摘要
介绍了带电网电压前馈的电网电流外环、电容电流内环的双闭环控制策略。在滤波参数设计的基础上搭建了仿真模型,分析了控制器参数对动态性能的影响。基于理论分析,给出一种快速设计控制器的方法。仿真结果表明,该方案不仅能有效控制逆变器入网电流,而且抗电网电压扰动能力强。
A double closed loop control strategy with grid current control outer loop and current control inner loop based on capacitor current and feed-forward of grid-voltage was introduced.Based on the design of filter parameters,the simulation model was constructed to analyze the influence of controller parameters on dynamic performance.A quick method of controller design was proposed based on the theoretical analysis.The results illustrate that the solution not only can control inverter grid current effectively,but also has good disturbance rejection ability to the voltage fluctuation of power grids.
出处
《低压电器》
2012年第8期18-21,26,共5页
Low Voltage Apparatus
基金
上海市科委基金(09220502500)
关键词
并网逆变器
电流双闭环控制
LCL滤波器
grid-connected inverter
current double closed loop control
LCL filter
作者简介
钱平(1960-),男,教授,研究方向为电力电子和电力传动装置。
王文发(1987-),男,硕士研究生,研究方向为可再生能源与船舶电力推进控制系统。
叶银忠(1964-),男,教授,博士生导师,研究方向为控制理论与控制工程、系统仿真技术。