三电平NPC变流器SVPWM策略与SPWM策略的等效关系研究

发布时间：2018-05-31 22:17

本文选题：三电平NPC变流器 + SPWM策略　；参考：《电网技术》2014年05期

【摘要】：调制策略是三电平中点钳位(neutral point clamped,NPC)变流器的关键技术之一。三电平查表法空间矢量脉宽调制(space vector pulse width modulation,SVPWM)策略实现复杂,为此,基于三电平正弦波脉宽调制(sinusoidal pulse width modulation,SPWM)策略与SVPWM策略的基本原理,提出了2种三电平SVPWM策略的快速等效实现方案,即调制波等效方案和导通时间等效方案。调制波等效方案研究三电平SVPWM策略的等效调制波,而导通时间等效方案则通过三电平SPWM策略作用下各开关管导通时间计算三电平SVPWM策略对应各开关管导通时间,研究结果验证了三电平SVPWM策略2种等效方案的理论一致性。仿真和实验表明所提2种三电平SVPWM策略的快速等效方案具有实现简单、计算时间少,结果更精确的特点。
[Abstract]:Modulation strategy is one of the key technologies of three-level neutral point clamped NPCs. The implementation of space vector pulse width modulation (vector pulse width) strategy is complicated by three-level look-up table method. Therefore, based on the basic principle of three-level sinusoidal pulse width modulation strategy and SVPWM strategy, Two fast equivalent schemes of three-level SVPWM are proposed, that is, the equivalent scheme of modulation wave and the equivalent scheme of turn-on time. The equivalent modulation wave of three-level SVPWM strategy is studied. The turn-on time equivalent scheme of three-level SVPWM strategy is used to calculate the on-on time of each switching tube under the action of three-level SPWM strategy, and the on-on time of each switching tube is calculated by the three-level SVPWM strategy under the action of the three-level SPWM strategy. The research results verify the theoretical consistency of the two equivalent schemes of three level SVPWM strategy. Simulation and experiments show that the proposed two fast equivalent schemes of three-level SVPWM have the advantages of simple implementation, less computation time and more accurate results.
【作者单位】：西安交通大学电气工程学院;
【基金】：国家863高科技基金项目(2012AA050206) 新世纪优秀人才支持计划项目~~
【分类号】：TM46

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