基于滤波器前置的三相软件锁相环设计  

Design of three-phase software phase locked loop based on prefilter

作　　者：刘启德 王海云[1] 王浩成 徐永 LIU Qide;WANG Haiyun;WANG Haocheng;XU Yong(Research Center of Renewable Energy Generation and Grid-connected Control Engineering Technology,Ministry of Education,College of Electrical Engineering,Xinjiang University,Urumqi 830047,China;College of Electronic and Information Engineering,Yili Normal University,Yining 835000,China)

机构地区：[1]新疆大学电气工程学院教育部可再生能源发电与并网控制工程技术研究中心,新疆乌鲁木齐830047 [2]伊犁师范大学电子与信息工程学院,新疆伊宁835000

出　　处：《电力自动化设备》2021年第7期124-129,151,共7页Electric Power Automation Equipment

基　　金：自治区重点研发计划(2020B02001);自治区高校重大项目(XJEDU2017I002)。

摘　　要：针对传统锁相环在电压不平衡及畸变时锁相误差大、动态响应速度慢的问题,根据软件锁相环(SPLL)的原理提出一种滑动滤波器(MAF)前置锁相环,并通过一种快速不平衡分量抑制及相位延迟补偿的方法来改善MAF性能,有效提高了锁相环的动态响应速度和锁相精度。通过MATLAB/Simulink仿真平台及TMS320F28335数字信号处理器芯片对所提出的锁相环控制策略在三相电压不平衡及电压畸变的条件下进行验证,结果表明该SPLL锁相误差小,动态响应速度快,稳定性高。In order to solve the problems of large phase-locked error and slow dynamic response of traditional SPLL(Software Phase Locked Loop)under unbalanced and distorted voltage,a prefilter SPLL based on MAF(Moving Average Filter)is proposed,which is based on the principle of traditional SPLL.A fast unbalanced component suppression and phase delay compensation method is applied to improve the performance of MAF,which effectively improves the dynamic response speed and phase-locked accuracy of the proposed SPLL.Through MATLAB/Simulink simulation platform and TMS320F28335 DSP(Digital Signal Processor)chip,the control strategy of the proposed SPLL is verified under the condition of three-phase voltage unbalance and voltage distortion.The results show that the SPLL has small phase-locked error,fast dynamic response speed and high stability.

关 键 词：软件锁相环 滑动滤波器 相位延时补偿 电压畸变 数字信号处理器 

分 类 号：TN713[电子电信—电路与系统] TN850.4