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Discrete generation decisions simulation including market dynamic interactions

Weiguo Yang W., Sheble G.B.

Systems Science

2002

Vol. 28, nr 2

73-83

Electric market dynamics is important for market administrators to maintain market reliability, forecast problems and take remedy actions. Equilibrium analysis models were built in the past to find market equilibrium. However, to achieve the goal of deregulation, not only should market equilibrium be identified, but also achievability of equilibrium and market transition process to equilibrium should be known. One cannot get these properties without studying interactions between market participants, which were not included in equilibrium analysis. Interactions between generation companies (GENCOs) are major source of market dynamics. They are particularly important for electric market and GENCOs decision making because there are few participants in electric market and current electric markets are oligopolistic. This paper models GENCOs decision making and interactions between different GENCOs from a control point of view. GENCO decisions that are evolving with time are modeled as control processes and electric markets are modeled as control systems. Corresponding market dynamics and properties are studied. An oligopolistic market is used to illustrate the ideas and numerical examples are provided for all cases. Results showed new models can provide conclusions that are difficult or impossible to get by pure equilibrium analysis.