三相光伏逆变器的设计和控制  

Design and control of three phase photovoltaic inverter

作　　者：张宁[1] 陈丽颖[1] 杨世宁[1] 

机构地区：[1]黑龙江科技大学电气与控制工程学院,哈尔滨150022

出　　处：《黑龙江电力》2015年第3期259-263,共5页Heilongjiang Electric Power

摘　　要：为解决传统三桥臂逆变器在负载三相不对称情况下难以输出对称的三相电压的问题,提出一种新的逆变器,可以在不平衡负载情况下有效抑制不平衡负载电流对电压的扰动,保证输出三相电压近似对称,其控制方法利用新型的三维空间矢量脉宽调制(3D-SVPWM),CLARK和PARK坐标变换的闭环控制。通过MATLAB的仿真试验,验证了三相四桥臂在一定程度上能够解决不平衡负载下输出三相对称电压的问题。Traditional three- leg inverter can output three- phase symmetrical voltage in the case of three- phase symmetrical load. But it is difficult to output three- phase symmetrical voltage when the three- phase load is asymmetric. This new inverter can effectively suppress the unbalanced load current to voltage disturbances under the unbalanced load,to ensure approximately symmetrical three- phase voltage output. The control method adopts the new type of three- dimensional space vector pulse width modulation（ 3D- SVPWM）,and the coordinate transformation of CLARK PARK closed- loop control. Through the simulation of MATLAB,it is verified that the three-phase four- leg can solve three phase output voltage problems when the three- phase load is asymmetric.

关 键 词：不平衡负载 三相四桥臂逆变器 三维空间矢量调制 

分 类 号：TM464[电气工程—电器]