ASEAN Journal of System Engineering, Vol. 4, No. 2, December 2020:44-50 44 Online version available at http://journal.ugm.ac.id/index.php/ajse FEASIBILITY STUDY OF MICRO HYDRO POWER PLANT CAPACITY IN BLUMBANG BANJARARUM KALIBAWANG KULONPROGO Lintang Timur 1 , Fifin Hindarti 2,* , Rosiana Indrawati 3 1,2,3 Department of Energy Engineering, Faculty of Industrial Technology, Institut Teknologi Yogyakarta *Correspondence: viendarti@ity.ac.id 1. Introduction The consumption of electrical energy increases every year along with the increase in population and economic growth of the people in an area (Fadillah et al., 2015). In 2017 - 2018 there was an increase in electricity production by 3%. In 2018, the most dominant energy for electricity was fossil energy, such as 50% coal, 29% natural gas, and 14% newest energy (Suharyati et al., 2019). Indonesia has the potential of a water source that is so large and can be the electrical energy source (Durrani et al., 2019). Micro hydro power plant is one of the electrical energy sources of water power that cannot spoil the environment (Zeb et al., 2019)(Budiyanto, 2015). The water- energy source that can be used for micro hydro power plant is 19,385 Mw and spreads in Indonesia entirely (Fajarsari et al., 2015). The excess of this power can adapt to the peak load or the net disturbance by a fast response (Puskom ESDM, 2018) The village of Blumbang, Banjararum sub-district, Kalibawang district, and Kulon Progo regency has not been optimal for electrical current. Blumbang village is in the hill area and full of nature thickly. When the rain is falling, and the hurricane is coming, there often happens to extinguish electricity from PLN, the State Electricity Company. That is why electricity has not been optimal in Blumbang village. The village that is located in the mountain range and far away from the center of the city makes that village stay sturdy. The Blumbang micro hydro power plant is one of the use of hydropower located in Dusun Blumbang Banjararum Kalibawang Yogyakarta. In 2014, Blumbang village was assisted by Gadjah Mada University (UGM), and the Ministry of Energy and Mineral Resources (ESDM) established micro hydro power plant. At the beginning of the year, it only found one machine and pipeline. When time is running fast, one device is not enough and not optimal. So, in 2015 there is an addition of one machine, so the electricity total is about 30 kW. The condition of Blumbang micro hydro power plant can be seen in Figure 1. Figure 1. The condition of PLTMH Blumbang Yogyakarta has an electrical energy supply that is so large, especially in the newest energy sector (Sudiro et al., 2019). The sources can be increased, such as the sun's energy, wind speed energy, and micro hydro. The sun has the potential for 4,8 kWh/m2/day. The wind speed energy is 4 to 5m/second. And hydro micro is 1.188,6 kW (Alhasibi, 2010). The condition of an area that has the society and various customs in doing life will influence a load of an area. The electricity company has to fulfill the society's needs about service of quantity, time, and place with the need portion each other. The society has the right to get an electric current that is compatible and standard (Tampubolon et al., 2014). According to (Prasetijo et al., 2012) the output of power that is resulted from the generator can use the similarity: P= √3.V.I.cos φ (1) P = Power / Capacity (Watt) V = Voltage / Strain (Volt) I = Intensity / Current (Ampere) Cos φ = 0,8 (Value) History: Received: September 7, 2020 Accepted: November 2, 2020 First published online: December 25, 2020 Keywords: PLTMH Supply Demand Economic Comparison Abstract The Blumbang micro hydro power plant is a power plant utilizing hydropower that supplies electricity to the Blumbang area. The resulting supply is very large, around 30 kWh. However, it cannot be fully used by the surrounding society. So, it is necessary to do a feasibility study to increase the power capacity to determine supply and demand. This research aims to determine the community's supply and demand, which will impact the potential that can be taken by society. The method used is field observations, supply and demand observations, analysis of differences in supply and demand. The results that the feasibility of increasing the power capacity. It supplies generated from PLTMH Blumbang ranges from 24-26 kWh of the electricity demand of micro hydro power plant, 6 kWh demand electricity of micro hydro power plant and PLN 16 kWh. The Blumbang society's electricity bill has decreased with the Blumbang micro hydro power plant.