TRANSIENT SIMULATION OF A HYDROPOWER PLANT

Abstract

The operation of a Hydropower plant subject to several transient phenomenon due to load rejection, group start-up and shut-down, modification of operating point, earth fault, out of phase synchronization during start-up, emergency stop and so on. In order to ensure the safety of the power plant and to optimize operation parameters, a simulation. model of the power plant is required to investigate normal and all worst cases. The simulation of the dynamic behavior is usually performed separately for the hydraulic and electric part of the power plant allowing determining the set of parameters related to the security of each part. In this work, transient analysis of hydraulic systems like, penstock, valves and Pelton turbine, of hydropower plant (HPP) has been done by using Method Of Characteristics (MOC).The programming for transient analysis in penstock, valve, and turbine during load rejection has been done in C++. The graph for discharge from reservoir ,valve, pressure head at the valve and turbine speed with respect to time during load rejection have been obtained and conclusion have been drawn for better control and stability of hydraulic system in HPP.