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GIS不同耦合方式下注入脉冲的加权IMF局放信号等效性

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  • 国家科技期刊平台
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注入脉冲模拟局放是气体绝缘金属封闭组合电器(gas insulated switchgear,GIS)特高频(ultra high frequency,UHF)局放监测装置功能校验的主要方法,由于现场校验脉冲注入的辆合方式不同,模拟局放与实际局放等效性规律尚不明确,无法保证监测装置功能校验的有效性.文中首先建立126 kV GIS典型局放缺陷(尖端、悬浮、绝缘子气泡)和内/外置式脉冲注入UHF局放检测平台,并对UHF信号有效脉冲进行归一化提取;接着提出基于经验模态分解的加权本征模函数(intrinsic mode functions,IMF)信号处理方法,通过计算局放信号欧式距离平均值和最大值表征其等效性;最后与常规信号偏差法进行对比验证.研究表明,相较于常规信号等效性分析方法,加权IMF法可有效解决UHF信号波形局部差异较大的问题;使用内置传感器脉冲注入的模拟局放信号与悬浮局放信号等效性最高,局放信号的欧式距离平均值Me和最大值Ma分别为3.82％和10.28％.因此,UHF监测装置功能校验可采用恒定参数注入脉冲代替悬浮缺陷,且模拟局放可优先选择内置UHF传感器注入脉冲.文中研究可为UHF局放监测装置功能校验的脉冲注入方法提供参考.
The equivalence of weighted IMF partial discharge signals pulse injection by different coupling modes in GIS
Pulse injection to simulate partial discharge(PD)is the main method for functional verification of gas insulated switchgear(GIS)ultra high frequency(UHF)PD monitoring device.Due to the different coupling modes of pulse injection in field verification,the equivalence law between simulated PD and actual PD is not clear,and the effectiveness of functional verification of monitoring device cannot be guaranteed.In this paper,a typical PD defect(tip,suspension,insulator bubble)and internal/external pulse injection UHF PD detection platform for 126 kV GIS are established,and the effective pulses of UHF signals are normalized and extracted.Then a signal processing method of weighted intrinsic mode functions(IMF)based on empirical mode decomposition is proposed.The signal equivalence is characterized by calculating the average and maximum values of the Euclidean distance of the signal,and finally compared with the conventional signal deviation method.The research shows that compared with the conventional signal equivalence analysis method,the weighted IMF method can effectively solve the problem of large local difference of UHF signal waveform.The internal sensor pulse injection analog PD and suspended PD have the highest equivalence.The average value Me and the maximum value Ma of Euclidean distance are 3.82％and 10.28％,respectively.Therefore,the function verification of UHF monitoring device can use constant parameter pulse injection instead of suspension defect,and the internal UHF sensor injection can be preferred for analog PD.The research in this paper can provide reference for the pulse injection method for the function verification of UHF PD monitoring device.

pulse injectionpartial discharge simulationempirical mode decompositionsignal equivalence analysisintrinsic mode functions(IMF)Euclidean distance

董冰冰、李康、高常胜、刘贯科、戴喜良、夏云峰

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合肥工业大学电气与自动化工程学院,安徽合肥 230009

广东电网有限责任公司东莞供电局,广东东莞 523008

海南电网有限责任公司输电运检分公司,海南海口 570100

注入脉冲 局放模拟 经验模态分解 信号等效性分析 本征模函数(IMF) 欧式距离

国家自然科学基金资助项目高等学校学科创新引智计划资助项目

52107142BP0719039

2024

10.12158/j.2096-3203.2024.04.010

电力工程技术
江苏省电力公司 江苏省电机工程学会

电力工程技术

CSTPCD北大核心
影响因子：0.969
ISSN：2096-3203
年,卷(期)：2024.43(4)
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