Artículos de revistas
Evaluation Of Economic Impact Of External Equivalent Models Used In Reactive Opf Studies For Interconnected Systems
Registro en:
Iet Generation, Transmission And Distribution. , v. 1, n. 1, p. 140 - 145, 2007.
17518687
10.1049/iet-gtd:20050480
2-s2.0-84879726419
Autor
Tognete A.L.
Nepomuceno L.
dos Santos A.
Institución
Resumen
Reactive-optimisation procedures are responsible for the minimisation of online power losses in interconnected systems. These procedures are performed separately at each control centre and involve external network representations. If total losses can be minimised by the implementation of calculated local control actions, the entire system benefits economically, but such control actions generally result in a certain degree of inaccuracy, owing to errors in the modelling of the external system. Since these errors are inevitable, they must at least be maintained within tolerable limits by external-modelling approaches. Care must be taken to avoid unrealistic loss minimisation, as the local-control actions adopted can lead the system to points of operation which will be less economical for the interconnected system as a whole. The evaluation of the economic impact of the external modelling during reactive-optimisation procedures in interconnected systems, in terms of both the amount of lossesand constraint violations, becomes important in this context. In the paper, an analytical approach is proposed for such an evaluation. Case studies using data from the Brazilian South-Southeast system (810 buses) have been carried out to compare two different external-modelling approaches, both derived from the equivalentoptimal-power-flow (EOPF) model. Results obtained show that, depending on the external-model representation adopted, the loss representation can be flawed. Results also suggest some modelling features that should be adopted in the EOPF model to enhance the economy of the overall system. © The Institution of Engineering and Technology 2007. 1 1 140 145 Biskas, P.N., Bakirtzis, A.G., Macheras, N.I., Pasialis, N.K., A decentralized implementation of DC optimal power flow on a network of computers (2005) IEEE Trans. Power Syst., 20 (1), pp. 25-33 Tinney, W.F., Bright, J.M., Demaree, K.D., Hughes, B.A., Some deficiencies in optimal power flow (1988) IEEE Trans. Power Syst., 3 (2), pp. 676-683 Papalexopoulos, A., Hao, S., Liu, E., Alaywan, Z., Kato, K., Cost/benefits analysis of an optimal power flow: the PG&E experience (1994) IEEE Trans. Power Syst., 9 (2), pp. 796-804 Hao, S., Papalexopoulos, A., External network modeling for optimal power flow applications (1995) IEEE Trans. Power Syst., 10 (2), pp. 825-837 Nepomuceno, L., Santos, A., Equivalent optimization model for loss minimization: a suitable analysis approach (1997) IEEE Trans. Power Syst., 12 (4), pp. 1403-1412 Tognete, A.L., Nepomuceno, L., Santos, A., A framework for analysis and representation of external systems for online reactive-optimisation studies (2005) IEE Proc.-Gener. Transm. Distrib., 152 (6), pp. 755-762 Monticelli, A., Deckmann, S., Garcia, A.V., Stott, B., Real time external equivalents for static security analysis (1979) IEEE Trans. Power Appar. Syst., 98 (2), pp. 498-504 Deckmann, S., Pizzolante, A., Monticelli, A., Stott, B., Alsa-c, O., Studies on power system load flow equivalencing (1980) IEEE Trans. Power Appar. Syst., 99 (6), pp. 2301-2309 Geisler, K.I., Bose, A., State estimation based external network solution for online security analysis (1983) IEEE Trans. Power Appar. Syst., 102 (8), pp. 2447-2454 Geisler, K.I., Tripathi, N.K., State estimation based external network solution: field testing (1985) IEEE Trans. Power Appar. Syst., 104 (8), pp. 2126-2132 Bose, A., Modeling of external networks for online security analysis (1984) IEEE Trans. Power Appar. Syst., 103 (8), pp. 2117-2125 Bose, A., The effects of external modeling errors on online security analysis (1986) IEEE Trans. Power Syst., 1 (1), pp. 227-232 Kato, K., Snyder, W.L., Vemuri, S., Papalexopoulos, A.D., Oatts, M.L., Contaxis, G.C., Singh, J., Savulescu, S.C., External network modelling-recent practical experience (1994) IEEE Trans. Power Syst., 9 (1), pp. 216-228 Rahimi, A.F., Kato, K., Ansari, S.H., Bradwajn, V., Cauley, G., Sobajic, D.J., On external network model development (1996) IEEE Trans. Power Syst., 11 (2), pp. 905-910 Sun, D.I., Ashley, B., Brewer, B., Hughes, A., Tinney, W.F., Optimal power flow by Newton approach (1984) IEEE Trans. Power Appar. Syst., 103 (10), pp. 2864-2880 Lima, F.G.M., Soares, S., Santos, A., Almeida, K.C., Galiana, F.D., Numerical experiments with an optimal power flow algorithm based on parametric techniques (2001) IEEE Trans. Power Appar. Syst., 16 (3), pp. 374-379 Tognete, A.L., Equivalent OPFmodels based on the Newton method with barrier and parameterisation techniques'. PhD thesis DENSIS/FEEC/UNICAMP, Campinas-SP, Brazil, 2002 (in Portuguese)