatively accurate monitoring method and an intuitive detection result
Method used
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like figure 1 The shown method for detecting the remaining life of a medium voltage circuit breaker includes the following steps: S1: collecting the current curve of the circuit breaker opening and closing; The switch action time is the abscissa, the discrete current data is the ordinate, and the current curve of the circuit breaker opening and closing action is generated.
[0020] S2: Preprocess the current curve according to the working characteristics of the circuit breaker; including the following subdivision steps:
Step S21: performing zero point calibration processing on the current curve, and extracting the current curve between two zero point positions of the current curve during the opening and closing action of the circuit breaker as the effective current segment;
Step S22: According to the opening and closing action stages of the circuit breaker, extract the curve characteristics on the effective current segment, and divide the effective current segment into the f...
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The invention discloses a method for detecting the residual life of a medium-voltage circuit breaker, which comprises a circuit breaker body and a Hall current transformer arranged on a main circuit of the circuit breaker, and is characterized by comprising the following steps of: S1, collecting an opening and closing current curve of the circuit breaker; s2, preprocessing the current curve according to the working characteristics of the circuit breaker; s3, fitting the preprocessed current curve with a pre-stored curve to generate the similarity between the current curve and the pre-stored curve; s4, service life information of the circuit breaker is obtained through the similarity; and S5, displaying the service life information of the circuit breaker through sound and light. The change curve of the current waveform of the closing coil of the circuit breaker and the current of the closing and opening control coil in the action process of the circuit breaker, which are collected by the Hall sensor, contains a large amount of information of the working state of the circuit breaker, and can truly reflect the real working current state of the circuit breaker. And therefore, the fault problem can be found in time and can be solved exactly, and adverse effects caused by subsequent faults can be reduced.
Description
technical field [0001] The invention relates to a method, in particular, to a method for detecting the remaining life of a medium voltage circuit breaker. Background technique [0002] Medium voltage circuit breakers are important electrical equipment in power plants and substations. Medium voltage circuit breakers are used to make and break circuits under normal and fault conditions. When a short-circuit fault occurs in the circuit, the circuit breaker is started by the relay protection device to quickly cut off the fault short-circuit current and isolate the fault point, thereby ensuring that the operation of other circuits is not interrupted. Once it fails, the economic loss caused by it far exceeds its own value. Therefore, it is necessary to strengthen the monitoring of the state of the medium-voltage circuit breaker, and intuitively feedback the working state of the circuit breaker, so that the staff can repair or replace it in time, and improve the medium-voltage cir...
Claims
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Login to View More IPC IPC(8): G01R31/327
CPCG01R31/3272G01R31/3275
Inventor 王荣葛其运刘建华毛雄飞王琤璐
Owner KERUN ELECTRIC POWER TECH CO LTD