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.
出处
《电力电子技术》
CSCD
北大核心
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)~~
关键词
并网逆变器
阻抗建模
锁相环动态
grid-connected inverter
impedance
phase locked-loop dynamics
