摘要
针对Z源逆变器存在非最小相位现象,使得在输入出现扰动时Z源电容电压以及直流链电压会跟随出现超调和振荡的问题,提出了构建滑模控制器来控制逆变器直流链电压的方法。首先,分析了Z源逆变器的工作原理。然后,设计了以电容电压误差的积分、电容电压误差以及电感电流为状态变量的直流链电压滑模控制器,并且推导了其等效控制率,分析了滑模面的存在可达性问题。最后,对传统PI控制和滑模控制的仿真和实验结果进行对比分析,结果表明,所构建的滑模控制器相对于传统PI控制器,动态响应快,稳定性高,抗干扰能力强。
Z source inverter has non - minimum phase phenomena, so that overshoot and oscillation will appear in Z source capacitor voltage and DC link voltage when the input disturbance occurs. To solve this problem, a method for constructing sliding mode controller to control the DC link voltage of inverter was proposed. Firstly, the working principle of Z source inverter was analyzed. Then, a DC link voltage sliding mode controller with integration of capacitor voltage error, capacitance voltage error and inductive current as state variable was designed, and its equivalent control rate was derived. The existence and accessibility problems of sliding surface were analyzed. Finally, the simulation and experimental results of traditional PI control and sliding mode control were compared and analyzed. The results show that compared with the traditional PI controller, the proposed sliding mode controller has fast dynamic response, high stability and strong anti -interference ability.
作者
肖蕙蕙
陈敏
陈艳
崔森
XIAO Hui - hui, CHEN Min, CHEN Yan, CUI Sen(College of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China)
出处
《计算机仿真》
北大核心
2018年第10期118-122,共5页
Computer Simulation
基金
国家自然科学基金(51607020)
重庆市教委科学技术研究项目(KJ1709209)
关键词
滑模控制
仿真
直流链电压
Sliding mode control
Simulation
DC link voltage
