电力系统保护与控制2024，Vol.52Issue(12)：133-142,10.DOI:10.19783/j.cnki.pspc.231132
一种基于双定频SOGI与交叉补偿的三相锁相环设计方法
A three-phase phase-locked loop design method based on improved frequency-fixed DSOGI and cross-compensation
摘要
Abstract
Phase-locked loop technology based on a frequency adaptive second-order generalized integrator(SOGI)is often combined with a sliding mode observer(SMO)because of its good filtering performance to solve the problems of DC offset,frequency deviation,and phase jump of power grid voltage.For conventional frequency-adaptive SOGI phase-locked loop(PLL),there is frequency coupling between the front-end SOGI block and the back-end PLL block,resulting in poor dynamic performance of the PLL.The proposed method uses frequency-fixed SOGI instead of frequency-adaptive SOGI,eliminating the frequency coupling between the front-end SOGI block and the back-end PLL block.At the same time,a method for cross-compensation of grid voltage is designed.This can accurately compensate for both the phase and amplitude of grid voltage simultaneously,improving the disadvantage of traditional compensation methods that require separate compensation for amplitude and phase.The conventional frequency-adaptive SOGI based PLL and the small-signal model of the proposed frequency-fixed SOGI based PLL is derived in detail,and comparative analysis proves that the proposed PLL is more stable.Finally,the effectiveness of the proposed method is verified through comparative experimental research in different grid voltage conditions.关键词
锁相环/交叉补偿/固定频率/二阶广义积分器/小信号模型Key words
phase-locked loop/cross-compensation/frequency-fixed/SOGI/small-signal model引用本文复制引用
郭磊磊,叶青洋,金楠,李琰琰,吴振军..一种基于双定频SOGI与交叉补偿的三相锁相环设计方法[J].电力系统保护与控制,2024,52(12):133-142,10.基金项目
This work is supported by the National Natural Science Foundation of China(No.U2004166). 国家自然科学基金项目资助(U2004166) （No.U2004166）
河南省科技攻关项目资助(232102241026) （232102241026）
河南省优秀青年科学基金项目资助(242300421074) （242300421074）
