电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2015年
15期
124-128
,共5页
有源电力滤波器%特征提取%故障诊断%小波包%神经网络
有源電力濾波器%特徵提取%故障診斷%小波包%神經網絡
유원전력려파기%특정제취%고장진단%소파포%신경망락
active power filter ( APF)%feature extraction%fault diagnosis%wavelet packet%neural network
针对有源电力滤波器APF（ Active Power Filter ）的IGBT功率管易发生故障的问题，提出了基于故障特征提取的有源电力滤波器故障诊断方法。构建了APF故障仿真模型和基于小波包分析的故障特征提取方法，仿真分析了APF网侧电流波形，并运用小波包分析对IGBT故障时的网侧电流波形进行处理，提取了IGBT故障特征向量，最后运用神经网络对特征向量的分类来实现对APF的故障诊断。在APF故障诊断系统上进行测试，验证了该诊断方法的有效性和可行性。
針對有源電力濾波器APF（ Active Power Filter ）的IGBT功率管易髮生故障的問題，提齣瞭基于故障特徵提取的有源電力濾波器故障診斷方法。構建瞭APF故障倣真模型和基于小波包分析的故障特徵提取方法，倣真分析瞭APF網側電流波形，併運用小波包分析對IGBT故障時的網側電流波形進行處理，提取瞭IGBT故障特徵嚮量，最後運用神經網絡對特徵嚮量的分類來實現對APF的故障診斷。在APF故障診斷繫統上進行測試，驗證瞭該診斷方法的有效性和可行性。
침대유원전력려파기APF（ Active Power Filter ）적IGBT공솔관역발생고장적문제，제출료기우고장특정제취적유원전력려파기고장진단방법。구건료APF고장방진모형화기우소파포분석적고장특정제취방법，방진분석료APF망측전류파형，병운용소파포분석대IGBT고장시적망측전류파형진행처리，제취료IGBT고장특정향량，최후운용신경망락대특정향량적분류래실현대APF적고장진단。재APF고장진단계통상진행측시，험증료해진단방법적유효성화가행성。
For the sake of easily damaged characteristic of IGBT , a method to diagnose the fault of APF was proposed based on fault feature extraction .The model of APF fault simulation and the method of the feature extraction based on the wavelet packet analysis were established , and the waveforms of grid side current were simulated , processed the waveforms of grid side current of IGBT open circuit fault by wavelet packet analysis , and extracted the fault features vector.Finally, the classification function of the neural network was applied for the APF fault diagnosis .The effec-tiveness and feasibility of the diagnosis method are validated by test results of APF fault diagnosis system .
