State comprehensive evaluation method for high-voltage circuit breaker operating mechanism based on switching-on and switching-off coil currents

A high-voltage circuit breaker and operating mechanism technology, which is applied in the field of comprehensive evaluation of the state of the high-voltage circuit breaker operating mechanism, can solve the problems of many parts, frequent actions, and high failure rate of mechanical parts

Active Publication Date: 2016-10-12
SICHUAN UNIV
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Problems solved by technology

Compared with other electrical equipment, high-voltage circuit breakers have more mechanical parts, and these parts operate frequently, so the failure rate of mechanical parts of high-voltage circuit breakers is relatively high

Method used

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  • State comprehensive evaluation method for high-voltage circuit breaker operating mechanism based on switching-on and switching-off coil currents
  • State comprehensive evaluation method for high-voltage circuit breaker operating mechanism based on switching-on and switching-off coil currents
  • State comprehensive evaluation method for high-voltage circuit breaker operating mechanism based on switching-on and switching-off coil currents

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Experimental program
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Embodiment 1

[0060] In order to test the status evaluation network of the high-voltage circuit breaker operating mechanism, a high-voltage circuit breaker operating mechanism manufacturer conducts a test under the unrated condition of the high-voltage circuit breaker, and takes the high-voltage circuit breaker spring operating mechanism of model LW34-40.5 as the research object. The characteristic quantity of coil current after data processing by the five-point cubic smoothing filter method is extracted as the characteristic quantity of the state evaluation of the operating mechanism. Table 3-3 is the extracted closing coil current test sample feature quantity and the corresponding state type of the operating mechanism of the high-voltage circuit breaker;

[0061] A total of 30 sets of sample data were extracted for the coil current feature quantity. There are 6 states of the operating mechanism of the high-voltage circuit breaker that can be represented, including 5 groups of normal mechan...

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Abstract

The invention relates to a state comprehensive evaluation method for a high-voltage circuit breaker operating mechanism based on switching-on and switching-off coil currents. The method comprises the steps: firstly removing an interference signal in a coil current signal through employing a five-point cubic smoothening filtering; secondly extracting a coil current characteristic value, and building an evaluation system model. The method can achieve the accurate evaluation of the state of the high-voltage circuit breaker operating mechanism, and is of great significance to a maintainer for making a maintenance plan.

Description

technical field [0001] The invention designs a method for comprehensively evaluating the state of an operating mechanism of a high-voltage circuit breaker based on the opening and closing coil current. Background technique [0002] The normal operation of high-voltage circuit breakers plays a very important role in ensuring the safe and stable operation of the power system. Therefore, in order to ensure the normal operation of the high-voltage circuit breaker, the power grid company has formulated a strict maintenance plan, that is, preventive overhaul and minor repair of the high-voltage circuit breaker on a regular basis. According to relevant statistics, the preventive maintenance of high-voltage circuit breakers consumes more than half of the maintenance costs of substations, and most of the costs are spent on routine maintenance of high-voltage circuit breakers; [0003] The safe and stable operation of high-voltage circuit breakers depends largely on the operational r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3272
Inventor 赵莉华荣强张浩王释颖付荣荣牛帅杰冯政松牛纯春丰瑶刘丹华
Owner SICHUAN UNIV
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