Real Time Simulation of Automatic Generation Control For Interconnected Power System

This paper presents real time simulation to analyze the behavior of discrete controller for interconnected power system. A two-area interconnected power system consisting of non-identical power plants with EHVAC transmission link as interconnection is considered for investigations. The hydro and nuclear power plant comprises of area-1 and area-2 respectively. In this paper new control strategies for digital controller is developed depending on the sampling time to test the controller in the non real time simulation environment and transform the controller into a real-time prototype controller, which is used for testing the algorithm in real working conditions. The real time simulation provides a quick solution for prototyping new functions in different types of industrial processes and devices controlled with a complex distributed control system. The real time simulation uses the discrete model of the AGC. Hence discrete controller for the AGC is derived from the continuous controller by discritization of the continuous controller using Tustin transformation, or trapezoid approximation method and the closed loop stability is checked by taking the bode of the closed loop of AGC model for different sampling time periods ,the dynamic response plot for 1% load disturbance in area-1. The discrete controller is prototyped and the real time simulation is performed to observe the results, the dynamic response plots are obtained for 1% load disturbance in area-1 of the real time model.