RIS ID

105508

Publication Details

H. Lomei, D. Sutanto, K. M. Muttaqi & M. Assili, "A new approach to reduce the non-linear characteristics of a stressed power system by using the normal form technique in the control design of the excitation system," in Industry Applications Society Annual Meeting, 2015 IEEE, 2015, pp. 1-6.

Abstract

In this paper, a new approach is presented to reduce the nonlinear characteristics of a stressed power system by reducing its second-order modal interaction through retuning some parameters of the generator excitation system. In order to determine the second-order modal interaction of the system, a new index on nonlinearity is developed using normal form theory. Using the proposed index of nonlinearity, a sensitivity function is formed to indicate the most effective excitation system parameters in the nonlinear behavior of the system. These dominant parameters are tuned to reduce the second-order modal interaction of the system and to reduce the index on nonlinearity. The efficiency of the proposed method is validated using a four-machine two-area test system. Simulation results show that a proper tuning of the excitation controller can reduce the second-order modal interaction of the system and can even improve the transient stability margin of the network.

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Link to publisher version (DOI)

http://dx.doi.org/10.1109/IAS.2015.7356856