基于统一调制法的三电平SVPWM简化策略

欧阳森; 马文杰

欧阳森,马文杰.基于统一调制法的三电平SVPWM简化策略[J].电测与仪表,2019,56(16):19-25.
ouyangsen,mawenjie.A simplified three level SVPWM strategy based on unified modulation method[J].Electrical Measurement & Instrumentation,2019,56(16):19-25.

基于统一调制法的三电平SVPWM简化策略

A simplified three level SVPWM strategy based on unified modulation method

DOI：10.19753/j.issn1001-1390.2019.016.004

中文关键词: SVPWM 三电平逆变器 PSCAD

英文关键词:SVPWM, three-level inverter, PSCAD

基金项目:广东省自然科学基金（2016A030313476）

作者中文名	作者英文名	单位
欧阳森	ouyangsen	华南理工大学电力学院
马文杰	mawenjie	华南理工大学电力学院

摘要点击次数: 1642

中文摘要:

传统三电平空间矢量脉宽调制(Space Vector Pulse Width Modulation, SVPWM)的实现需要经过多重区域判断以及需要较多的三角函数运算，计算量较大，且需要预先存储大量的数据表格，加重了微处理器的负担。因此，为降低三电平SVPWM的算法复杂度，避免三角函数计算，提出一种基于统一电压调制法的简化实现策略。首先，根据统一调制思想，详细阐述了两电平SVPWM的等效实现方法；然后，以前述两电平SVPWM算法为核心，通过矢量分解将三电平转化为两电平来简化三电平SVPWM的实现；最后，将该简化调制策略应用于二极管钳位型三电平逆变器的仿真与实验控制，所得仿真与实验结果验证了所提算法的正确性与可行性。

英文摘要:

The traditional three-level space vector pulse width modulation（SVPWM）algorithm needs a great deal of calculation. To achieve the simple implementation of the three-level SVPWM algorithm, a simple algorithm, based on unified voltage modulation, is proposed in this paper. Firstly, a simplified two level SVPWM algorithm is introduced in detail. Then, the method of converting the three level to the two level is discussed. Finally, a custom model is built in PSCAD/EMTDC to implement the simplified three level SVPWM algorithm, and it is applied to the simulation control of three-level photovoltaic inverter. The simulation and experimental results verify the effectiveness of the proposed algorithm.

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