Adaptive H_∞ excitation control of multimachine power systems via the Hamiltonian function method

Abstract

Using the Hamiltonian function method, this paper investigates the adaptive H _∞ excitation control of multimachine power systems with disturbances and parameter perturbations. A key step in applying the Hamiltonian function method to the multimachine system is to express the system as a dissipative Hamiltonian system, i.e. to complete dissipative Hamiltonian realization (DHR). By using pre-feedback technique, this paper expresses the multimachine power system as a dissipative Hamiltonian system. Then, the stability analysis of the achieved dissipative Hamiltonian system is proceeded. Finally, based on the achieved DHR form, the adaptive H _∞ excitation control of the multimachine power system is investigated and a decentralized simple excitation control strategy is obtained. Simulations on a six-machine system show that the adaptive H _∞ excitation control strategy proposed in the paper is more effective than some other control schemes.

Acknowledgements

Supported by Project 973 of China (G1998020307, G1998020308) and the Chinese Postdoctoral Foundation and the National Natural Science Foundation.