基于级联型二阶广义积分器的单相锁相环设计
Design of single-phase phase-locked loop based on cascaded second-order gener-alized integrator
俞聪 1夏银水 2石守东 2刘秉澍 3李红全3
作者信息
- 1. 宁波大学信息科学与工程学院,浙江宁波 315000
- 2. 宁波大学信息科学与工程学院,浙江宁波 315000;乐歌人体工学科技股份有限公司,浙江宁波 315000
- 3. 乐歌人体工学科技股份有限公司,浙江宁波 315000
- 折叠
摘要
由于当前电网中不可避免地存在着各种直流偏置和高次谐波,而传统的基于二阶广义积分器结构(Second-order Generalized Integrator,SOGI)的单相锁相环(Phase-Locked Loop,PLL)存在对直流偏置敏感及对高次谐波的滤除能力不足等问题,针对该问题提出了一种级联型二阶广义积分器结构.该结构由三个SOGI模块级联构成,通过前两级SOGI模块分别滤除高次谐波和直流分量,再经过第三级SOGI模块输出一对正交分量.通过MATLAB/Simu-link建模仿真及实验平台验证,结果显示文中所提出的级联型SOGI-PLL具有不错的抗直流偏置干扰能力及谐波抑制效果,对单相系统并网的实现具有良好的借鉴意义.
Abstract
Due to the inevitable existence of various DC bias and higher harmonics in the current power grid,the traditional phase-locked loop(PLL)based on Second-order Generalized Integrator(SOGI)is sensitive to DC bias and has insufficient filter-ing ability for higher harmonics.To solve this problem,a cascaded second-order generalized integrator structure is proposed,which consists of three cascaded SOGI modules.The first two SOGI modules filter out the higher harmonic and DC components respectively,and then output a pair of orthogonal components through the third SOGI module.Through MATLAB/Simulink mod-eling simulation and experimental platform verification,the results show that the cascaded SOGI-PLL proposed in this paper has good anti-DC bias interference ability and harmonic suppression effect,which has a good reference significance for the realiza-tion of single-phase system.
关键词
级联型二阶广义积分器/锁相环/直流偏置/谐波抑制/并网控制Key words
cascaded second-order generalized integrator/phase-locked loop/DC bias/harmonic suppression/grid connected control引用本文复制引用
出版年
2025
NETL
NSTL
万方数据