Nonlinear Adaptive Excitation Control for Structure Preserving Power Systems

The paper proposes a decentralized excitation controller to improve the stability of large power systems. Extended Lyapunov-like energy function and equivalent expressions of stator transient voltages are utilized to design a nonlinear adaptive excitation controller. The proposed controller only requires local machine measures and parameters. The performance of the designed excitation control system is evaluated on the well known IEEE 118-bus 54-unit power system and compared with conventional exciter controls.