电网扰动下改进型SOGI-PLL的动态性能研究  

Research on Dynamic Performance of Improved SOGI-PLL under Power Grid Disturbance

作　　者：巫春玲[1] 周翔宇 张震 

机构地区：[1]长安大学电子与控制工程学院,西安710000

出　　处：《机电一体化》2022年第2期49-56,共8页Mechatronics

基　　金：国家自然科学基金“青年基金”项目(61701044);陕西省科技计划项目(211432190345);长安大学中央高校基本科研业务费专项资金(300102320301)。

摘　　要：基于二阶广义积分器的锁相环(SOGI-PLL)凭借其结构简单和鲁棒性强等优势,在并网逆变器电网同步和控制中有着广泛的应用。为改善SOGI在电网电压受到扰动时的动态性能,已提出多种改进型SOGI-PLL。文章对于改进型SOGI-PLL进行了系统分类,对电网扰动下的动态性能进行了全面的分析与研究。在电网电压跌落、频率/相位跳变等电网扰动,以及含有直流偏置或高次谐波等情况下的性能进行比较实验,综合评估不同锁相环结构在不同电网条件下的适应性和可行性,为电网同步控制的选择提供了有效依据。Second order generalized integrator-phase-locked loop(SOGI-PLL)based on second-order generalized integrator is widely used in grid synchronization and control of grid-connected inverter because of its simple structure and strong robustness.In order to improve the dynamic performance of SOGI when the grid voltage is disturbed,a variety of improved SOGI—PLL have been proposed.In this paper,the improved SOGI—PLL is systematically classified,and the dynamic performance under power grid disturbance is analyzed and studied comprehensively.Comparative experiments are carried out on the performance of power grid disturbances such as voltage drop,frequency/phase jump,and with DC bias or high-order harmonics,to comprehensively evaluate the adaptability and feasibility of different phase-locked loop structures under different power grid conditions.It provides an effective basis for the selection of power grid synchronization control.

关 键 词：电网同步 锁相环 二阶广义积分器 直流偏置 

分 类 号：TM46[电气工程—电器]