This study presents the analysis of control techniques of PID tuning parameters for load frequency control (LFC) of power system in order to maintain the frequency regulation. There are five tuning techniques is used to cognize the problem of load frequency control such as Ziegler-Nichols (ZN), Honeywell Tuning, Internal Model Control (IMC) based PID Controller Direct Synthesis (DS) and IMC based PID controller with first order filter. The primary attention of this paper is to collate these tuning techniques for single input and single output (SISO) system using MATLAB SIMULINK and using the model order reduction techniques with the help of ROUTH approximation, SKOGESTAD method and TAYLOR approximation method. third order system’s LFC abolished into second order model, second order plus dead time (SOPDT) model and first order plus dead time (FOPDT) model by using this three MOR techniques. This paper identified the comparative dissection of execution diagnosis of isolated response entire in the indication of time and frequency response specification. It is accomplished that Inter Model Control based PID Controller with first order filter demonstrate the better performance comparatively
