Comparative Performance Evaluation of Multiport DC/AC Inverters for Distributed Generation Applications

2021 10th International Conference on Modern Circuits and Systems Technologies (MOCAST) Pub Date : 2021-07-05 DOI:10.1109/MOCAST52088.2021.9493345

I. Roditis, E. Koutroulis

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Abstract

Nowadays, renewable energy sources (RES) in combination with power systems having the capability of storing electric energy are increasingly used in distributed generation applications. Multiport DC/AC inverters are required for the integration of RESs and energy storage systems with the electric grid and local loads. Recently, a variety of multiport DC/AC inverter topologies have been reported in the literature. In this paper, a comparative study of various alternative non-isolated DC/AC three-port converter (TPC) topologies is performed, when they are used as the power electronic interface between photovoltaic arrays, battery energy storage units and the electric grid/load. This study focuses on the performance of these topologies in terms of the leakage ground current and the battery ripple current during charging and discharging in distributed generation systems. A comparative performance evaluation of the alternative multiport DC/AC inverter topologies has been performed in Matlab/Simulink for the case of a 2 kW distributed energy system and the simulation results are presented.

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分布式发电用多端口直流/交流逆变器性能比较评价

目前，可再生能源与具有储能能力的电力系统相结合，越来越多地应用于分布式发电。多端口DC/AC逆变器需要将RESs和储能系统与电网和本地负载集成在一起。最近，各种多端口DC/AC逆变器拓扑已在文献中报道。本文对不同的非隔离DC/AC三端口变换器(TPC)拓扑结构作为光伏阵列、电池储能单元和电网/负载之间的电力电子接口进行了比较研究。本文主要研究这些拓扑结构在分布式发电系统充放电过程中的漏地电流和电池纹波电流的性能。以2kw分布式能源系统为例，在Matlab/Simulink中对两种多端口直流/交流逆变器拓扑结构进行了性能比较评估，并给出了仿真结果。

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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2021 10th International Conference on Modern Circuits and Systems Technologies (MOCAST)

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