(19期已排版）基于全相位Fourier变换的电力系统相量测量新方法

罗蓬; 郝晓光; 李铁成; 王献志

罗蓬,郝晓光,李铁成,王献志.(19期已排版）基于全相位Fourier变换的电力系统相量测量新方法[J].电测与仪表,2017,54(20):.
Luo Peng,Hao Xiao-guang,Li Tie-cheng,Wang Xian-zhi.A New Vector Measurement Method for Power System Based on All-phase Fourier Transform[J].Electrical Measurement & Instrumentation,2017,54(20):.

(19期已排版）基于全相位Fourier变换的电力系统相量测量新方法

A New Vector Measurement Method for Power System Based on All-phase Fourier Transform

DOI：

中文关键词: 电力系统相量测量单元全相位快速Fourier变换相位不变性

英文关键词:Power system Phasor measurement unit (PMU) All-phase fast Fourier transform (apFFT) Phase invariant

基金项目:

作者中文名	作者英文名	单位
罗蓬	Luo Peng	国网河北省电力公司电力科学研究院
郝晓光	Hao Xiao-guang	国网河北省电力公司电力科学研究院
李铁成	Li Tie-cheng	国网河北省电力公司电力科学研究院
王献志	Wang Xian-zhi	国网河北省电力公司电力科学研究院

摘要点击次数: 2423

中文摘要:

提出了一种基于全相位Fourier变换(apFFT)的电力系统相量测量新方法。该方法利用apFFT良好的抑制频谱泄露能力以及“相位不变性”,实现了PMU装置快速、准确的相位估计,然后采用时移相位差谱校正法实现了频率以及幅度参数的估计。文中给出了算法具体的计算流程,并采用ARM9微处理器完成了新型PMU测量装置硬件设计。仿真实验表明,在无噪情况下本文方法接近于无偏估计,在参数估计的RMSE相同时,与传统算法相比,本文算法可提供7dB左右的信噪比增益。

英文摘要:

A novel vector estimation method for PMUs in power system is proposed, which is based on all-phase fast Fourier transform (apFFT). Due to apFFT’s excellent performance in suppressing spectral leakage and the property of ‘phase invariant’, this method can realize the accurate estimation of PMU phase angle, and then the time-shift phase difference spectrum correction is adopted to estimate the frequency and amplitude parameters. The calculation flow of this algorithm is proposed, and the hardware of new measuring device is designed based on ARM9 microprocessor. Simulation results show that the proposed method is close to unbiased estimation for noise-free case, and the algorithm in this paper can obtain 7dB signal-to-noise ratio gain compared with the conventional method.

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