Currently, diesel generators that are still operating must be hybridized with renewable energy in order to save fuel expenditure. In addition, the generator scheduling system is also a solution to save fuel. This study aims to schedule the operation of a hybrid power plant diesel/photovoltaic/microhydro in the village of Rumah Sumbul in serving the load needs in order to obtain the best and economical system combination that is able to serve the needs of a continuous electrical load. Based on the results of the analysis using HOMER, the scheduling in the first scenario of diesel/microhydro is able to produce electrical energy of 35.6 MW/year. For the second scenario, the diesel/photovoltaic operation is capable of producing 12.20 MW of electrical energy/year. The two hybrid power plants have met the target for electricity production of 2 MW/year. Furthermore, the economical side of the diesel/microhydro combination is cheaper with operating costs of 467,545,800 IDR for 25 years with a profit of 601,150,000 IDR during the project, where the return on capital occurs in the 13 th year. operational costs of IDR 2,885,597,000 for 25 years with a profit of 607,009,000 IDR during the project in progress and a return on investment in the 13th year.

North Sumatera which has areas of extreme enough 0-350 altitude above sea stretching from the coast of the Strait of Malaka to the Bukit Barisan mountains, resulting in some very isolated areas and may not be covered by the electricity supply ongride. It is very necessary to conduct basic research on the application of hybrid power generation technologies to meet the lighting facilities in remote villages. After surveying potential at three points, namely: the lowlands, plains and plateaus. From the data analysis shows that, forLowland rainfall amounts average of 166 mm/month, solar irradiance an average of 185.78 Wh/m2/day and an average wind speed of 2.68 knots. Furthermore, to the plains of moderate rainfall average of 176 mm/month, the intensity of solar irradiance 176 Wh/m2/day and wind speeds average 2,32 Knot, while the highlands rainfall average ranges from 171 mm/month, the intensity of solar irradiance 181.09 Wh/m2/day as well as wind speed 2.5 knots. This shows North Sumatera province is potential to develop a hybrid power generation technologies (microhydro, solar, wind and battery) to support the accelerated development of the villages.