基于SOGI的光伏并网逆变器锁相环的优化研究  

Research on optimization of phase locked loop for PV grid-connected inverters based on SOGI

作　　者：李锐 李鹏 张琦[3] 高小娟 LI Rui;LI Peng;ZHANG Qi;GAO Xiaojuan(State Grid Ningdong Power Supply Company,Yinchuan 750411,China;Western New Energy(Ningxia)Electric Power Engineering Design Co.,Ltd.,Yinchuan 750409,China;Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]国网宁夏电力有限公司宁东供电公司,宁夏银川750411 [2]西部新能(宁夏)电力工程设计有限公司,宁夏银川750409 [3]西安理工大学电气工程学院复杂系统控制与智能信息处理重点实验室,陕西西安710048

出　　处：《电气应用》2023年第12期77-82,共6页Electrotechnical Application

摘　　要：在宁夏的中东部地区,风光资源良好,大量光伏电站以及风电场并入大电网,促进风光资源的有效利用与开发。随着新型光伏材料的出现,成本不断降低,转换效率不断提高,光伏并网得到大量推广。为实现光伏并网逆变器的快速并网,针对单级式光伏并网逆变器锁相环进行研究,分析传统的锁相环因存在1/4周期的延迟,导致跟踪性及动态响应不佳,提出了基于二阶广义积分器(Second Order Generalized Integrator,SOGI)的锁相环并进行对比分析,将SOGI引入后,提高了并网逆变器的并网效率和动态响应,对于光伏并网逆变系统具有一定的研究意义。In the central and eastern regions of Ningxia,there are good wind and solar resources,with a large number of photovoltaic power stations and wind farms integrated into the large power grid to promote the effective utilization and development of wind and solar resources.And with the emergence of new photovoltaic materials,costs continue to decrease,conversion efficiency continues to improve,and photovoltaic grid connection has been widely promoted.In order to realize rapid grid-connection of photovoltaic grid-connected inverters,this paper focuses on the research of single stage photovoltaic grid connected inverters phase-locked loops,and analyzes that the traditional phase-locked loop has a quarter period delay,which leads to poor tracking and dynamic response.And proposes a method based on SOGI for comparative analysis of the Second Order Generalized Integrator’s phase-locked loop shows that the introduction of SOGI improves the grid-connected inverter’s efficiency and dynamic response,which has a certain research significance for grid-connected photovoltaic inverter systems.

关 键 词：化石能源 清洁能源 风光资源 太阳能电池阵列 单级式光伏并网逆变器 SOGI 锁相环 

分 类 号：TM464[电气工程—电器] TN911.8[电子电信—通信与信息系统]