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.

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