Damping interarea oscillations in power systems using finite time terminal sliding mode control of the unified power flow controller
by Sangram Keshari Routray; Rajesh Kumar Patnaik; P.K. Dash
International Journal of Power and Energy Conversion (IJPEC), Vol. 7, No. 3, 2016

Abstract: This paper presents a new nonlinear controller for unified power flow controller (UPFC) based on the Lyapunov's finite time terminal sliding mode concept. Further instead of controlling the direct and quadrature-axis currents of the series voltage source converter (VSC), the instantaneous real-and reactive power components are used as control variables. This mode of control dispenses the unmodelled dynamics of the VSC phase-locked loop system and produces a robust control for the active-reactive power, and dc voltage excursions. Computer simulation results are obtained for a variety of operating conditions for 3-machine 6-bus power system using the finite time terminal sliding mode control and the results are compared with a standard input-output feedback linearisation approach to validate the superiority of the proposed controller.

Online publication date: Mon, 29-Aug-2016

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