电源学报2016，Vol.14Issue(5)：96-104,9.DOI:10.13234/j.issn.2095-2805.2016.5.96
一种新的三电平NPC变换器中点电位平衡控制策略
A New Neutral Voltage Balance Control Strategy of Three-level NPC Inverter
摘要
Abstract
NPC three-level converter has more advantages compared with traditional two level converter, but its special topology also brings neutral voltage imbalance. On the basis of simplified three-level space vector pulse width modulation (SVPWM)algorithm and the virtual space vector, a mixed strategy about controlling neutral voltage is put forward. Namely under the low modulation index environment, the simplified three-level space vector algorithm is chosen, and with reference to the actual situation of neutral voltage and neutral current to determine how to select overlapping sectors' affiliation or change switch vector sequences of seven section;under the high modulation index environment, the strategy of virtual space vector is used to suppress the excursion of neutral voltage. Finally, the model is built and simulatied in Matlab, the result proves that this control method can obviously suppress the excursion of neutral voltage under the low modulation index and high modulation index environment.关键词
中点电位不平衡/简化三电平SVPWM/虚拟空间矢量/调制度Key words
neutral voltage imbalance/simplified three-level SVPWM/virtual space vector/modulation degree分类
信息技术与安全科学引用本文复制引用
李兴,靳斌,熊明,王建林..一种新的三电平NPC变换器中点电位平衡控制策略[J].电源学报,2016,14(5):96-104,9.基金项目
春晖计划资助项目（Z2014076）；四川省教育厅基金资助项目（13ZA0024） Project Supported by Spring Sunshine Plan (Z2014076) （Z2014076）
Fund Project of Sichuan Provincial Department of Education (13ZA0024) （13ZA0024）
