基于间接电流控制的并网逆变器  

Grid-connected inverter based on indirect current control

作　　者：侯世英[1] 肖旭[1] 徐曦[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电力自动化设备》2010年第6期76-79,共4页Electric Power Automation Equipment

基　　金：重庆大学"211工程"三期创新人才培养计划建设项目(S-09111)~~

摘　　要：提出了一种用于并网逆变器的间接电流控制新方法。该方法是在状态平均法的基础上对并网逆变器工作时的基本模态进行分析,推导出实现单位功率因数并网的占空比的控制函数,从而通过控制可调占空比对并网逆变器的输出电流进行控制。该方法的特点是控制电路中只有2个电压回路来调整可调占空比,由于没有电流检测回路,省去了工频变压器和电流互感器,使得控制结构简单,控制成本低;仿真结果表明,与其他传统的PWM控制方式相比,该方法具有抗干扰能力强、开关损耗小、输出电压的谐波畸变率小等优点。An indirect current control for grid-connected inverter is proposed,which analyzes the basic model of grid-connected inverter based on the state average principle,deduces the duty control equation to realize the grid connection with unit power factor,and controls the output current of the grid-connected inverter by adjusting the duty.Its features are as follows：there are only two voltage control loops to set the adjustable duty;since there is no current detection,the power frequency transformer and current transformer are not necessary,resulting in simple control structure and low cost.Simulative results show that,compared with traditional PWM controls,it has the advantages of better anti-interference ability,lower switching loss and smaller output voltage THD.

关 键 词：间接电流控制 并网逆变器 谐波畸变率 功率因数 开关损耗 

分 类 号：TM464[电气工程—电器]