Synchrophasor Measurement Method Based on Cascaded Infinite Impulse Response and Dual Finite Impulse Response Filters  

作　　者：Boyu Zhao Hao Liu Tianshu Bi Sudi Xu 

机构地区：[1]the State Key Laboratory of Alternate Electric Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China [2]the State Grid Jiangsu Electric Power Research Institute,Nanjing 210036,China

出　　处：《Journal of Modern Power Systems and Clean Energy》2024年第5期1345-1356,共12页现代电力系统与清洁能源学报（英文）

基　　金：supported by the National Natural Science Foundation of China(No.52377098)。

摘　　要：High-precision synchronized measurement data with short measurement latency are required for the applications of phasor measurement units(PMUs).This paper proposes a synchrophasor measurement method based on cascaded infinite impulse response(IIR)and dual finite impulse response(FIR)filters,meeting the M-class and P-class requirements in the IEC/IEEE 60255-118-1 standard.A low-group-delay IIR filter is designed to remove out-of-band interference components.Two FIR filters with different center frequencies are designed to filter out the fundamental negative frequency component and obtain synchrophasor estimates.The ratio of the amplitudes of the synchrophasor is used to calculate the frequency according to the one-to-one correspondence between the ratio of the amplitude frequency response of the FIR filters and the frequency.To shorten the response time introduced by IIR filter,a step identification and processing method based on the rate of change of frequency(RoCoF)is proposed and analyzed.The synchrophasor is accurately compensated based on the frequency and the frequency response of the IIR and FIR filters,achieving high-precision synchrophasor and frequency estimates with short measurement latency.Simulation and experiment tests demonstrate that the proposed method is superior to existing methods and can provide synchronized measurement data for M-class PMU applications with short measurement latency.

关 键 词：Synchrophasor measurement frequency estimation infinite impulse response filter complex bandpass filter 

分 类 号：TM727[电气工程—电力系统及自动化] TN713[电子电信—电路与系统]