Basic sensitivity analysis of conversion losses in a DC microgrid

2012 International Conference on Renewable Energy Research and Applications (ICRERA) Pub Date : 2012-11-01 DOI:10.1109/ICRERA.2012.6477368

H. Kakigano, Y. Miura, T. Ise, J. Van Roy, J. Driesen

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引用次数: 20

Abstract

This paper presents a basic sensitivity analysis of the conversion losses in a dc microgrid by varying the system parameters. A simple residential apartment with 20 units with a photovoltaic (PV) system is taken for the analysis. The conversion losses are calculated with the measured electricity consumption and the estimated output of the PV system. Modelica, an object-oriented modeling language, was used as a simulation tool because of the flexibility in changing the system configuration and parameters. The simulation results show that the efficiencies of the converters in the system are almost directly proportional to the total system losses. Additionally, the rated capacity of the grid converter influenced the total losses linearly. It is also shown that the total rated capacity of the PV system has a relation to the advantages of dc microgrids compared to ac microgrids. These results reveal that the dc microgrid has an advantage regarding the loss reduction under suitable conditions. Additionally, this basic analysis will contribute to the design of system configurations and parameters for new dc microgrids.

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直流微电网转换损耗的基本敏感性分析

本文对直流微电网中转换损耗随系统参数变化的基本敏感性进行了分析。本文以一个拥有20套光伏系统的简单住宅公寓为例进行分析。利用实测的耗电量和光伏系统的估计输出来计算转换损耗。Modelica是一种面向对象的建模语言，由于可以灵活地更改系统配置和参数，因此被用作仿真工具。仿真结果表明，系统中变换器的效率几乎与系统总损耗成正比。此外，电网变流器的额定容量对总损耗有线性影响。研究还表明，光伏系统的总额定容量与直流微电网相对于交流微电网的优势有关。这些结果表明，在适当的条件下，直流微电网在降低损耗方面具有优势。此外，这一基本分析将有助于设计新的直流微电网的系统配置和参数。

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

2012 International Conference on Renewable Energy Research and Applications (ICRERA)

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