基于汉宁窗的配电网同步相量测量装置算法及应用  

Research and Application of Algorithm for Distribution Network Synchronous Phasor Measurement Unit Based on Hanning Window

作　　者：余高旺 方陈 樊占峰 蔺立 龚赟 朱云峰 YU Gaowang;FANG Chen;FAN Zhanfeng;LIN Li;GONG Yun;ZHU Yunfeng(XJ Electric Co.,Ltd.,Xuchang 461000,China;State Grid Shanghai Electric Power Research Institute,Shanghai 200437,China)

机构地区：[1]许继电气股份有限公司,河南许昌461000 [2]国网上海市电力公司电力科学研究院,上海200437

出　　处：《中国电力》2022年第6期18-24,共7页Electric Power

基　　金：国家重点研发计划资助项目(2017YFB0902800)。

摘　　要：配电网量测环境复杂、恶劣,输电网的传统同步相量算法难以满足要求。分析了常用窗函数下傅立叶算法的谐波抑制能力,利用3个等间隔的加汉宁窗离散傅立叶变换(FFT)推导出定间隔采样下同步相量测量算法,在理论上消除了非额定频率下的频率泄露影响,能满足高精度的相位测量要求,具有很好的谐波/间谐波抑制能力。针对多个信号同时存在时频谱泄露影响计算精度问题,分析比较了加汉宁窗FFT插值算法相对其他窗函数的优势。理论分析和实际测试表明,采用上述方案后,提升了相量、谐波/间谐波等量值的测量精度。The measurement environment of distribution network is complex and poor,and the traditional synchronous phasor algorithm of transmission network is difficult to meet the requirements.The harmonic suppression ability of Fourier algorithm under common window functions is analyzed.The synchronous phasor measurement algorithm with fixed interval sampling is deduced by using three equal interval discrete Fourier transforms with Hanning window,which theoretically eliminates the influence of frequency leakage under non rated frequency,and can meet the requirements of high-precision phase measurement with good harmonic/interharmonic suppression ability.Aiming at the problem that spectrum leakage affects the calculation accuracy when multiple signals exist at the same time,the advantages of FFT interpolation algorithm with Hanning window over other window functions are analyzed and compared.Theoretical analysis and practical tests show that the measurement accuracy of phasor,harmonic/interharmonic and other quantities is improved after adopting the above scheme.

关 键 词：配电网 同步相量 汉宁窗 FFT 谐波 

分 类 号：TM933.313[电气工程—电力电子与电力传动]