摘要
由电力电子器件构成的ASVG主回路,是系统容易发生故障的薄弱环节,且发生开路故障不易被察觉。本文利用开关函数傅里叶分析主回路在正常、单管开路和同相两管开路时直流侧电流的频谱变化,对故障状态进行分类。再通过三相输出电流的平均值进行故障管定位。用MATLAB仿真验证了理论分析的正确性和该方法的有效性。
The ASVG main circuit consisting of power electromc elements is a weak link with prone to fault and, in case of open circuit fault, is not easily observed. In this paper, the fault conditions are classified through analyzing the variation of frequency spectrum of DC side current of main circuit in normal condition, one transistor open and two-phase two transistors open condition by the use of switching function＇s FFT. The fault is located through the average value of three-phase output cur- rent. The correctness of theoretical analysis and validity of the method are verified by MATLAB sim- ulation.
出处
《电力电容器与无功补偿》
2013年第1期80-83,87,共5页
Power Capacitor & Reactive Power Compensation
关键词
ASVG
开关函数
傅里叶分析
频谱
故障诊断
ASVG
switching function
FFT analysis
frequency spectrum
fault diagnosis
