基于附加调制电压的链式逆变器直流电压平衡控制  

DC Voltage Balance Control of Cascade Multilevel Inverter Based on Modulating Voltage Superposition

作　　者：罗超[1] 肖湘宁[1] 陈征 陶顺[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]国网节能服务有限公司,北京100052

出　　处：《华北电力大学学报（自然科学版）》2016年第4期27-33,共7页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51207051);中央高校基本科研业务费专项资金资助项目(2015XS13)

摘　　要：首先推导了稳态情况下链式逆变器各子模块直流电容电压变化量与附加调制电压的数学关系式,揭示了基于附加调制电压的直流电压平衡控制策略的控制原理,并指出了其三种控制方式,对其控制复杂度、解耦特性、调节能力进行了分析。基于无功电流分量定向的附加调制电压的控制方式,分析了控制参数与均压效果的定量关系,给出了链式逆变器子模块直流电压均衡控制策略及控制参数的设计思路。最后,采用PSCAD/EMTDC建立了仿真模型,仿真结果表明了相关分析的正确性。In this paper,mathematical relational expression between DC voltage variation of each module and superimposed modulating voltage is deduced,which reveals the principle of DC voltage balance control of cascade multilevel inverter based on modulating voltage superposition. Furthermore,three control modes are proposed meanwhile,the complexity,decoupling characteristic and adjustment ability of each mode are analyzed. Based on superimposed modulating voltage orientated on reactive current,quantitative relationship between the control parameters and balance effect is derived and the design method of DC Voltage balance control strategy is carried out. Finally,simulation,based on PSCAD / EMTDC,is established,and results demonstrate the validity of the analysis.

关 键 词：链式逆变器 直流电压平衡 附加调制电压 无功电流定向 分层控制 

分 类 号：TM464[电气工程—电器]