The problems of load frequency control (LFC) using optimal controllers are discussed in this paper. Two area power systems are implemented and analysed in each region as a result of abrupt load changes. The goal is to prevent errors caused by frequency and tie- line electric supply disruptions with the aim to assure cost effective power generation. P/ PI/ PID/ PIID compensating schemes have been developed and successfully tested. The gains of P/ PI/ PID/ PIID controllers are optimised using Grey Wolf algorithm on a two area power-network. The generating Stations used in this whole operation are Wind Thermal and Solar Thermal. The performances of said controllers are compared and an optimal one is chosen. When the findings of the suggested approach are compared to those of some recently published approaches, the benefits of the proposed approach become clear. The sensitivity analysis is carried out, demonstrating the proposed approach’s ability to cope with large changes in device parameters. This method is tested under a variety of load conditions.