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Power System’s Voltage Stability Improvement Using Static Var Compensator

Matthew, Simeon and Wara, S.T. and Adejumobi, I. A. and Ajisegiri, E. S. A. and Olanipekun, A. J. (2014) Power System’s Voltage Stability Improvement Using Static Var Compensator. International Journal of Emerging Technology and Advanced Engineering, 4 (1). pp. 494-501. ISSN 2250-2459

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In alternating current systems, voltage fluctuation is a common phenomenon. Most of the voltage fluctuation problems result from the changes in the system’s reactive power resulting from excessive supply or consumption of reactive power by the elements of the system and the variation in the consumers’ loads. In this paper, the effect of Static Var Compensator (SVC) in stabilizing power system’s voltage through effective reactive power compensation was investigated. Power flow equations involving voltage drop with/without SVC were developed. SVC modeling equations were also developed and used to determine its parameters. Based on the SVC parameters, SIMULINK blocks were used to implement the phase controlled Thyristor–Controlled-Reactor Fixed-Capacitor (TCR-FC) SVC. The Nigerian 28-bus power system used for the study was also modeled using SIMULINK/MATLAB. The 28-bus system was first simulated without SVC and then with two SVCs located at different buses to obtain the bus voltages in both cases. From the bus voltages the total voltage drops for the system with and without SVC were estimated and compared. The compared results clearly showed that, the system’s voltage drop was reduced by 33.78% indicating a significant improvement in the system’s voltage stability when SVCs were applied.

Item Type: Article
Uncontrolled Keywords: Reactive Power, SIMULINK, Static Var Compensator, Voltage Drop, Voltage Stability
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 22 Apr 2015 09:01
Last Modified: 22 Apr 2015 09:01

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