The Influence Of The Mode Of Operation Of The Static Synchronous Series Compensator (sssc) In The Establishment Of The Angle Of Electric Power Systems [a Influência Do Modo De Operação Do Sssc Na Estabilidade De ângulo De Sistemas Elétricos De Potência]

In order to accomplish specific compensation objectives, a Static Synchronous Series Compensator (SSSC) can be controlled according different methods. In the literature, the most discussed control modes of the SSSC are 1) constant voltage mode, 2) constant impedance emulation mode, and 3) constant power control mode. The first two modes above cited are used when purely series reactive compensation is required, whereas the third one also enables to control the power flow in the transmission network. Since these modes can have different impacts on system angle stability, this paper aims to assess the influence of SSSC operation mode on both small-signal and transient stability of power systems. The study is based on modal analysis and time domain simulations which are carried out by using the Power System Analysis Toolbox (PSAT). The results obtained allow to conclude that, when performing purely series reactive compensation, the SSSC usage in the constant impedance emulation mode is the most beneficial strategy to improve both smallsignal and transient stability.183347360Del Rosso, A.D., Cañizares, C.A., Doña, V.M., A study of TCSC controller design for power system stability improvement (2003) IEEE Transactions on Power Systems, 18 (4), pp. 1487-1496Duangkamol, K., Mitani, Y., Tsuji, K., Hojo, M., Fault current limiting and power system stabilization by static synchronous series compensator, IEEE Power System Technology (2000) Proceedings. PowerCon, 3 (8), pp. 1581-1586Elices, A., Rouco, L., Bourles, H., Margotin, T., Physical interpretation of state feedback controllers to damp power system oscillations (2004) IEEE Transactions on Power Systems, 19 (1), pp. 436-443Gama, C., Brazilian north-south interconnection - control application and operating experience with a TCSC (1999) IEEE PES Summer Meeting, 2, pp. 1103-1108Hingorani, N.G., Gyugyi, L., (2000) Concepts and Technology of Flexible AC Transmission Systems, , IEEE Press, Wiley & SonsKumkratug, P., Haque, M.H., Improvement of stability region and damping of a power system by using (2003) SSSC, IEEE PESKundur, P., (1994) Power System Control and Stability, , Editora Mc Graw-HillMartins, N., Lima, L., Eigenvalue and frequency domain fo small-signal electromechanical stability problems (1990) IEEE Symposium on Application of Eigenanalysis and Frequency Domain Methods for System Dynamic Performance Special Publication 90TH0292-3 PWR: 17-33Martins, N., Pinto, H.J.C.P., Paserba, J.J., TCSC controls for line scheduling and system oscillation dam ping - results for a small example system (1999) Proceedings of 13th Power System Computation Conference (PSCC), pp. 1244-1251. , Trondheim, Norway ppMehraban, A., Edris, A., Schauder, C., Provanzana, J.H., Installation, commissioning, and operation of the world's firt UPFC on the AEP system (1998) Proceedings of International Conference on Power System Technology (POWERCON), 1, pp. 323-327Milano, F., An open source power system analysis toolbox (2005) IEEE Transactions on Power Systems, 20 (3), pp. 1199-1206http://www.power.uwaterloo.ca/-fmilano/downloads.htm, Milano, F, 2006, Power System Analysis Toolbox, Documentation for PSAT version 2.0.0 beta;Song, Y.H., Johns, A.T., (1999) Flexible AC Transmission System (FACTS), , The Institute of Electrical EngineersWatanabe, E.H., Barbosa, P.G., Almeida, K.C., Taranto, G.N., Tecnologia FACTS - tutorial (1998) SBA Controle & Automação, 9 (1), pp. 39-55Zhang, X.-P., Advanced modeling of the multicontrol functional static synchronous series compensator (SSSC) in newton power flow (2003) IEEE Transactions on Power Systems, 18 (4), pp. 1410-141