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    • Bandpass Filtering Scheme for Improving Phasor Measurement Accuracy

    Xingchen Han,Hengxu Zhang,Fang Shi,Peng Wang,Yunbo Wang

    IEEE Innovative Smart Grid Technologies-Asia（2019）

    The Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education | Henan Electric Power Research Institute | Shenhua Guoneng Shandong Construction Group

    Cited 0|Views7
    Abstract
    The increasing penetration of the renewable energy sources have dramatically changed the dynamic characteristics of the distribution network. The distribution-level phasor measurement unit (D-PMU) has drawn worldwide attention. In order to reduce the errors caused by interharmonics in synchronous phasor measurement, this paper proposes a filtering scheme suitable for hardware devices. Firstly, the filter bank parameters are determined based on the fundamental and harmonic characteristics. Then, a scheme of extracting the fundamental wave using zero phase filtering is proposed. Finally, a scheme for extracting harmonics by combining primary filtering and least squares fitting is proposed. The simulation results and hardware test results show that the accuracy of phasor calculation is greatly improved and the robustness of the phasor measurement algorithm is significantly enhanced.
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    synchronous phasor,interharmonics,bandpass digital filter bank,least squares fitting
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