The basic market conditions for the purchase of fossil fuels for power plants are presently considerably differing. The expected great changes in the electricity industry by the accepted deregulation have led to considerable effects on power plant operation. These changes of markets call for new faculties. One of the most important new faculties consists in the creation of a risk management combining sales prognoses and fuel requirements. It is the aim of risk management to uncover especially price and quantity risks and to initiate measures for risk reduction. The portfolio simulation is an instrument for the development of future risk management strategies.
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