Performance Evaluation of Open Loop and Closed Loop Generation Rate Constraints in the Optimal Load Frequency Control of a Two-Area Thermal Power System

¹ EEE Department, Vasireddy Venkatadri Institute of Technology, Guntur, India 522508.
² Department of Electrical Engineering, Graphic Era (Deemed to be University), Dehradun - 248002, India
³ Graphic Era Hill University, Dehradun, 248002, India
⁴ Department of Electrical Engineering, School of Physics and Electronic Engineering, Hanjiang Normal University, Hubei Shiyan 442000, P. R. China

^* Corresponding author: thebestbajaj@gmail.com

Abstract

This paper focuses on the optimal scheduling of the load frequency control (LFC) of a two-area thermal power system (TATPS) under load perturbations. For obtaining optimal LFC performance, presenting the three-degree-of-freedom proportional-integral-derivative controller (3DOFPID) as regulator. However, for the effective functioning of the 3DOFPID regulator, the water cycle algorithm (WCA) is enforced for the location of the suitable parametric values. Moreover, the TATPS is operated with the GRC structures of the open loop and closed loop individually to demonstrate the most effective model for optimal operation. Simulation results showcased that the closed-loop GRC structure dominates open-loop modeling in obtaining the optimal LFC. Further, the closed-loop GRC model for the robust performance of thermal units is validated by testing its performance under varying loads and jtluncertainty in the tie-line parameter.