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Fast Transient Stability Control of Power System in Deregulated Environment

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2 Author(s)
Chen, H.C. ; Inst. of Inf. & Electr. Energy, Nat. Chin-Yi Inst. of Technol., Taichung ; Li, P.C.

The partial energy function is applied to assess the transient stability for a power system subjected to a large disturbance. Following this assessment, an energy-based analytical sensitivity method for fast transient control to prevent loss of synchronism of generators is presented. The sensitivity of the partial energy margin at any instant to the change of generation level has been analytically derived in a closed form. The proposed sensitivity technique offers a systematic calculation for quantitative estimation of generation that must be adjusted to maintain system stability. Furthermore, this paper proposes two local control strategies using the energy-based sensitivity method with the superconducting magnetic energy storage (SMES) unit as an adaptive transient controller to enhance the power system transient performance. The accuracy test of the partial energy function and the effectiveness of both control schemes are illustrated with the Taipower system. The results are found to be encouraging

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Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES

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