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Decentralized nonlinear optimal excitation control

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4 Author(s)
Lu, Q. ; Dept. of Electr. Eng., Tsinghua Univ., Beijing, China ; Sun, Y. ; Xu, Z. ; Mochizuki, T.

A design method to lay emphasis on a differential geometric approach for decentralized nonlinear optimal excitation control of multimachine power systems is suggested in this paper. The control law achieved is implemented via purely local measurements. Moreover, it is independent of the parameters of power networks. Simulations are performed on a six-machine power system. It has been demonstrated that the nonlinear optimal excitation control could adapt to the conditions under large disturbances. Besides, this paper has verified that the optimal control in the sense of LQR principle for the linearized system is equivalent to an optimal control in the sense of a quasi-quadratic performance index for the primitive nonlinear control system

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Power Systems, IEEE Transactions on  (Volume:11 ,  Issue: 4 )