Implementation of staircase modulation on a five level Cascaded H-Bridge multilevel inverter and interfacing with Photovoltaic modules

2015 International Conference on Power and Advanced Control Engineering (ICPACE) Pub Date : 2015-08-01 DOI:10.1109/ICPACE.2015.7274940

V. S. Kirthika Devi, R. Patrão, P. Sreekanth, Garima Ramole, A. Sreekumar

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引用次数: 4

Abstract

In this paper, design and implementation of staircase modulation technique on an existing topology of single phase five level Cascaded H-Bridge multilevel inverter using reduced number of switches is done. The existing Cascaded H-Bridge multilevel inverter has two sources and five switches thus reducing the total harmonic distortion and electromagnetic interference. The two sources being DC are replaced by Photovoltaic modules and are interfaced with the inverter through a closed loop Proportional Integral controlled Buck-Boost Converter. Implementation of closed loop Proportional Integral controller maintains a nearly constant output voltage from the Buck-Boost converter. Implementation of staircase modulation reduces the total harmonic distortion to the least possible and an LC filter at the AC output side of the inverter further reduces it drastically. The analysis has been done for both R and RL loads. The simulation is done using MATLAB/Simulink 2011 software in order to meet the objectives stated above.

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在五电平级联h桥多电平逆变器上实现阶梯调制并与光伏模块接口

本文在现有的单相五电平级联h桥多电平逆变器拓扑结构上设计并实现了阶梯调制技术，减少了开关数量。现有的级联h桥多电平逆变器具有两个源和五个开关，从而降低了总谐波畸变和电磁干扰。两个直流电源被光伏模块取代，并通过闭环比例积分控制的Buck-Boost变换器与逆变器连接。闭环比例积分控制器的实现使Buck-Boost变换器的输出电压几乎保持恒定。楼梯调制的实现将总谐波失真降低到最小，并且在逆变器的交流输出侧的LC滤波器进一步大大降低了谐波失真。对R和RL负载都进行了分析。为了达到上述目标，使用MATLAB/Simulink 2011软件进行仿真。

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2015 International Conference on Power and Advanced Control Engineering (ICPACE)

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