Rauf, RosnitaNazalul, ChairulAzman, Azmil2021-01-092021-01-092019-11978-60251349-1-3wahyu sari yenihttps://repository.unri.ac.id/handle/123456789/9895Pesisir Selatan Regency is an area that has a lot of primary energy potential, especially the potential of river water. Like in Lengayang sub-district, Kambang precisely on Lengayang trunk. When viewed from Google Earth, then 100% of the catchment area is protected TNKS. But the Pesisir Selatan district is the longest area of electricity distribution lines from Bungus to Silaut, so voltage drops often occur. Therefore, research is needed related to this problem. The purpose of this research in the TNKS region is the utilization of water energy for Microhydro and Minihydro Power Plants. For this reason, the method used is to survey water potential, to measure discharge and head, to make a lay out from the weir to the power plant. After calculating how much capacity is produced, the calculation, water potential and height of water fall in the village of Limau Gadang, Lengayang sub-district, Pesisir Selatan district produce power capacity of 160 kVA from 10 m Head with a discharge of 2 m3 / liter. For electricity distribution, a community of 200 kVA with ± 155 houses can be given 900 VA each. With a total of 155 houses, the total installed power is 139,500 VA meaning that there is still remaining power of 60,500 VA. It is expected that with the realization of this micro-hydro development, the electrical system in the South Coastal Regency, the better and finalizes the occurrence of voltage drop and the reliability of the electrical system is maintained.enPLTMHTNKSWater Discharge PENDAHULUANArticle