Empirical Cumulative Distribution Function of TEV PD Levels of HV Switchgear

NING Yu; XIONG Jun

doi:10.13296/j.1001-1609.hva.2019.02.011

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Empirical Cumulative Distribution Function of TEV PD Levels of HV Switchgear

更新时间：2025-04-26

- Empirical Cumulative Distribution Function of TEV PD Levels of HV Switchgear
- High VoltageApparatus Vol. 55, Issue 2, Pages: 77-84(2019)
- 作者机构：
  
  南方电网广州供电局有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2019.02.011
  CLC： TM591
- Published：2019
- 稿件说明：
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[1]宁宇,熊俊.高压开关柜局部放电地电波幅值的经验累计分布特性[J].高压电器,2019,55(02):77-84.

NING Yu, XIONG Jun. Empirical Cumulative Distribution Function of TEV PD Levels of HV Switchgear[J]. High voltageapparatus, 2019, 55(2): 77-84.
[1]宁宇,熊俊.高压开关柜局部放电地电波幅值的经验累计分布特性[J].高压电器,2019,55(02):77-84. DOI： 10.13296/j.1001-1609.hva.2019.02.011.

NING Yu, XIONG Jun. Empirical Cumulative Distribution Function of TEV PD Levels of HV Switchgear[J]. High voltageapparatus, 2019, 55(2): 77-84. DOI： 10.13296/j.1001-1609.hva.2019.02.011.

摘要

研究局部放电地电波幅值的分布特性有利于提高开关柜局放状态判断的准确性。文中以36 628组在运行高压开关柜局放实测数据为分析对象

建立了高压开关柜局部放电地电波法现场测试值的经验累计分布特性

其概率密度函数符合Gamma分布特征。并且

统计得出本地区数据库中分布概率超过5%、10%、25%地电波测试值样本分布所对应的经验阈值分别为32、23、13 dB。分析表明

环境湿度、运行时间及柜体结构等7个因素对经验累计分布特性影响较大。上述结果为掌握高压开关柜绝缘健康水平及采取有效的运维策略提供了思路和建议。

Abstract

It is beneficial to guide state judgment of HV switchgear and improve their insulation state detection accuracy through the study of distribution characteristics of partial discharge wave detection.In this paper

36 628 partial discharge data of HV switchgear are analyzed

and a series of novel empirical cumulative distribution functions（ECDFs）based on on-site transient earth voltage（TEV）data of HV switchgear is proposed

whose probability density function（PDF）meet the Gamma distribution.According to the distribution criteria of 5%

10%and 25%

the local empirical thresholds of TEV data which exceeded 5%

10%and 25%are 32 dB、23 dB and 13 dB.In addition

a total of 11 factors includes test site

test environment

run time and switch cabinet structure are researched to analyze the influences to ECDFs.The result shows that

7 factors of humidity

run time and the cabinet structure to experience a greater impact on the cumulative distribution

it provides ideas and suggestions for mastering the HV switchgear insulation health and taking effective operation and maintenance strategy.

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