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This paper presents a method for enhancing the frequency performance of micro hydro power plant by adding an additional device called capacitive energy storage (CES). A modification has been made by adding PID controller as additional controller of CES. Furthermore, to obtain the optimal parameter of CES, an optimization approach called imperialist competitive algorithm (ICA) is used as an optimization method. From the simulation results show that by adding CES-PID the frequency performance of the micro hydro power system is enhanced significantly. Moreover, the best performance is performed by a system with CES-PID optimized by ICA indicated by smallest overshoot. The analysis result obtained small overshoot response by using PID-CES controller that is equal to -1.371e-05pu, for system without controller equal to -0.000318 pu. By comparison, several scenarios for control methods are used.

Capacitive Energy Storage (CES) Optimization For Load Frequency Control in Micro Hydro Power Plant Using Imperialist Competitive Algorithm (ICA)