Abstract
Being the largest power producer in Denmark, Elsam faces a complex operational optimisation problem at portfolio level as well as at the individual power plant level. The utilisation of advanced modelling and control systems at all levels of the power production system and the integration between these levels play an essential role in optimising performance on a commercialised market. The applied optimisation concept is introduced as a distributed multi-level control problem, and the primary functionalities at top levels are presented, including short-term load planning, balancing power control, frequency control, marginal costs calculator and multi-variable master control. Practical examples illustrate the interaction between the functionalities and emphasise the importance of using advanced modelbased control methods.
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