一种具有中点平衡能力的双矢量调制策略  

A Dual-vector Modulation Strategy With Midpoint Balance

作　　者：王付胜[1] 肖俊[1] 周银银[1] 

机构地区：[1]合肥工业大学,安徽合肥230009

出　　处：《电力电子技术》2014年第11期10-12,共3页Power Electronics

摘　　要：直流侧电容电压不平衡是二极管中点箝位型(NPC)或T型三电平逆变器的固有问题,这里提出一种双矢量调制策略,不但具有完全中点电位平衡能力,且在一定工作区间内还可降低开关损耗。此处首先介绍三电平矢量图的区间划分方法;接着提出双矢量的合成思想并定量分析其中点平衡机理;在此基础上进一步推导出这里所提矢量调制策略的载波实现方法,以便于工程应用;最后,通过仿真和实验验证了这里所提调制策略的可行性和有效性。The imbalance of DC capacitor voltage is inherent problems in the neutral point clamped（NPC） diode-type or T-type three-level inverters,this paper presents a dual-vector modulation strategy,this method has the ability to completely balance the neutral point potential,and reduces switching losses in a certain range.This paper firstly introduces the three-level vector interval division,then proposes the dual-vector modulation method and analyses the midpoint balance principle quantitatively.Based on this,the carrier vector modulation strategy method is deduced for engineering applications.At last,this paper proves the feasibility of the proposed modulation strategy and effectiveness by simulation and experiments.

关 键 词：逆变器 中点平衡 双矢量调制 

分 类 号：TM464[电气工程—电器]