A comprehensive evaluation method for the state of high-voltage circuit breaker operating mechanism based on opening and closing coil current

A technology of high-voltage circuit breakers and opening and closing coils, which is applied to circuit breaker testing, instruments, and electrical measurement, and can solve the problems of many parts, frequent actions, and high failure rate of mechanical parts.

Active Publication Date: 2017-10-31
SICHUAN UNIV
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  • Abstract
  • Description
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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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  • A comprehensive evaluation method for the state of high-voltage circuit breaker operating mechanism based on opening and closing coil current
  • A comprehensive evaluation method for the state of high-voltage circuit breaker operating mechanism based on opening and closing coil current
  • A comprehensive evaluation method for the state of high-voltage circuit breaker operating mechanism based on opening and closing coil current

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Embodiment 1

[0060] In order to test the state evaluation network of the high-voltage circuit breaker operating mechanism, a high-voltage circuit breaker operating mechanism manufacturer conducted a high-voltage circuit breaker non-rated test, and the high-voltage circuit breaker spring operating mechanism model LW34-40.5 was the research object. The characteristic quantity of the coil current after the data processing of the five-point triple smoothing filtering method is extracted as the characteristic quantity of the state evaluation of the operating mechanism. Table 3-3 is the characteristic quantity of the extracted closing coil current test sample and the corresponding high-voltage circuit breaker operating mechanism state type;

[0061] A total of 30 sets of sample data are extracted for the characteristic quantities of coil currents. There are 6 states of high-voltage circuit breaker operating mechanism that can be characterized, including normal mechanism (A) 5 groups, coil voltage to...

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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 comprehensive evaluation method for the state of a high-voltage circuit breaker operating mechanism based on the current of the opening and closing coils. 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, regular preventive overhaul and minor repair of the high-voltage circuit breaker. 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 largely depends on the operational reliability of its ...

Claims

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Application Information

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Patent Type & Authority Patents(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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