单相光伏并网逆变器迭代比例积分电流控制方法  

Current Control Method of Iterative Proportional Integral for Single-phase Photovoltaic Grid-connected Inverter

作　　者：李圣清[1] 张彬[1] 徐天俊 杨峻[1] 

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲412007

出　　处：《电气传动》2014年第10期31-34,共4页Electric Drive

基　　金：国家自然科学基金资助项目(51077046);湖南省自然科学基金项目(14JJ2116);湖南省重点建设学科项目(201176)

摘　　要：光伏并网逆变器是光伏发电并网系统中的核心组成器件,逆变器的控制方法决定其输出电能质量。提出了迭代比例积分的并网逆变器电流控制方法,该方法采用时间乘绝对误差积分准则作为目标函数,并推导出并网逆变器输出电流的迭代比例积分表达式及传递函数。通过实时设定控制器的最佳比例积分参数来提高逆变器的控制精度和速度,从而改善输出电流质量。仿真和实验结果表明,该方法计算简单,具有较高的工程实用价值。Photovoltaic grid-connected inverter is the core component device of photovoltaic grid-connectedsystem,the output power quality is determined by the control method of inverter.A current control method of iterativeproportional integral for grid-connected inverter was proposed.This method used the ITAE criteria as the objectivefunction,and deduced the expression on iterative proportional-integral and transfer function of grid-connected inverteroutput current.Control accuracy and speed of inverter were improved through real-time setting its optimal proportional-integral controller parameters,thereby the quality of the output current was ameliorated.Simulation and experimentalresults show that this method is simple to calculate and has a high practical value.

关 键 词：单相光伏并网逆变器 迭代比例积分 电流控制方法 电能质量 

分 类 号：TM615[电气工程—电力系统及自动化]