A software tool for selective harmonic elimination in multilevel inverters using Mathematica and Visual C++

2011 Nirma University International Conference on Engineering Pub Date : 2011-12-01 DOI:10.1109/NUICONE.2011.6153286

S. Sangeetha, S. Jeevananthan

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引用次数: 4

Abstract

This paper suggests a programming tool to calculate the switching angle required for eliminating the selected harmonics in a multilevel inverter (MLI). A systematic analysis and algorithm based off-line precalculation of switching angle for a range of modulation index using resultant theory is presented. The polynomial reduction is supported by Mathematica 6 and the accurate computation of switching instants is done by developing a tool in Visual C++ with an user friendly interface. The software tool objective is of twofold. The first one is to reduce the lower order dominant harmonics and second one is to minimize the total harmonic distortion (THD). The program developed is first of its kind, and can be successfully applied to n-level MLI. The efficient algorithm calculates all the possible triplent roots in a single step for a given input. Representative discussion and results are presented for a seven level cascaded inverter to eliminate the third, fifth and seventh harmonics. The triumph of the algorithm is validated by using Matlab/Simulink toolbox.

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用Mathematica和visualc++编写的多电平逆变器选择性谐波消除软件

本文提出了一种编程工具来计算多电平逆变器中消除所选谐波所需的开关角。提出了一种基于合成理论的调制指数范围开关角离线预计算的系统分析和算法。在Mathematica 6中支持多项式约简，并在Visual c++中开发了一个具有友好界面的工具，实现了切换瞬间的精确计算。软件工具的目标是双重的。一是降低低阶主导谐波，二是减小总谐波失真(THD)。开发的程序是同类程序中第一个，可以成功地应用于n级MLI。对于给定的输入，高效的算法在一个步骤中计算所有可能的三重根。给出了一种七电平级联逆变器消除三、五、七次谐波的代表性讨论和结果。通过Matlab/Simulink工具箱验证了该算法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 Nirma University International Conference on Engineering

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