Extensive analysis of fault response and extracting fault features for DC microgrids

Alexandria Engineering Journal

M.M. Eissa¹  Hossam A. Abd el-Ghany²  Diaa-Eldin A. Mansour²  Eatmad W. Nahas² 

[1] Corresponding author.;Department of Electrical Power and Machine Engineering, Faculty of Engineering, Tanta University, Tanta 31511, Egypt;

关键词: Renewable energy sources;    DC microgrids;    Fault response;    Fault features;   

DOI  :  

来源: DOAJ

【 摘 要 】

This paper presents an extensive fault analysis for DC microgrids based on accurate representation of DC microgrid components. The DC microgrid incorporates photovoltaic system and wind energy system as renewable energy sources, batteries as energy storage devices, and constant power loads as a typical loading profile in DC systems. As a practical issue, all renewable energy sources are controlled for maximum power point tracking (MPPT). Also, various interfacing topologies for AC sources are investigated. Since grounding issue is crucial in fault behavior, the studied microgrid considered possible grounding schemes. During the fault analysis, the behavior of each individual source is obtained when a fault occurred on its DC terminals. The study showed very valuable results and recommendations that should be considered in the protection schemes. The fault current magnitude and time constant are varied significantly for different sources and different interface topologies. Then, the fault response of all sources when connected to the DC microgrid is obtained and evaluated in comparison to the response of individual sources. Finally, the main features of fault response in DC microgrids are summarized and the main challenges for protection schemes are highlighted to be a framework for future studies in this issue.

【 授权许可】

Unknown