提升并联运行并网逆变器效率的功率分配方法  

Power Allocation Method for Improving Efficiency of Grid-connected Inverters Under Parallel Operation

作　　者：姜卫东[1] 皋艳[1,2] 丁星星 马炜程[2] 廖玉茗 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽省合肥市230009 [2]合肥工业大学宣城校区信息工程系,安徽省宣城市242000

出　　处：《电力系统自动化》2017年第19期120-127,158,共9页Automation of Electric Power Systems

摘　　要：针对并联运行逆变器单元转换效率不同引起的功率损耗问题,提出了一种实现系统效率优化的功率分配方法。首先,建立了逆变器单元的功率模型,从理论上证明了该方法可以获得较高的系统效率;其次,通过测量的电气量计算得到系统效率,借助爬山法实现在线寻优;再次,通过MATLAB仿真验证了该功率分配方法的可行性;最后,在实验室搭建两个逆变器并联运行的实验平台,进行相关实验,验证了所提出的优化功率分配方法的可行性和有效性。As parallel connection for multiple inverters can effectively increase the system level,when considering the total power loss caused by different power conversion efficiency,an improved power allocation method is proposed. First,the power model of each inverter is built to prove higher system efficiency can be achieved with the improved power allocation method in theory. Secondly,the system efficiency can be calculated with easily measurable electric parameters to achieve online optimization by adopting the mountaineering method. Thirdly,the feasibility of the improved power allocation method is verified with MATLAB/Simulink software.Finally,the experimental platform of parallel inverters is built in the laboratory to verify the feasibility and effectiveness of this method by experiment.

关 键 词：功率分配 效率优化 并联逆变器 功率损耗 

分 类 号：TM464[电气工程—电器]