Power oscillation damping using lead-lag controlled SVC.

Karo Naqshi; Mohyeddin Rahmani; Behrooz Vahidi; Seyed Hossein Hosseinian

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Power oscillation damping using lead-lag controlled SVC.

Author(s)

Karo Naqshi Deptartment of Electrical Engineering, University of Science and Technology, Tehran, Iran

Mohyeddin Rahmani Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran

Behrooz Vahidi Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran

Seyed Hossein Hosseinian Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran

Abstract

This paper proposes a new method to small signal stability improvement using controlled static VAR compensator (SVC). The linearized Phillips–Heffron model of a power system installed with a Static Var Compensator (SVC) is presented in order to increase the stability of the system parameters. Configuration of SVC in the power systems is widely adopted and effective to improve the power quality. In order to enhance the dynamic stability of power systems, this paper introduces the combination of static VAR compensator and lead-lag controller to compensate the reactive power. Feeding back the control signals, helps the controller to decrease the frequency oscillations of rotor, which are not negligible in the absence of lead-lag controller. The generator speed fluctuation (Δω) is the signal, which the combination of controller and SVC use to create the desired damping. As the result, creating the better damping for SVC, leads to better dynamic performance of system parameters, as well as reducing the steady-state errors. Also the settling times are reduced. The simulations are carried out for Single-Machine Infinite-Bus power system at two modes of operating.

Publication Details

Page(s) 451-456

DOI DOI not available

Published Journal: Science International, Volume: 25, Issue: 3, Year: 2013

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