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| Dielectric Loss Angle Measurement Algorithm and Application Based on Triangular Self-Convolution Window |
| Wen He, Teng Zhaosheng, Zeng Bo, Gao Yunpeng, Wang Yi |
| Hunan University Changsha 410082 China |
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Abstract With non-synchronization sampling, the spectral leakage and picket fence effect have great influence on the performance of dielectric loss angle measurement when using FFT. A phase difference revise algorithm for dielectric loss angle measurement is presented based on triangular self-convolution window (TSCW), and the application in on-line dielectric loss angle monitoring of high voltage capacitive-type equipment is introduced in this paper. As the triangular self-convolution window has good side lobe behavior, the new algorithm can improve the accuracy of dielectric loss angle measurement by weighting the signal with TSCW. The simulation and application results, which include fundamental frequency fluctuation, changing of sampling frequency, real value of dielectric loss angle variance, white noise, changing of harmonic component verify the effectiveness and practicability of the algorithm.
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Received: 04 August 2008
Published: 04 March 2014
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2010, Vol. 25 
