基于空间矢量的三相光伏并网逆变器解耦控制研究  

STUDY OF DECOUPLING CONTROL ALGORITHM BASED ON GRID LINE VOLTAGE SPACE VECTOR IN THREE-PHASE PHOTOVOLTAIC GRID-CONNECTED INVERTER

作　　者：易灵芝[1] 彭寒梅[1] 王根平[2] 何素芬[1] 邹晓[1] 李明[1] 陈彦如[1] 

机构地区：[1]湘潭大学信息工程学院,湘潭411105 [2]深圳职业技术学院机电分院,广东518055

出　　处：《太阳能学报》2010年第1期72-78,共7页Acta Energiae Solaris Sinica

基　　金：湖南省自然科学基金(08JJ6029);全国工程硕士课题(GJW0701)

摘　　要：提出一种基于电网线电压空间矢量的三相光伏并网逆变器解耦方法,将复平面分为6个扇区,在每个扇区内实现两相开关解耦,分别控制相应的输出线电流,实现电流跟踪,改善并网电流波形。最后,利用MATLAB建立三相光伏并网逆变器双环系统仿真模型,仿真结果证明了该方法的有效性。A new decoupling method based on grid line voltage space vector of three-phase photovoltaic grid-connected in- verter is provided in which the complex plane is divided into six sectors and two-phase switches in each sector are decou- pied and used to control the corresponding line voltage independently. Thus the output current waveforms are improved, and the control accuracy is raised. The simulation model for the two loop system of three-phase photovoltaic grid-connect- ed inverter based on MATLAB has built, and the simulation result shown that the new decoupling method based on grid line voltage space vector is efficient in Photovohaic Grid-connected Inverter.

关 键 词：空间矢量 滞环电流控制 三相光伏并网逆变器 解耦 仿真 

分 类 号：TM615[电气工程—电力系统及自动化]