基于二阶广义积分单相锁相环的改进及实现  

Improvement and Implementation of Single Phase Phase-locked-loop Based on Second Order Generalized Integrator

作　　者：祁新梅[1] 沈海滨[1] 余文海[1] 郑寿森[1] 

机构地区：[1]中山大学,广东珠海519082

出　　处：《电力电子技术》2016年第1期96-98,共3页Power Electronics

基　　金：广东省自然科学基金(8451027501001493)~~

摘　　要：并网逆变器中锁相环(PLL)的精度与动态响应直接影响逆变器的性能指标。分析了传统二阶广义积分(SOGI)数字锁相环,针对其在频率突变时出现较大相位误差的问题,引入一个相位误差补偿进行算法改进。仿真和实验均表明,改进型SOGI算法在电网电压谐波含量高、幅度突变及频率突变情况下都具有良好的锁相精度及快速的时间响应。Accurate and fast detection of grid voltage phase is essential to assure a high power factor in grid-connected inverter output.It analyzes the classical phase-locked loop（PLL） based on second order generalized integrator（SOGI）and proposes that a phase error compensation is added to improve the SOGI PLL and reduce the phase error during sudden frequency change.Simulation and experimental results show that improved PLL can keep a faster and more accurate phase detection during grid voltage fluctuation,sudden frequency change and distortion.

关 键 词：逆变器 单相 锁相环 

分 类 号：TM464[电气工程—电器]