Challenges of Hybrid DGs for Islanded Micro-grid Operation in West Region Energy System of Mongolia

In this paper, we deal with energetic aspects of electricity generation from the existing Hydro power and estimated large scale PV station in the Western Energy System of Mongolia, which is interconnected with Russian energy system and importing almost 70% of its electricity getting the amount of subsidies each year. The engineering concepts and calculations were made with the aims to investigate the technological and technical possibility for building up the capacity in this region to put the base stone of future study on detailed research activities on creating the challenges of islanded mode of the Western Energy System of Mongolia making suitable micro-grid with DGs. For achieving these goals the initial investigation was made in frame of the concepts, load profile trends and cases with hydro/PV hybrid plants concluding the benefits of such structure. The voltage-drop and power flow analyse was carried out in cases of:i) existing operation state of the Western Energy System with 5MW Durgun hydro, and ii) hybrid generation of 5 MW Durgun hydro + 3.4.5.7,5 and 10MW PV plants are connected to the System.