三相四桥臂逆变器控制方法研究  

Study of the Control Method of Three-phase Four-leg Inverter

作　　者：董钺[1] 

机构地区：[1]国家海洋技术中心,天津300112

出　　处：《电力电子技术》2012年第6期16-18,25,共4页Power Electronics

基　　金：国家科技支撑计划课题-海洋能开发利用关键技术研究与示范(2008BAA15B02)~~

摘　　要：在边远海岛建设的海洋能独立电站通常采用逆变器为用户供电,由于生活用电多为单相负载或非线性负载,因此采用四桥臂逆变器,可灵活、高效地为不对称负载及非线性负载提供三相对称电压。对三相四桥臂逆变器的数学模型及控制方法进行研究,针对常见方法中存在的问题,提出将逆变器各交流变量分别进行正负序d,q,0变换,由前三桥臂调节输出电压正负序分量,由第四桥臂调节输出电压零序分量的控制方法,并在不同类型负载情况下,对该控制方法进行仿真与实验,验证了该方法的有效性。Marine energy independent power station in the remote island supplies power for customers by using inverter.Most of daily loads are single-phase and non-linear loads,so four-leg inverter is able to supply three-phase symmetrical voltage for asymmetrical and non-linear loads flexibily and effectively.This article studies the mathmatieal model and control method of three-phase four-leg inverter.Aimed at the disadvantage of two kinds of usual control methods,this control method is proposed,in which AC variables of inverter are transformed to positive and negative d, q, 0 reference frames seperately, postive and negative components are controlled by front three legs of inverter, and zero component is compensated by the fourth leg.This method is simulated and examined with different kinds of load so that its availablity is validated.

关 键 词：逆变器 三相 四桥臂 双闭环控制 

分 类 号：TM464[电气工程—电器]