Hydro reservoir handling in Norway before and after deregulation

摘要: Abstract The Norwegian Energy Act that came into force in 1991 deregulated the electricity market and removed former obligation power companies had to supply geographical area they were responsible for. Hence producers can on basis of profitability. In 2007 was evaluated by Government. As a part this, study concerning hydro reservoir handling before after deregulation carried out SINTEF. Public statistics show average levels measured per cent capacity have been reduced 1990. We used power-market model EMPS 1 (EFI's Multi-area Power-market Simulator) analyze if this reduction be explained natural variation climatic variables or structural changes occurred Simulation results cannot variables. Structural such as increased transmission capacities can, however, explain some reduction. Our does not indicate present gives are too low. paper we also describe stochastic dynamic optimization problem for long-term hydropower scheduling, how actually is solved model.