This chapter puts forward a dynamic game theoretic model of oligopolistic competition in spatially distributed electric power markets having a 24 - hour planning horizon. The purpose of this model is to allow quick testing of the effects of changes to the underlying electric power network. Therefore, the game is formulated as a nonlinear complementarity problem that can be solved effi ciently using sequential linearization and a Lemke's type algorithm for each resulting linear complementarity problem. The underlying electric power network is represented by the widely accepted linearized DC approximation, allowing the substitution of power transmission distribution factors for Kirchhoff's energy balance and voltage laws. The model is tested on a 15 - node representation of the northwest European electricity market formed by Belgium, France, Germany and the Netherlands. The effects of various infrastructure disruptions, in the form of network capacity changes, are simulated.
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