基于双层控制和多SOGI的三相数字锁相环设计  

Design of Three-phase Digital Phase-locked Loop Based on Double-layer Control and Multi-SOGI

作　　者：陈鹏飞[1] 徐耀良[1] 王悦[1] 夏栋[1] CHEN Pengfei;XU Yaoliang;WANG Yue;XIA Dong(College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力学院自动化工程学院,上海200090

出　　处：《电气传动》2017年第5期58-62,共5页Electric Drive

摘　　要：针对电网中因电压不平衡、含有谐波分量而造成的传统锁相环基波相位跟踪失败,多SOGI的锁相环响应速度慢,有较大误差的问题,在多SOGI的基础上提出了双层控制(内分泌控制)策略。在电压不平衡、含有谐波的情况下分别进行仿真分析,仿真结果证明该方案比传统锁相环和多SOGI锁相环能更好地跟踪电网基波电压的相位,同时能有效地提取正、负序幅值,提高了并网发电系统并网的快速性、稳定性和有效性。In view of the traditional phase locked loop fundamental phase tracking failure,the response speed of multi-SOGI phase locked loop is slow,and there is a big error caused by unbalanced voltage and harmonic components in the power system,a double-layer control(hormonal control)strategy was proposed based on the multi-SOGI.Simulation analysis was carried out under the condition of unbalanced voltage and harmonic,the results show that the proposed scheme is better than the traditional phase?locked loop and the multi?SOGI phase?locked loop to track the phase of the fundamental wave voltage of the grid.At the same time,it can effectively extract the amplitude of positive and negative sequence,and improve the fast,stability and efficiency of grid connected generation system.

关 键 词：数字锁相环 相位跟踪 三相不平衡 双层控制 

分 类 号：T762[一般工业技术]