A novel hybrid gravitational search and pattern search algorithm for load frequency control of nonlinear power system

- Selection of objective function and controller structure is vital for controller design.
- An objective function using ITAE, damping ratio and settling times is proposed.
- The concept is applied to design an hGSA-PS-based PI/PID controller for LFC.
- Nonlinear interconnected power system model with GRC, GDB and time delay is considered.