基于电压/电流控制模式的组合式三相逆变器  

Combined three-phase inverter operating in voltage or current control mode

作　　者：李立[1] 黄松柏[2] 汪洪亮[3] 

机构地区：[1]湖南工程学院电气信息学院,湖南湘潭411101 [2]黄石理工学院电气与电子信息学院,湖北黄石435003 [3]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《电机与控制学报》2011年第2期63-70,共8页Electric Machines and Control

基　　金：国家自然科学基金重点资助项目(50737004)

摘　　要：为满足逆变器负载短路而不停机的要求,提出正常情况输出恒定电压和异常情况下(如短路)输出电流恒定的2种模式相结合方案。基于组合式三相逆变器拓扑,分析得到带有LCL滤波器的逆变器等效拓扑,给出电压控制模式下PID加重复控制的控制策略和电流控制模式下状态反馈控制的复合控制策略。运用极点配置对PID控制和状态反馈系数进行设计,并阐述重复控制设计过程。2台400kVA/50Hz的逆变器并联系统表明该方案验证两种模式下较好的输出波形和相互切换的高可靠性。To prevent inverter stopping within load short-circuit,a hybrid scheme is proposed,which controls the output voltage being constant in voltage control model（VCM） and controls the output current is constant in current control model（CCM）.The equivalent inverter topology and mathematical models were obtained in two models for combined three-phase inverter.A hybrid control strategy was given.On the one hand,the PID control and the repetitive control were used in VCM to obtain the fast dynamic responses and low harmonic distortions.On the other hand,the state feedback control was used in CCM.Pole assignment was employed in designing parameter of the PID controller and state feedback,and the repetitive control design process was given.Experimental results using two 400KVA parallel inverters show that the proposed control scheme has excellent output waveform in state-steady operation and good reliability switching between VCM and CCM.

关 键 词：组合式三相逆变器 电压控制模式 电流控制模式 并联 状态反馈 极点配置 重复控制 

分 类 号：TM464[电气工程—电器]