Comparative analysis of different Controllers on two area interconnected power system model using Gravitational Search Algorithm

This paper presents the effect of different controllers on Load Frequency Control (LFC) of a two area interconnected thermal power system for the advancement of dynamic performance. Time domain simulations are performed to investigate the performance of the system in the presence of generation rate constraint (GRC). The Controller consists of I, PI and PID compensator where the gain setting of proportional (P), integral (I) and derivative (D) constants are optimizes using Gravitational Search Algorithm (GSA) and the objective function used for minimization is Integral of Time multiplied with Absolute value of Error (ITAE). Results reveal that for a step load disturbance, PID controller gives the better dynamic performance of LFC on I and PI compensator and keep the frequency and tie-line power within the range; hence, it proves the effectiveness of GSA based PID compensator in two area interconnected thermal system.