基于PD信号提取的干式空心电抗器早期故障研究  

Research on forepart faults of dry-type air-core reactors based on the extraction of PD signals

作　　者：周力行[1] 李毅[1] 龚杰[1] 杨鑫[1] 罗旖旎[1] 郭秀勇[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410076

出　　处：《电力科学与技术学报》2008年第2期41-45,50,共6页Journal of Electric Power Science And Technology

基　　金：湖南省自然科学基金(04JJ40034)

摘　　要：在分析干式空心电抗器表面放电和匝间短路故障形成原因的基础上,通过在实验室对表面经轻微灼烧后的环氧树脂板的局放试验来模拟包封层表面放电现象,提出了一种通过从强干扰信号中利用自适应LMS算法滤波和小波包滤波联合去噪的方法,进而利用匝间局部放电信号来识别故障.通过对早期局放故障的识别来防止干式电抗器恶性故障的发生.Based on analysis of mechanism of surface discharge and interturn short circuit faults of Dry- Type Air-Core Reactors （DTACR）, the paper proposes a laboratory partial discharge （PD） tests using slight cauterant epoxy resin as insulating material to simulate the creeping-discharge phenomenon occurred on the surface of DTACR. A new method integrating self-adaptive filter algorithm and wavelet packet filter algorithm is presented, which can reduce noise and extract the original PD from the signals with strong noise and disturbance. Thereafter, the faults can be recognized by detecting the PD signals and the vicious accidents can be prevented by detection of forepart PD faults of DTACR.

关 键 词：干式空心电抗器 环氧树脂 LMS算法 小波包滤波 局部放电 

分 类 号：TM406[电气工程—电器]