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| Power System Interharmonics Analysis Based on Autoregression Model |
| Zhang Huijuan1, Wang Youhua1, Wang Yanting1, Zong Shifang1, Li Chengxiang2 |
| 1. Hebei University of Technology Tianjin 300132 China 2. Tarim Oil and Gas Production Technology Department Korla 841000 China |
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Abstract Interharmonics does very harm to the security and economical operation of power system. Therefore, it is necessary and important to do researches on analyzing harmonics and interharmonics accurately and reliably. For the actual signal of power system, harmonics and interharmonics is not often determined in advance. So in the FFT spectrum, it is not easy to determine that which are the actual frequency signal lines, which are the false spectral lines. Autoregression (AR) model is adopted in this paper to obtain each frequency component of signal. Then the double spectrum peaks interpolation algorithm of Rife-Vincent (Ⅲ) is used to correction the amplitude, frequency, and phase angle. Simulation results indicate that the proposed approach is more accurate.
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Received: 04 December 2009
Published: 04 March 2014
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2010, Vol. 25 
