介损角测量的两种加窗插值DFT算法  

Two windowed interpolation DFT algorithms for measurement of dielectric loss angle

作　　者：徐志钮[1] 律方成[1] 罗运国 李和明[1] 

机构地区：[1]华北电力大学电气工程学院,河北保定071003 [2]贵阳市乌当供电局,贵州贵阳550018

出　　处：《华北电力大学学报（自然科学版）》2006年第5期11-14,24,共5页Journal of North China Electric Power University：Natural Science Edition

摘　　要：为减少在非同步采样时DFT算法用于介损角测量时存在的误差,将加Blackman-Harris(布莱克曼-哈里斯)窗插值DFT算法和加Hanning(汉宁)窗插值DFT算法用于介损角的测量。分析了两种算法的原理,给出了它们的实现步骤。理论分析和仿真结果表明:在准确获得信号时这两种方法均能准确测定介损角、且受频率波动和谐波变化的影响小,相比之下后者实现容易、计算量较小。To reduce the dielectric loss angle from asynchronous sampling, the Blackman-Harris windowed interpolated Discrete Fourier Transform （DFT） algorithm and Hanning windowed interpolated DFT algorithm are used. The principles of these two algorithms are analyzed. The realization procedures are demonstrated. The results are influenced little by frequency fluctuation and harmonic variation. Theoretical analysis and simulation result indicate that this method is valid.

关 键 词：介损角 谐波分析法 DFT 布莱克曼-哈里斯窗 汉宁窗 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]