三相逆变器并联的模型预测直接磁链控制  

Model Predictive Direct Flux Control of Parallel Three-phase Inverters

作　　者：胡朦朦 吴雷 HU Mengmeng;WU Lei(Ministry of Education Key Laboratory for Light Industry Advanced Process Control,Jiangnan University,Wuxi 214122,Jiangsu,China)

机构地区：[1]江南大学轻工过程先进控制教育部重点实验室,江苏无锡214122

出　　处：《电气传动》2017年第8期25-28,共4页Electric Drive

基　　金：江苏省产学研创新项目(BY2012069)

摘　　要：针对传统的PQ下垂控制存在频率和电压降落等问题,引入虚拟磁链,对有功功率分配采用相角下垂控制,无功功率采用磁链下垂控制,并将下垂控制与三相逆变器的模型预测控制相结合,利用模型预测直接磁链控制,对下垂控制器输出的参考磁链和相角进行跟踪控制,该方法无需PI调节器和脉宽调制器,不仅能够实现各并联逆变器对负载功率的精确分配,提高系统的频率特性,而且显著改善了逆变器并联系统的动态特性。仿真和实验验证了所提方法的正确性和可行性。Aiming at the problems of conventional droop method,such as frequency and voltage deviations,virtual flux was introduced to the droop controller.The active power and the reactive power were allocated by drooping the phase angle and virtual flux respectively,moreover,the droop control and the model predictive control of the three?phase inverter were combined,and the output reference flux and phase of the droop controller were tracked by the model predictive direct flux contro(l MPDFC)which avoided the use of PI controllers and PWM modulators.While the load power between parallel inverters could be divided equally,and the frequency characteristics of the system was improved and the dynamic characteristics of parallel inverter system was improved significantly.The proposed method is verified by simulation and experiment.

关 键 词：逆变器并联 虚拟磁链下垂 模型预测 直接磁链控制 

分 类 号：TM464[电气工程—电器]