电工技术学报2019，Vol.34Issue(2)：377-386,10.DOI:10.19595/j.cnki.1000-6753.tces.171605
基于动态空间矢量的三电平逆变器不连续调制策略
Discontinuous Modulation of Three-Level Inverter Based on Dynamic Space Vector
摘要
Abstract
Since the neutral point potential fluctuation of three-level inverter is difficult to suppress under discontinuous modulation strategy, a dynamic space vector strategy was proposed.This strategy could generate a dynamic space vector by real-time detecting the upper and lower capacitor voltages, and then accurately synthesize the reference vector.This paper adopted gh coordinate system and parity sector conversion method to reduce the complexity of the dynamics algorithm.In order to eliminate the neutral point potential offset, this paper also proposed a method of switching vector sequence with reverse effect on the neutral point potential in real time.Finally, the evaluation method of modulation strategy based on the error current vector was given, which verified the advantages of the dynamic space vector modulation.Simulation and experimental results further show the effectiveness of the proposed method.关键词
动态空间矢量/中点电位平衡/开关损耗/二极管中点钳位式三电平逆变器/误差电流分析Key words
Dynamic space vector/Neutral point potential balance/Switching loss/neutral point clamped (NPC) three level inverter/Error current analysis分类
信息技术与安全科学引用本文复制引用
曾江,杨林,黄骏翅,丘国斌..基于动态空间矢量的三电平逆变器不连续调制策略[J].电工技术学报,2019,34(2):377-386,10.基金项目
国家自然科学基金资助项目(51477055,51777078) （51477055,51777078）
