%0 Journal Article
%T A combined pool/bilateral dispatch model for electricity markets with security constraints
%A L¨®pez-Lezama
%A Jes¨²s Mar¨ªa
%A Granada-Echeverri
%A Mauricio
%A Gallego-Pareja
%A Luis A
%J Ingenier¨ªa y Ciencia
%D 2011
%I Universidad EAFIT
%X the secure operation of the electric power system is a challenging task for the system operator which is responsible of its coordination, control and monitoring. in most power systems security is typically handled on a multi-state approach. in which case, security criteria are incorporated by means of additional constraints, modifying the initial dispatch calculation. in this paper a generation dispatch model for competitive energy markets considering security constraints is presented. the proposed approach combines the generation dispatch related to pool and bilateral markets with coupled post-contingency optimal power £¿ows into a single optimal dispatch model, avoiding economic inefficiencies that appear in conventional multi-stage dispatch approaches. the proposed model is linear, and as such, it is based on a dc model of the network. a 6-bus didactic system and the ieee rts-24 bus test system are used in order to show the operation and effectiveness of the proposed approach and to compare it with the basic pool/bilateral dispatch with no security constraints. results show that the inclusion of security constraints lead to a higher dispatch cost. furthermore, it was found that the enforcement of firmed bilateral contracts might lead to system congestion.
%K optimal dispatch
%K bilateral contracts
%K energy markets.
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S1794-91652011000100001&lng=en&nrm=iso&tlng=en