结合频谱校正的修正理想采样频率方法用于介损角测量  

The Dielectric Loss Angle measurement Combined Modified Ideal Sampling Frequency with Spectrum Rectifying

作　　者：徐志钮[1] 律方成[1] 赵丽娟[1] 李和明[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《高压电器》2006年第5期365-367,共3页High Voltage Apparatus

摘　　要：提出了结合频谱校正方法和修正理想采样频率的介损角测量方法,该方法使用加Hanning窗插值的谐波分析法获得信号基波频率的准确值,然后根据获得的频率采用线性插值的方法构造符合同步采样的序列并进行DFT,进而获得信号的介损角。仿真信号的计算结果表明,该算法精确度高、实现容易,是介损角测量的一种很有推广价值的方法。Error of dielectric loss angle measurement can be alleviated in asynchronous sampling by adopting modified ideal sampling frequency method, and the accuracy of calculation result can be improved. But the method needs to get the fundamental harmonic frequency of signal beforehand. The dielectric loss angle measurement combined modified ideal sampling frequency with spectnlm rectifying is presented in the paper. In this method, signal frequency is acquired by harmonics analysis method based on hanning-windowed interpolation, then, the array of asynchronous sampling is set up according to the frequency obtained. The dielectric loss angle of equipment is obtained by DFF. Simulation results show that this algorithm has high accuracy, and easy to realize, which is a worthy method for dielectric loss angle measurement.

关 键 词：介损角 HANNING窗 修正理想采样频率 谐波分析法 

分 类 号：TM934.32[电气工程—电力电子与电力传动]