摘要
随着大量分布式电源投入电网,分压式模块化多电平直流变换器(DC-MMC)得到广泛应用。针对模块化多电平变换器控制系统多输入多输出、强耦合非线性的特点,推导变换器拓扑数学模型,建立此类拓扑的电流和能量模型,提出一种基于反演控制的双闭环解耦控制方法。通过消除系统之间的耦合,采用模型反演理论对所建解耦模型进行控制,实现桥臂电流保持稳定并交流分量最小化,增强系统的抗扰动能力。在Matlab/Simulink中搭建DC-MMC双闭环模型,分析表明闭环控制模型具有良好的跟踪效果和调控特性,验证了提出的控制策略控制桥臂电流及高低压侧电流的可行性和有效性,为解耦控制的应用提供了参考依据。
With a large number of distributed power supplies put into the grid,divided-voltage DC-modular multilevel converter(DCMMC)has been widely used.Based on the characteristics ofmultiple input,multiple output,strong coupling and nonlinear of modular multilevel converter system,a converter topology mathematical model is deduced,a current and energy topology model is established,and a double closed-loop decoupling control method based on backstepping of control is proposed in this paper.By eliminating the decoupling in the system,the model backstepping theory is adopted to control the decoupling model.The current of the bridge arm is kept stable and the AC component is minimized to enhance the anti-disturbance ability of the system.The DC-MMC double closed-loop model is built in Matlab/Simulink.The results show that the closed-loop control model has good tracking effect and regulation characteristics,which verifies the feasibility and effectiveness of the proposed control strategy when controlling the current of the bridge arm and the current of the high and low voltage sides,providing a reference for the application of decoupling control.
作者
马文忠
赵雨
张彦
张奎同
韩嘉
王昕睿
王嘉星
Ma Wenzhong;Zhao Yu;Zhang Yan;Zhang Kuitong;Han Jia;Wang Xinrui;Wang Jiaxing(Insitute of New Energy,China University of Petroleum(East China),Qingdao 266580,China;Shandong Energy Group Co.,Ltd.,Ji’ning 273500,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2023年第1期485-492,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51777216)
山东省自然科学基金(ZR2018MEE040,ZR2019MEE094)。
关键词
直流-直流变换器
绝缘栅双极晶体管
控制系统分析
反演控制
解耦控制
DC-DC converters
insulated gate bipolar transistors(IGBT)
control system analysis
backstepping control
decoupling control
