Tuning of modified PID load frequency controller for interconnected system with wind power plant via IMC tuning method

Frequent switching of loads produced the noisy background for load frequency controller. Therefore, this paper purposes a less noise sensitive controller named modified proportional integral derivative (MPID) load frequency controller for the two area interconnected system counting thermal plant and wind power plant. The proposed controller is formulated by integrating low pass filter along with PID controller. The two area interconnected system is incorporated DFIG based wind power plant as participation of wind power is increasing day by day. Additionally, parameter of PID load frequency controller is tuned by internal model control (IMC) tuning method. Moreover, a comparative analysis is made between simulation results of IMC and Ziegler and Nichols (Z-N) tuning method. Simulation has been done in MATLAB/Simulink. The frequency and tie line power deviation reduces for proposed controller with both Z-N and IMC tuning methods. Hence, proposed controller has proved its applicability and appropriateness.