摘要
针对并网逆变器中传统LCL型滤波器存在固有谐振且输出电流存在谐波会污染电网的问题,在分析传统逆变器的控制方法及其模型的基础上,基于控制系统的开环Bode图提出一种有缘阻尼多谐振比例谐振控制器,并引入电容电流反馈作为有源阻尼,设计了具有五次、七次谐波补偿功能的多谐振PR控制器,通过仿真验证控制器可抑制电网中低频谐波,并能保持逆变器允许的稳定性。
In order to solve the problem that traditional LCL filter in grid-connected inverter has inherent resonance and harmonic of output current will pollute the power grid. Based on the analysis of the control method and model of the traditional inverter,a multi-resonant proportional resonance controller with edge damping is proposed based on the open-loop Bode diagram of the control system. The capacitive current feedback is introduced as active damping,and a multi-resonant PR controller with fifth and seventh harmonic compensation functions is designed. The simulation results show that the controller can suppress the low and medium frequency harmonics in the power grid and maintain the allowable stability of the inverter.
作者
张婷娟
张瑜
ZHANG Tingjuan;ZHANG Yu(State Grid Heilongjiang Electric Power Co.,Ltd.Yichun Power Supply Company,Yichun 153000,China)
出处
《黑龙江电力》
CAS
2019年第1期30-34,共5页
Heilongjiang Electric Power
关键词
有源阻尼
并网逆变器
比例谐振
伯德图
active damping
grid-connected inverter
proportional resonant
Bode diagram
作者简介
张婷娟(1981—),女,工程师,主要研究方向为电力系统及其自动化。
