The Models of Strategic Interaction between Network and Generating Companies at Electricity Transmission Market

The paper considers the strategic interaction between network and generating companies at electricity transmission market within the simplest electric power system with two nodes. The four possible variants of the market organization are investigated: guaranteed regulated and non-regulated network monopoly, network monopoly facing potential competition from the independent network company or generating company. The possible consequences and by-effects of vertical unbundling, in particular, influence of such a regulation on the prices and network transfer capabilities, are analyzed. It is shown that the elimination of monopolistic preferences on electric power transmission with the possibility of network objects building and operation by the generating companies is an effective mechanism for electricity price reduction.oligopoly, monopoly, strategic interaction, potential competition, Nash equilibrium, electricity transmission market

Conservative arbitrary order finite difference schemes for shallow-water flows

AbstractThe classical nonlinear shallow-water model (SWM) of an ideal fluid is considered. For the model, a new method for the construction of mass and total energy conserving finite difference schemes is suggested. In fact, it produces an infinite family of finite difference schemes, which are either linear or nonlinear depending on the choice of certain parameters. The developed schemes can be applied in a variety of domains on the plane and on the sphere. The method essentially involves splitting of the model operator by geometric coordinates and by physical processes, which provides substantial benefits in the computational cost of solution. Besides, in case of the whole sphere it allows applying the same algorithms as in a doubly periodic domain on the plane and constructing finite difference schemes of arbitrary approximation order in space. Results of numerical experiments illustrate the skillfulness of the schemes in describing the shallow-water dynamics