收稿日期:20220908作者简介:王秋莎(1986-),女,高级工程师,主要从事新能源设计研究工作。基金项目:国网河北省电力有限公司科技项目(kj2021062)。最小均方自适应滤波器设计及性能影响因素分析王秋莎1,张峥2,王磊3,程子玮3,闫鹏3(1.中国电建集团河北省电力勘测设计研究院有限公司,河北石家庄050031;2.国网吉林省电力有限公司长春供电公司,吉林长春130021;3.国网河北省电力有限公司电力科学研究院,河北石家庄050021)摘要:同步相量测量单元是全局同步时钟下实现电网中电压和电流信号同步相量、频率和频率变化率测量的仪器,但信号中通常包括大量噪声,对其应用造成较大影响。本文在数字滤波器基础上提出最小均方自适应滤波器,阐述了最小均方自适应滤波器基本原理和计算方法,通过算例分析了步长参数、滤波器阶数、信噪比变化对最小均方自适应滤波器收敛速度、系统跟踪速度和稳态误差等指标的影响,揭示了其变化规律。关键词:同步相量测量单元;数字滤波器;最小均方;自适应滤波器中图分类号:TM933;TN713.7文献标志码:B文章编号:10019898(2023)03005105AnalysisontheInfluenceofFactorsPerformanceandDesignofLeastMeanSquareAdaptiveFilterWANGQiusha1,ZHANGZheng2,WANGLei3,CHENGZiwei3,YANPeng3(1.HebeiElectricReconnaissanceDesignInstitute,Shijiazhuang050031,China;2.StateGridJilinElectricPowerCo.,Ltd.ChangchunPowerSupplyCompany,Changchun130021,China;3.StateGridHebeiElectricPowerResearchInstitute,Shijiazhuang050021,China)Abstract:Thesynchronousphasormeasurementunitisusedtorealizethesynchronousphasor,frequencyandfrequencychangerateofvoltageandcurrentsignalsinthepowergridundertheglobalsynchronousclock,butthesignalsusuallyincludealargeamountofnoise,whichhasagreatimpactonitsapplication.Inthispaper,digitalfiltersareintroducedfirst,andthentheleastmeansquareadaptivefilterisproposed.Thebasicprincipleoftheleastmeansquareadaptivefilterisdescribed.Theinfluenceofstepsizeparameter,filterorderandsignal-to-noiseratioontheconvergencespeed,systemtrackingspeedandsteady-stateerroroftheminimummeansquareadaptivefilterisanalyzedthroughacalculatingexample,anditsvariationlawisrevealed,whichplaysanimportantroleinprocessingthedatacollectedbythesynchronousphasormeasurementunit.Keywords:synchr...
