计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2014年
21期
4-7,110
,共5页
电力变压器%故障检测%核主元分析%特征样本
電力變壓器%故障檢測%覈主元分析%特徵樣本
전력변압기%고장검측%핵주원분석%특정양본
power transformer%fault detection%Kernel Principal Component Analysis(KPCA)%feature sample
针对核主元分析(KPCA)监控模型由于建模样本不纯而导致故障检测失效问题,提出基于改进特征样本方法的KPCA故障检测模型并应用于变压器故障检测中。利用特征值变化信息,设计出异常样本剔除算法以避免异常样本被选入特征样本集;采用特征样本方法提取建模样本集,建立KPCA监控模型,采用复合统计量对变压器运行状态进行检测,实验结果验证了改进特征样本算法的有效性,表明提出的方法具有较高的故障敏感性和检测效率。
針對覈主元分析(KPCA)鑑控模型由于建模樣本不純而導緻故障檢測失效問題,提齣基于改進特徵樣本方法的KPCA故障檢測模型併應用于變壓器故障檢測中。利用特徵值變化信息,設計齣異常樣本剔除算法以避免異常樣本被選入特徵樣本集;採用特徵樣本方法提取建模樣本集,建立KPCA鑑控模型,採用複閤統計量對變壓器運行狀態進行檢測,實驗結果驗證瞭改進特徵樣本算法的有效性,錶明提齣的方法具有較高的故障敏感性和檢測效率。
침대핵주원분석(KPCA)감공모형유우건모양본불순이도치고장검측실효문제,제출기우개진특정양본방법적KPCA고장검측모형병응용우변압기고장검측중。이용특정치변화신식,설계출이상양본척제산법이피면이상양본피선입특정양본집;채용특정양본방법제취건모양본집,건립KPCA감공모형,채용복합통계량대변압기운행상태진행검측,실험결과험증료개진특정양본산법적유효성,표명제출적방법구유교고적고장민감성화검측효솔。
In order to handle the invalidation problem of fault detection when Kernel Principal Component Analysis(KPCA) modeling sample is impure, a new KPCA monitoring model for power transformer fault detection based on Modified Feature Sample(MFS)method is proposed. A new purification algorithm is proposed to eliminate abnormal samples from original database by using eigenvalue variation. Then a Feature Sample(FS)method is adopted to extract modeling samples of KPCA; compound statistics is used to verify the state of power transformer. Experimental results show effectiveness of the modified feature sample algorithm and the proposed method has high fault sensitivity and diagnosis accuracy.