A Single DC-Source Five-Level Inverter Applied in Stand-Alone Photovoltaic Systems Considering MPPT Capability

2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC) Pub Date : 2019-02-01 DOI:10.1109/PEDSTC.2019.8697896

M. Farhadi‐Kangarlu, Milad Gavipanjeh Marangalu

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引用次数: 19

Abstract

This paper presents a single DC source five-level photovoltaic inverter topology for a stand-alone photovoltaic (PV) system. The proposed PV converter system consists of a five-level inverter and a buck DC-DC converter. The DC-DC converter that embedded in the inverter structure is used to realize the maximum power point tracking (MPPT) in various environmental conditions (temperature and irradiation). Also, as the studied system is stand-alone PV system, a battery energy storage system (BESS) is also included which consists of a bidirectional buck/boost DC-DC converter and a battery energy storage. The BESS is connected to a branch of the DC-link and controls the DC-link voltage while managing the battery energy. One of the main advantages of the proposed converter is that the buck DC-DC converter which is in-charge of MPPT, deals with partial power of the PV and hence the system efficiency would be improved. The simulation results using MATLAB/ SIMULINK confirm the performance of the proposed topology in different scenarios.

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考虑MPPT能力的单机光伏系统单直流五电平逆变器

提出了一种适用于独立光伏系统的单直流电源五电平逆变器拓扑结构。该系统由一个五电平逆变器和一个降压DC-DC变换器组成。在逆变器结构中嵌入DC-DC变换器，实现各种环境条件(温度和辐照)下的最大功率点跟踪(MPPT)。此外，由于所研究的系统是独立的光伏系统，因此还包括电池储能系统(BESS)，该系统由双向降压/升压DC-DC变换器和电池储能组成。BESS连接到直流链路的分支并控制直流链路电压，同时管理电池能量。所提出的变换器的一个主要优点是，负责MPPT的降压DC-DC变换器处理光伏的部分功率，从而提高了系统效率。利用MATLAB/ SIMULINK进行仿真，验证了所提拓扑在不同场景下的性能。

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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2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)

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