A METHOD OF VOLTAGE FLICKER ESTIMATION BASED ON INTERHARMONIC PAIRS
This paper proposed a new method to estimate voltage flicker using the discrete Fourier transform (DFT). Based on the specified signal processing recommendations by IEC61000-4-7,the proposed method obtains the amplitude,frequency and phase angle of each harmonic/interharmonic using the odd points interpolation correction method. According to the electric power distortion component symbiosis mechanism,the detected interharmonics in pairs are transformed into a flicker signal. Combined with the double-side property,the interharmonics in pairs can be extracted. The parameters of flicker signal are obtained by the signal transform equations. The simulation results indicate that it is easy and quick to estimate the parameters by detecting the interharmonics signal directly and estimating the flicker signal indirectly; and the odd points interpolation correction method can separate harmonics from interharmonics effectively,and strongly restrain the spectral interruption.
flicker interharmonics frequency domain analysis power quality
LI Fei-fei YE Mao-qing YANG Hong-geng HUI Jin
School of Electrical and Information,Sichuan University,Chengdu 610065,Sichuan Province,China Sichuan Electric Power Research Institute,Chengdu 610072,Sichuan Province,China
国际会议
南京
英文
1359-1364
2010-09-13（万方平台首次上网日期，不代表论文的发表时间）