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Nonlinear modal interaction in HVDC/AC power systems with DC power modulation

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4 Author(s)
Ni, Y.X. ; Tsinghua Univ., Beijing, China ; Vittal, V. ; Kliemann, W. ; Fouad, A.A.

In this paper investigation of nonlinear modal interaction using the normal form of vector fields technique is extended to HVDC/AC power systems with DC power modulation. The AC-DC interface equations are solved to form a state space model with second order approximation. Using the normal form technique, the system's nonlinear dynamic characteristics are obtained. The proposed approach is applied to a 4-generator HVDC/AC test power system, and compared with the time domain solution

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