A novel single phase multilevel inverter with single photovoltaic source and less number of switches

2014 2nd International Conference on Devices, Circuits and Systems (ICDCS) Pub Date : 2014-03-06 DOI:10.1109/ICDCSYST.2014.6926189

M. Ranjana, P. K. Maroti, B. Revathi

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引用次数: 11

Abstract

In this paper a novel single phase multilevel inverter with single photovoltaic (PV) source and less number of switches is proposed. Photovoltaic based high power applications needs a multilevel inverter (MLI) with multiple sources to convert DC to AC. Conventional multilevel inverters required large number of capacitors, diodes, power switches and input sources. In order to overcome this drawback, proposed single phase MLI can be employed. Proposed MLI have single source and less number of switches, diodes and capacitors. Thus proposed MLI reduces the complexity of circuit design. In this paper, 9-Level MLI is proposed for photovoltaic applications with level shifting SPWM (sinusoidal pulse width modulation) technique. Proposed 9-level MLI is designed with rated power 2KW, 0.8 modulation index, 60V input supply. Total harmonic distortion (THD) of 9-level output voltage with LC filter and without LC filter is 4.56% and 17.29% respectively. The simulation results confirm the operation of proposed 9-level MLI and simulation is carried out in MATLAB/SIMULINK.

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一种新型的单光伏源、少开关的单相多电平逆变器

本文提出了一种新型的单光伏电源、少开关的单相多电平逆变器。基于光伏的大功率应用需要具有多源的多电平逆变器(MLI)来实现直流到交流的转换，而传统的多电平逆变器需要大量的电容器、二极管、电源开关和输入源。为了克服这一缺点，可以采用所提出的单相MLI。所提出的MLI具有单一电源和较少数量的开关、二极管和电容器。从而降低了电路设计的复杂性。本文提出了一种基于水平移位SPWM(正弦脉宽调制)技术的9电平MLI。所设计的9级MLI额定功率为2KW，调制指数为0.8，输入电源为60V。带LC滤波器和不带LC滤波器的9电平输出电压的总谐波失真(THD)分别为4.56%和17.29%。仿真结果证实了所提出的9级MLI的有效性，并在MATLAB/SIMULINK中进行了仿真。

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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2014 2nd International Conference on Devices, Circuits and Systems (ICDCS)

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