基于时变相量小信号模型的逆变器并联控制系统分析与设计  

Analysis and Design of for Paralleled Inverter System Based on the Small Signal Model Using Time-varying Phasor

作　　者：高范强[1] 王平[1] 李耀华[1] 李子欣[1] 朱海滨[1] 胜晓松[1] 董贯洁[1] 

机构地区：[1]中国科学院电力电子与电气驱动重点实验室(电工研究所),北京市海淀区100190

出　　处：《中国电机工程学报》2011年第33期75-84,共10页Proceedings of the CSEE

摘　　要：在逆变器无线并联系统中,下垂控制器的参数会影响功率均分的动态响应和稳定性。传统的方法是利用准稳态相量的小信号模型来辅助设计下垂控制器。然而,交流信号的准稳态相量在分析动态响应较快的逆变器并联系统时会受到局限。以使用下垂控制的400 Hz逆变器并联系统为研究对象,建立该系统基于时变相量的小信号模型。理论分析表明,传统的小信号模型在设计并联系统参数时有局限性。与传统的模型相比,所建立的基于时变相量的小信号模型考虑了下垂调节的暂态过程,解释了传统模型扩大了系统参数选择范围的原因,并对并联系统的参数提供了更加精确的选择范围。仿真和实验结果验证了该小信号模型的准确性。The coefficients of the droop controller influence the transient response and the stability of the wireless paralleled inverter system. Traditional design of the droop controller is usually accompanied by the small signal model based on the quasi-stationary phasor. However, the quasi-stationary phasor representation of sinusoidal signals is limited in analyzing the faster response of paralleled inverter system. This paper focuses on the parallel operation of 400 Hz inverters which employ the droop controller. A small signal model which based on the time-varying phasor of this system is built. The theoretical analyses show that the traditional small signal model is limited in designing the parameters of the paralleled inverter system. Compared with the traditional small signal model, the small signal model based on the time-varying phasor can reflect the transient processes of the droop regulating. Therefore, the parameters of the paralleled system can be designed more accurate with the small signal model in this paper. The validity of the proposed model is proved by the simulation and experimental results.

关 键 词：时变相量 小信号模型 下垂控制 400Hz逆变 器 并联控制 

分 类 号：TM46[电气工程—电器]