电力系统自动化2016，Vol.40Issue(24)：92-97,6.DOI:10.7500/AEPS20160509012
基于混合子模块的循环嵌套型模块化多电平换流器特性
Characteristic of Nested-loop Mechanism Based Modular Multilevel Converter Based on Hybrid Sub-modules
摘要
Abstract
Modular multilevel converter MMC has been widely applied in flexible high voltage direct current HVDC fields. In view of the problems that traditional half bridge sub-module HBSM cannot clear the DC side fault many new sub-modules with the ability of DC fault blocking have been proposed.Compared with half bridge sub-modules these new modules have additional blocking devices which increase the losses of converters in the case of huge output levels.The topology of nested-loop mechanism based MMC NLMMC has high level output ability and combined with the characteristics of topology structure a hybrid sub-module structure is put forward.Application to NLMMC shows that it gives the inverter not only the ability of DC fault blocking but also a high level output capacity which reduces the wastage of the converter indirectly.This paper starts with the working principle of the topology structure the modulation strategy is analyzed and a hierarchical voltage balance control strategy and the mechanism of fault blocking are discussed.Finally the capacity of level output loss features and ability of fault blocking are simulated through the PSCAD EMTDC simulation platform.关键词
循环嵌套机理/混合子模块/故障阻断/调制策略Key words
nested-loop mechanism/hybrid sub-module/fault blocking/modulation strategy引用本文复制引用
王振浩,宋金泊,韩子娇,董鹤楠,李扬..基于混合子模块的循环嵌套型模块化多电平换流器特性[J].电力系统自动化,2016,40(24):92-97,6.基金项目
国家电网公司科技项目(2014GW-05).This work is supported by State Grid Corporation of China No.2014GW-05 （2014GW-05）
