不同结构电压源换流器损耗对比分析  

Comparative analysis of losses of voltage source converters with different structures

作　　者：刘建涛[1] 王治华[2] 王珂[1] 

机构地区：[1]中国电力科学研究院,江苏南京210003 [2]上海市电力公司,上海200122

出　　处：《电力系统保护与控制》2013年第6期105-110,共6页Power System Protection and Control

基　　金：国家电网公司大电网重大专项资助项目课题(SGCC-MPLG001-2012)

摘　　要：IGBT直接串联两电平电压源换流器(2Level-VSC)和模块化多电平换流器(MMC)是目前比较主流的两种柔性直流输电换流器结构,其外特性相似,但损耗特性不同,从而影响两种换流器的经济性和适用场合。基于器件厂商提供的器件特性参数,提出了适用于两种换流器的损耗计算模型。在分析典型调制方式下两种换流器中各器件的工作状态的基础上,详细分析了两者的损耗计算方法,最后通过算例对2Level-VSC和MMC的损耗特性进行了定量的对比分析,结果表明相同工况下两种换流器的损耗特性不同,且各工况下MMC的损耗率低于两电平换流器。Two-level voltage source converter （2Level-VSC） with IGBTs directly in series and modular multi-level converter （MMC） are two kinds of the most mainstream converters used in flexible HVDC. Their external features are similar; however, their characteristics of loss are different, which affects their economy and applicable workplace. Based on the device parameters provided by the manufacturer, a general loss calculation model is proposed which is applicable to calculating the losses of both the converters. ThroUgh analyzing the working status of devices of the two kinds of converters, loss calculation methods of the two are analyzed in detail. Finally, loss characteristics of 2LeveI-VSC and MMC are analyzed quantitatively through examples. The results show that loss characteristics of the two kinds of converters are different, and the efficiency of MMC is higher than that of the 2Level-VSC with IGBTs directly in series under different conditions.

关 键 词：柔性直流输电 两电平换流器 模块化多电平换流器 损耗 

分 类 号：TM46[电气工程—电器]