The document discusses the challenges of load frequency control (LFC) in multi-source power systems incorporating renewable energy, highlighting a two-area system with hydro, thermal, wind, and diesel power stations. It details the use of intelligent optimization techniques, specifically Gravitational Search Algorithm (GSA) and Firefly Algorithm (FA), to tune PID controller parameters with the aim of minimizing the Integral of Time-weighted Absolute Error (ITAE). The findings indicate that the FA outperformed GSA, with plans for future investigation into performance in deregulated power systems.