基于无差拍多台并联逆变器环流抑制方法研究  

Research on Circulating Currents Suppression Method Based on Deadbeat in Multi-parallel Inverters

作　　者：赵美丽[1] 刘慧文[2] 

机构地区：[1]鄂尔多斯职业学院机械工程系,内蒙古鄂尔多斯017000 [2]内蒙古工业大学电力学院,内蒙古呼和浩特010080

出　　处：《电气传动》2017年第12期89-92,共4页Electric Drive

摘　　要：提出一种基于无差拍和协调控制策略的零序环流控制多台逆变器并联系统。首先建立多台并联逆变器的零序环流模型,通过模型发现零序环流不仅和参数有关,而且和其它并联逆变器环流有关。为了消除零序环流影响,提出基于无差拍和协调策略的零序环流抑制方法,该方法通过改变零矢量作用时间实现零序环流抑制。实验验证了所提方法在输出电流不相等情况下均具有很好的抑制效果。A deadbeat and coordinate control for zero-sequence circulating currents suppression in multi-parallel inverters was proposed. First,the model of zero-sequence circulating current in the N-paralleled inverters was derived.It was shown that the circulating current was not only susceptible to the mismatches of circuit parameters,but it was also influenced by the interactions of circulating current controllers used by other paralleled inverters. To eliminate these zero-sequence circulating currents,a coordinate and deadbeat control strategy for N-paralleled inverter was proposed. Zero-sequence circulating currents were suppressed by adjusting the dwell time of zero vector. An effective mitigation of circulating current is demonstrated for the paralleled inverters under the unequal output currents conditions.

关 键 词：并联逆变器 协调控制 空间矢量调制 零序环流控制 

分 类 号：TM464[电气工程—电器]