模块化UPS瞬时均流控制策略研究  

Research on the Instantaneous Current-sharing Control Strategy for Modular UPS

作　　者：徐裕勇 吴佳楠[2] XU Yu-yong;WU Jia-nan(Jinglang Intelligent Equipment(Zhongshan)Co.,Ltd.,Zhongshan 528437,China;不详)

机构地区：[1]京琅智能装备(中山)有限公司,广东中山528437 [2]电子科技大学中山学院,广东中山528402

出　　处：《电力电子技术》2020年第11期54-58,共5页Power Electronics

摘　　要：随着功率开关器件速度的提升及数字信号控制器普及化应用,环路响应快,精度高的多逆变器并联系统瞬时电流均流方式基本上代替了基于相位的均流控制方式。为了在控制上实现起来更加简单,在此详细分析了在电压闭环控制的基础上,引入基于虚拟阻抗瞬时环流反馈,并将该虚拟阻抗配置为纯阻性的控制策略。最后详细分析了该均流控制策略的稳定性和虚拟电阻的不同阻值对均流性能的影响。分析表明,通过合理配置该阻值可以实现良好的瞬时均流调节特性。仿真与实验结果验证了所提均流控制策略效果良好。Absract:With the speed increase of power switching devices and the popularization of digital signal controllers,the instantaneous current-sharing method of a multi-inverter parallel system with fast loop response and high accuracy basically replaces the phase-based current-sharing control method.In order to achieve simpler control,it analyzes in detail on the basis of voltage closed-loop control,introduces instantaneous circulating current feedback based on virtual impedance,and configures the virtual impedance as a purely resistive control strategy.Finally,the stability of the current sharing control strategy and the influence of different resistance values of the virtual resistor on the current sharing performance are analyzed in detail.The analysis shows that by properly configuring the resistance value,a good instantaneous current-sharing regulation characteristic can be achieved.Simulation and experimental results validate the feasibility of the proposed current-sharing control method.

关 键 词：逆变器并联 瞬时均流 虚拟阻抗 

分 类 号：TM464[电气工程—电器]