三相LCL型并网逆变器d-q阻抗建模  

d-q Small-signal Impedance of Three-phase Grid-connected Inverter With LCL Filter

作　　者：王鹏[1] 周剑桥[2] 冯光[1] 王磊[1] 

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450052 [2]风力发电研究中心,上海交通大学,上海200240

出　　处：《电力电子技术》2016年第10期36-38,共3页Power Electronics

基　　金：国网河南省电力公司科技项目(52170214001A)~~

摘　　要：分布式发电系统中,多个并网逆变器与配电网之间的动态交互会导致系统不稳定,采用阻抗分析法能够有效分析该问题。在d,q坐标系下对三相LCL型并网逆变器进行小信号阻抗建模,考虑并网逆变器主电路、锁相环(PLL)以及控制环路之间的联系,适用于多逆变器配网系统的稳定性分析。最后,通过与实验阻抗测量结果进行对比,验证了该方法的正确性。In distributed generation system, grid-connected inverters have dynamic interaction with power distribution network, which may lead to instability.To study this issue,impedance-based stability theory should be used.A novel d-q small-signal impedance of three-phase grid-connected inverter with LCL filter is proposed, considering the relationship of main circuit, controlling circuit and PLL dynamics.Simulation and experimental measurements verify the model.

关 键 词：并网逆变器 阻抗建模 锁相环动态 

分 类 号：TM464[电气工程—电器]