Control Planning and Water Gate Design for Mini Hydro Power Plant in Kambangan

• Main Author: Ihsan Priambodo, Bagas
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/43466
• Institution: Institut Teknologi Bandung

The Government of Indonesia targeted the New and Renewable Energy in the total energy mix fraction to reach 23,1% by 2028. The plan was made as an effort to shift from the usage of non-renewable energy to new and renewable energy. One of the manifestations of the plan was the utilization of hydro power given the large potential that could be utilized. In a more specific scope, the Kambangan area had the potential for the construction of a mini hydro power plant because it had the Lojahan river with a flowrate of 7,14 m/s and an occurrence rate of 30%. The construction of a small hydro power plant must be equipped with a flow control system to maintain the life and function of the power plant. This final project aimed to design sluice gates for the intake, sandtrap, and forebay tank at the Kambangan small hydropower generation system. In addition to designing the door, the author also created a plan for door and safety valve control in the penstock to limit the flow of water to match the load, especially in cases of sudden load rejection. The sluice control performance was simulated using Microsoft Excel with several variations of load changes to see its effect on the flow of water while the effects of safety valve usage was simulated using Bentley Hammer V8i. After a rigorous calculation process, a sluice design with 1,8 m height and 1,5 m width was obtained. The control used has 10 opening modes for the intake door and 12 opening modes for the doors on the sand trap and forebay tank which could respond to load changes. Simulation results showed that the control was able to overcome the excess flow of water at a gradual or sudden decrease in load even though there is a slight excess of water in the forebay tank while the simulation using Bentley Hammer showed that the usage of safety valve could reduce the maximum pressure that may occur during load rejection.