级联H桥型SVG的控制策略研究  

Research on Control Strategy for Cascade H-bridge SVG

作　　者：刘旭强 智泽英[1] 安旭涛 陈治强 Liu Xuqiang;Zhi Zeying;An Xutao;Chen Zhiqiang(College of Electronic Information Engineering,Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China;Department of Electrical Engineering, Shanxi University, Taiyuan Shanxi 030013, China)

机构地区：[1]太原科技大学电子信息工程学院,山西太原030024 [2]山西大学电力工程系,山西太原030013

出　　处：《电气自动化》2019年第2期4-7,共4页Electrical Automation

摘　　要：针对静止无功发生器(static var generator,SVG)在无功补偿时存在直流侧电压不平衡和系统不稳定性等问题,在级联型H桥逆变器的基础上,建立了星型链式SVG的数学模型,构建了双闭环控制系统,其中电流内环采用PI解耦控制,电压外环采用分层控制,解决了直流侧电容电压的平衡问题,实现了系统的稳定工作。最后,在MATLAB/Simulink中构建了系统的仿真模型。仿真结果表明,所提出的控制方法具有较好的补偿效果和快速的动态性能。In order to solve unbalanced DC voltage and system instability of the static var generator (SVG) during reactive compensation, a chained star type SVG mathematical model was established based on the cascaded H-bridge inverter, and a double closed-loop control system was constructed with the inner current loop controlled by PI decoupling and the outer voltage loop adopting stratification control, thus achieving balance between capacitance and voltage at the DC side and realizing stable system operation. Finally, a simulation model of the system was constructed in MATLAB/Simulink. The simulation results showed that the proposed control method had quite good compensation effect and fast dynamic performance.

关 键 词：静止无功发生器(SVG) 双闭环解耦控制 直流电压平衡 无功补偿 PI控制 

分 类 号：TM714.3[电气工程—电力系统及自动化]