基于准Z源DC-DC变流器的闭环控制建模分析  

Modeling and Analysis of Closed Loop Control Based on Quasi-Z Source DC-DC Converter

作　　者：赵扬 霰佳铭 ZHAO Yang;XIAN Jiaming(Huadian Dongying Energy Co.,Ltd.,Dongying 257100,China;Sichuan University,Chengdu 610000,China)

机构地区：[1]华电东营能源有限公司,山东东营257100 [2]四川大学,四川成都610000

出　　处：《电工技术》2020年第13期4-7,共4页Electric Engineering

摘　　要：电路中的诸多扰动如输入电压波动、输出负载变化均会影响输出电压的波形,使电路不能保持一个稳定的电压输出。对此,采用状态平均法和扰动法搭建出小信号模型,推导出传递函数,建立基于准Z源变流器的双闭环控制系统。通过控制T型网络中的电容器两端的电压,间接实现输出稳定电压的目标,保障该电路的输出电能质量。最后,利用MATLAB/Simulink软件搭建仿真电路,验证了该控制系统的抗扰动能力和实用性。Because there are many disturbances in the circuit,such as the fluctuation of input voltage and the change of output load,which will affect the output voltage waveform,the circuit cannot maintain a stable voltage output.To solve this problem,the state average method and disturbance method were used to build a small signal model,deduce the transfer function,and build a double closed-loop control system based on Quasi-Z source converter.By controlling the voltage at both ends of the capacitor in the T-type network,the goal of output stable voltage was achieved indirectly,and the output power quality of the circuit was guaranteed.Finally,the anti-disturbance ability and practicability of the control system were verified by using MATLAB/Simulink software to build simulation circuit.

关 键 词：准Z源变流器 传递函数 双闭环控制 稳定电压 

分 类 号：TM461[电气工程—电器]