Solar photovoltaic power conversion using modular multilevel inverter

2015 International Conference on Emerging Research in Electronics, Computer Science and Technology (ICERECT) Pub Date : 2015-12-01 DOI:10.1109/ERECT.2015.7499046

S. Swetha, B. V. Sumangala

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引用次数: 2

Abstract

This project proposes an improved phase disposition pulse width modulation for a modular multilevel inverter which is used for a photovoltaic grid connection. Here modular multilevel inverter is used as an interface between photovoltaic panel and grid. Modular multilevel inverters has been increased in the recent years due to its advantages such as better harmonic profile, reduced EMI, staircase waveform. This phase disposition pulse width modulation is based on selective virtual loop mapping method to achieve capacitor voltage balance in lower and upper arms of MMI. The concept of virtual submodule is established first, by changing the mapping routines between virtual submodules and real sub modules, the capacitor voltages of the upper/lower arms capacitors can be well balanced. This method does not require sorting of voltages from highest to lowest, it just picks the MIN and MAX capacitor voltages of sub modules. The percentage THD values of the multilevel inverter are analyzed by using PI control scheme and Fuzzy Logic Control scheme. Simulation has been carried out using MATLAB/SIMULINK.

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太阳能光伏电源转换采用模块化多电平逆变器

本项目提出了一种改进的相位配置脉宽调制用于光伏并网的模块化多电平逆变器。这里采用模块化多电平逆变器作为光伏板与电网之间的接口。近年来，模块化多电平逆变器因其具有谐波分布更好、EMI降低、阶梯波形等优点而得到了广泛的应用。该相位配置脉宽调制基于选择性虚环映射方法，实现了MMI上下臂电容电压平衡。首先建立虚拟子模块的概念，通过改变虚拟子模块与实子模块之间的映射程序，可以很好地平衡上下臂电容器的电容电压。这种方法不需要从最高到最低的电压排序，它只是选择子模块的最小和最大电容电压。采用PI控制方案和模糊逻辑控制方案对多电平逆变器的THD百分比值进行了分析。利用MATLAB/SIMULINK进行了仿真。

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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来源期刊

2015 International Conference on Emerging Research in Electronics, Computer Science and Technology (ICERECT)

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