电网技术Issue(1)：3768-3776,9.DOI:10.13335/j.1000-3673.pst.2014.01.026
三电平NPC变流器虚拟空间矢量调制策略与载波调制策略的内在关系研究
Research on Internal Relation Between Virtual Space Vector Pulse Width Modulation Strategy and Carrier Sinusoidal Pulse Width Modulation Strategy for Three-Level Neutral Point Clamped Converter
摘要
Abstract
In the modulation strategies for three-level NPC converter, neutral point voltage control under the entire modulation index and full power factor can be achieved by virtual space vector pulse width modulation (VSVPWM) strategy. In this paper the basic principle of VSVPWM is analyzed, then the internal relation between three-level VSVPWM strategy and single-phase dual modulation based three-level sinusoidal pulse width modulation (SPWM) strategy is derived and the modulation-wave equivalence between the two modulation strategies is established. Using the established modulation-wave equivalent relation, the total harmonic distortion (THD) of output voltage, DC voltage utilization rate and switch device losses under VSVPWM strategy are analyzed. Finally, a fast implementation of three-level VSVPWM strategy based on modulation-wave equivalence is proposed. The correctness of the theoretical analysis is verified by both results from simulation and experiments.关键词
三电平NPC变流器/VSVPWM/SPWM/调制波等效Key words
three-level NPC converter/VSVPWM strategy/SPWM strategy/modulation-wave equivalence分类
信息技术与安全科学引用本文复制引用
李宁,王跃,蒋应伟,雷万钧,王兆安..三电平NPC变流器虚拟空间矢量调制策略与载波调制策略的内在关系研究[J].电网技术,2014,(1):3768-3776,9.基金项目
国家863高科技基金项目(2012AA050206)。@@@@Project Supported by the National High Technology Research and Development of China 863 Program (2012AA050206) （2012AA050206）
