Integrated tuning of modified PID load frequency controller for two area interconnected system including renewable energy sources

Load frequency controller is networked in noisy environment which is produced by frequent switching of load. Hence, this paper aims to develop a controller which is less sensitive to noise. Present paper introduces a modified PID load frequency controller for the two area interconnected system comprising of non-reheat turbine based thermal plant and wind power plant with and without frequency control. The proposed controller is established by cascading of derivative filter with PID controller. Ziegler-Nicholas tuning method is employed for tuning of PID controller. The novelty of this work is based on the fact that modified PID controller for DFIG based wind turbine with inertial control has not been reported in literature so far. Time domain analysis has been performed in MATLAB/SIMULINK ver. 2013a for testing of applicability of proposed controller. The simulation results of the modified PID controller have been compared with traditional PID controller. A substantial improvement in performance of the power system has been perceived in case of modified PID controller. Simulation results of the modified PID controller illustrate its feasibility for load frequency control.