电力系统自动化2024，Vol.48Issue(17)：88-96,9.DOI:10.7500/AEPS20230923001
次/超同步间谐波影响下PMU基波频率测量误差机理分析及抑制
Mechanism Analysis and Suppression of PMU Fundamental Frequency Measurement Error Under Influence of Sub-/Super-synchronous Interharmonics
摘要
Abstract
The high proportion of renewable energy and power electronic equipment has generated a large number of sub-/super-synchronous interharmonics in the power grid,resulting in significant deviations in the fundamental frequency measurement of synchrophasor measurement unit(PMU),which affects the effectiveness of various frequency applications.Therefore,the paper proposes a mechanism analysis and suppression method for fundamental frequency measurement error under the influence of sub-/super-synchronous interharmonics.Firstly,a frequency domain characteristic model of the frequency measurement algorithm is established,and based on this,a mathematical model of fundamental frequency oscillation under the influence of a single interharmonic and symmetrical sub-/super-synchronous interharmonics is derived,revealing the mechanism of fundamental frequency measurement error under interharmonic interference.Secondly,based on the oscillation behavior of frequency,a fitting model of multi-component superposition is established,and a short-time window frequency oscillation component suppression method based on Fourier transform and least squares method is proposed,which significantly reduces the fundamental frequency deviation.Finally,simulation and on-site recorded data test verify that the proposed method reduces frequency measurement errors greatly.关键词
基波频率测量/次/超同步间谐波/同步相量测量装置/同步相量测量/测量误差Key words
fundamental frequency measurement/sub-/super-synchronous interharmonic/synchrophasor measurement unit(PMU)/synchrophasor measurement/measurement error引用本文复制引用
许苏迪,袁宇波,王晨清,李娟,李鹏,高磊..次/超同步间谐波影响下PMU基波频率测量误差机理分析及抑制[J].电力系统自动化,2024,48(17):88-96,9.基金项目
国网江苏省电力有限公司科技项目(J2022025). This work is supported by State Grid Jiangsu Electric Power Co.,Ltd.(No.J2022025). （J2022025）
