级联多电平准Z源逆变器的无差拍并网控制策略  

Deadbeat grid-connected control strategy of quasi-Z-source cascaded multilevel inverter

作　　者：游云峰 李媛[1] 方番 杨翔宇 YOU Yunfeng;LI Yuan;FANG Fan;YANG Xiangyu(College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

机构地区：[1]四川大学电气工程学院

出　　处：《电力系统保护与控制》2019年第17期48-53,共6页Power System Protection and Control

基　　金：国家自然科学基金项目资助(51707126)~~

摘　　要：以单项级联准 Z 源逆变器为研究对象,以提高动态响应速度和减小并网电流总谐波畸变率为研究目标,提出一种总分式无差拍并网控制策略。首先,针对级联型准 Z 源逆变器各模块输入功率有差异的特点,定义模块功率比例因子并将其应用于模块功率控制,实现各模块差异化功率分配和最大功率输出,并实现各模块直流链电压平衡。其次,建立并网电流与系统反馈状态量模型,采用无差拍控制策略实现并网电流快速控制。最后,通过建立仿真模型验证了所提算法的有效性和正确性。In order to improve the dynamic response speed and reduce the total harmonic distortion of grid-connected current of the single-phase quasi-Z-Source Cascaded Multilevel Inverter (qZS-CMI), a total fraction deadbeat grid-connected control strategy is proposed. Firstly, for the difference of input power of each module of the cascaded quasi-Z source inverter, the module power scaling factor is defined and applied to the module power control to realize the module differentiated power distribution and maximum power output, and realize DC-link voltage balance of each module. Secondly, the grid-connected current and system feedback state quantity model is established, the deadbeat control strategy is used to realize the grid-connected current fast control. Finally, the effectiveness and correctness of the proposed algorithm are verified by the simulation model.

关 键 词：准Z源逆变器 并网 无差拍控制 级联多电平 

分 类 号：TM464[电气工程—电器]