一种用于直流微电网的高效光伏发电系统

H. Elfeqy, M. Shahin, A. Al-Rumaihi, A. Massoud, A. Gastli
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引用次数: 10

摘要

气候变化引起了人们的广泛关注,人们开始转向光伏等环保能源。考虑到今天的建筑物中使用了大量的直流负载,现有的基础设施是交流电源系统,而光伏是直流电源,因此在DC-AC-DC转换中将存在功率损耗。因此,使用直流微电网的概念可以直接从直流绿色电源为本地直流负载提供更有效的电力,并且转换最少。本文试图为直流微电网设计一种高效的电力系统。卡塔尔大学的一栋建筑被选为直流微电网系统集成的案例研究。本文还讨论了利用Matlab/Simulink对PV建模和最大功率点跟踪器进行仿真。此外,通过实现两种DC-DC转换器:光伏系统的交错升压转换器和储能系统的双向降压转换器,进行了可行性研究,以调查系统设计的可行性。结果非常令人满意。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A highly efficient PV power system for DC MicroGrids
Climate change attracted widespread attention to shift towards environmentally friendly energy sources such as photovoltaics. Considering the facts that there are large numbers of DC loads that are used in today's buildings, the existing infrastructure is an AC power system, and the PV is a DC source, there will be power losses in the DC-AC-DC conversions. Therefore, the concept of using a DC MicroGrid can provide more efficient power to native DC loads directly from the DC green sources, with minimum conversions. This paper attempts to design a highly efficient power system for a DC MicroGrid. One building at Qatar University is selected and considered as a case study for the DC MicroGrid system integration. This paper discusses also the simulation of PV modeling and the maximum power point tracker using Matlab/Simulink. In addition, a feasibility study is carried out to investigate the viability of the system design through the implementation of two DC-DC converters: interleaved boost converter for the PV system and bidirectional buck converter for the energy storage system. The results are very satisfactory.
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