Conference Paper

Reactive power management and voltage control of large Transmission System using SVC (Static VAR Compensator)

Comput. Sci. & Eng. Dept., North Carolina A & T State Univ., Greensboro, NC, USA
DOI: 10.1109/SECON.2011.5752911 Conference: Southeastcon, 2011 Proceedings of IEEE, At Nashville, TN, Volume: Southeastcon, 2011 Proceedings of IEEE
Source: IEEE Xplore


The role of the transmission network in the Power System is to transmit the power generated in the power plants to the load centers and the interconnected power systems. The transmission of electric power has to take place in the most efficient way in addition to providing flexibility in the process. Flexible A.C. Transmission System (FACTS) promotes the use of static controllers to enhance the controllability and increase the power transfer capability. Providing reactive shunt compensation with shunt-connected capacitors and reactors is a well established technique to get a better voltage profile in a power system. Shunt capacitors are inexpensive but lack dynamic capabilities, thus some form of dynamically controlled reactive power compensation becomes essential. This feature is provided by Static VAR Compensator (SVC). The work presented here also compares SVC with fixed capacitor compensation and documents the superiority of SVC using Computer Simulation and its performance for reactive power management and better voltage control.

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    • "II. STATIC VAR COMPENSATOR (SVC) BACKGROUND Static Var Compensators(SVC) are shunt connected static generators / absorbers whose outputs are varied so as to control reactive power flowing in order to control power factor or voltage level of the electric power systems [7]. SVC has an important role in power system transmission and distribution performance. "

    Full-text · Conference Paper · Jul 2015
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    ABSTRACT: Electrical loads both generate and absorb reactive power. Since the transmitted load varies considerably from one hour to another, the reactive power balance in a grid varies as well. The result can be unacceptable voltage amplitude variations, a voltage depression, or even a voltage collapse. A rapidly operating Static Var Compensator (SVC) can continuously provide the reactive power required to control dynamic voltage swings under various system conditions and thereby improve the power system transmission and distribution performance. Installing an SVC at one or more suitable points in the network will increase transfer capability through enhanced voltage stability, while maintaining a smooth voltage profile under different network conditions. In addition, an SVC can mitigate active power oscillations through voltage amplitude modulation. Therefore, in this paper the application of SVC for voltage support at a multimachine electric power system is carried out. The proposed SVC is installed on the middle of the network and its parameters are adjusted by using Particle Swarm Optimization (PSO). The viability of SVC in voltage support is shown by nonlinear simulation results.
    No preview · Article · Jan 2011 · World Applied Sciences Journal
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    ABSTRACT: Static Var Compensator (SVC) in one of the most widely used FACTS devices in industry and real world power systems. The problem of finding optimal values of SVC parameters has been studied for years. Many different methods have been carried out to design SVC controllers. But trying to find better controller is still remains. In this scope, Harmony Search (HS) Algorithms method as a meta-heuristic optimization method is considered for tuning the parameters of SVC. A multi machine electric power system is used to test viability of SVC in voltage support under disturbances. Simulation results on a multi machine power system show the ability of SVC in control of voltage as well as stability enhancement. The results are carried out by numerical simulations by using MATLAB software.
    No preview · Article · Jan 2011 · Indian Journal of Science and Technology
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