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A method, system, readable medium and device for determining the insulation state of a support capacitor

A technology for supporting capacitance and insulation state, which is applied in the directions of measuring electricity, measuring electric variables, and testing dielectric strength, etc. It can solve the problems of safe and reliable operation of traction converters, poor detection effect, and no attention, etc., to improve equipment Asset utilization, avoiding insulation breakdown, and ensuring reliable operation

Active Publication Date: 2022-05-10
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, as far as the inventors know, the evaluation methods for the insulation status of the supporting capacitors of the traction converter are still relatively scarce, and the detection effect is poor, and the main research has not paid attention to this problem, which has caused serious damage to the safe and reliable operation of the traction converter. great trouble

Method used

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  • A method, system, readable medium and device for determining the insulation state of a support capacitor
  • A method, system, readable medium and device for determining the insulation state of a support capacitor
  • A method, system, readable medium and device for determining the insulation state of a support capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for determining the insulation state of a supporting capacitor is provided, comprising the following steps:

[0047] Obtain the partial discharge test results of the measured support capacitor, and obtain the discharge capacity-phase spectrum at different levels of voltage;

[0048] Calculate the kurtosis of the discharge capacity-phase spectrum at all levels of voltage, and then calculate the corresponding kurtosis coefficient;

[0049] Calculate the insulation state evaluation parameters according to the discharge amount at each level of voltage - the kurtosis coefficient of the phase spectrum, compare the parameter values ​​with the preset thresholds of different working conditions, and determine the insulation state of the measured supporting capacitor according to the comparison results working conditions.

[0050] Partial discharge test of the supporting capacitor under test, using the step-up method to pressurize the supporting capacitor under test. In...

Embodiment 2

[0065] A support capacitor insulation state determination system is provided, comprising:

[0066] A module used to obtain the partial discharge test results of the measured supporting capacitor, and obtain the discharge capacity-phase spectrum at different levels of voltage;

[0067] A module for calculating the kurtosis of the discharge capacity-phase spectrum at all levels of voltage, and calculating the corresponding kurtosis coefficient;

[0068] A module for calculating the insulation state evaluation parameters according to the kurtosis coefficient of the discharge capacity-phase spectrum at all levels of voltage;

[0069] A module for comparing the parameter value with preset thresholds for different working conditions, and determining the working condition of the insulation state of the measured support capacitor according to the comparison result.

[0070] Certainly, in some embodiments, a partial discharge test system is also included, the partial discharge test sy...

Embodiment 3

[0072] A computer-readable storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor of a terminal device and executing the steps in the method for determining the insulation state of a supporting capacitor in Embodiment 1.

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Abstract

The invention provides a method, system, readable medium and equipment for determining the insulation state of a supporting capacitor, obtains the partial discharge test results of the measured supporting capacitor, and obtains the discharge amount-phase spectrum at different levels of voltage; According to the discharge amount at each level of voltage - the kurtosis coefficient of the phase spectrum, the insulation state evaluation parameter is calculated, and the parameter value is compared with the preset The thresholds of different working conditions are compared, and the working condition of the insulation state of the measured support capacitor is determined according to the comparison result; the invention can realize the determination of the insulation state of the support capacitor, in order to judge whether the support capacitor continues to run after long-term operation under actual working conditions Provide some reference.

Description

technical field [0001] The invention belongs to the technical field of capacitor insulation performance evaluation, and in particular relates to a method, system, readable medium and equipment for determining the insulation state of a supporting capacitor. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] As the supporting capacitor of the traction converter, the main function of the capacitor is to stabilize the intermediate DC voltage, provide instantaneous energy exchange, and realize the exchange of reactive power with the power source and the load. The support capacitor is an indispensable and important part of the traction converter of the vehicle (such as the EMU). However, due to factors such as the environment and the manufacturing process, defects will be formed inside the capacitor, which will easily cause partial discharge. With ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 王海涛杨盼奎史小利万国强梁爽王明岩江斌王大奎
Owner CRRC QINGDAO SIFANG CO LTD
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