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ABSTRACT: The subsynchronous resonance (SSR) phenomenon may occur when a steam turbine-generator is connected to a long transmission line with series compensation. The main purpose of this work is to verify the capability of the gate-controlled series capacitor (GCSC) to mitigate SSR. For this study the GCSC was tested in conjunction with the IEEE First Benchmark Model. The actual possibility of controlling SSR was verified by digital simulation using the alternative transients program/electromagnetic transients program. As a result it was shown that GCSC can damp SSR even without a specific control. It was also shown that, using a simple controller, SSR as well as electromechanical oscillation can be damped.
IEEE Transactions on Power Delivery 08/2007; · 1.35 Impact Factor
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ABSTRACT: This paper presents the design of an optimal dynamic neurocontroller for a new type of FACTS device - the gate controlled series capacitor (GCSC) incorporated in a multi-machine power system. The optimal neurocontroller is developed based on the heuristic dynamic programming (HDP) approach. In addition, a dynamic identifier/model and controller structure using the recurrent neural network trained with backpropagation through time (BPTT) is employed. Simulation results are presented to show the effectiveness of the dynamic neurocontroller and its performance is compared with that of the conventional PI controller under small and large disturbances
Intelligent Systems Application to Power Systems, 2005. Proceedings of the 13th International Conference on; 12/2005
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ABSTRACT: Controllable series compensation is a useful technique to increase the efficiency of operation of existing transmission lines and improve overall power system stability. Up to date, the TCSC is the most adopted solution whenever controllable series compensation is required. This paper introduces the gate controlled series capacitor (GCSC), a novel FACTS device for series compensation. The principle of operation and some prospective applications of the equipment are presented. Special attention is given to the duality of the GCSC with the well-known thyristor controlled reactor, used for shunt compensation. It is shown that the GCSC can be more attractive than the TCSC in most situations. Simulation results illustrate the time response of the equipment and its ability to control power flow in a transmission line. Finally, technology issues regarding high power self commutating valves are discussed.
Transmission and Distribution Conference and Exposition: Latin America, 2004 IEEE/PES; 12/2004
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ABSTRACT: The subsynchronous resonance (SSR) phenomenon may occur when a steam turbine-generator is connected to a long transmission line with series compensation. The main purpose of this works is to verify the capability of the gate controlled series capacitor (GCSC) to mitigate SSR. For this study the GCSC was tested in conjunction with the first IEEE benchmark system. The actual possibility of controlling SSR was verified by digital simulation using the ATP/EMTP (alternative transients program/electromagnetic transients program). As a result it was shown that GCSC is a powerful device for controlled series compensation both for power flow control and SSR damping. It was shown also that in some case the GCSC can damp SSR even without a specific control. GCSC can also damp electromechanical power oscillations as shown in some simulations
Power Engineering Society General Meeting, 2006. IEEE;
