Abstract：When using FFT for dielectric loss angle (DLA) measurement, the spectral leakage causes errors because of non-synchronization sampling. To reduce those errors, an interpolated FFT algorithm for dielectric loss angle measurement based on triangular self-convolution window (TSCW) is presented in this paper. As the side lobe of the TSCW decays at a very fast rate, errors of DLA measurement caused by spectral leakage can be eliminated by the TSCW. The voltage and current signals were weighted with the TSCW, respectively. Then, the DLA is estimated by fundamental phases of the voltage and current signals though interpolated FFT algorithm. The simulation results, which include fundamental frequency fluctuation, changing of real value of DLA and harmonic component variance, have verified the effectiveness and practicability of the algorithm.
温和, 滕召胜, 王一, 吴双双, 邬蓉蓉. 基于三角自卷积窗的介损角高精度测量算法[J]. 电工技术学报, 2009, 24(3): 203-208.
Wen He, Teng Zhaosheng, Wang Yi, Wu Shuangshuang, Wu Rongrong. High Accuracy Dielectric Loss Angle Measurement Algorithm Based on Triangular Self-Convolution Window. Transactions of China Electrotechnical Society, 2009, 24(3): 203-208.
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2009, Vol. 24 
