Integration of 50 % wind power in a CHP-based ... - Ea Energianalyse

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Integration of 50 % wind power in a CHP-based ... - Ea Energianalyse

30 Characteristics of the Danish energy systemCapacity extensions on interconnectionsThe strengthening of the flow between price systems through building new connectionsis a well known tool for system operators. In recent years, deciding whether the establishmentof a new connection should take place or not have been determined on the basisof bottleneck revenues. Due to increased bottleneck income in the Nordel area the lateryears, Nordel predicts a feasible positive economy for a range of potential connections(see Figure 3.14). The decision to fallow these through has not taken place though.Figure 3.14, Reinforcement of external Nordic interconnections in general shows a positive costbenefit.Potential reinforcements are not prioritized. The proposed re-enforcements are said to benot necessarily mutually exclusive (Nordel 2008)Establishing new interconnections is very cost heavy with investments in the order ofbillions of Euros sometimes. At the same time, despite of the system load issues mentionedearlier in Chapter 1, it is an important tool for balancing markets – especiallywith the increasing wind capacities being installed in North-Europe.Energy storage technologiesWith the increasing awareness of the impacts of large wind penetration on the marketsystems, various technologies for storing energy have been in focus. Regarding the heat,storage is already possible (and widely used) in the form of accumulations tanks, creatinga peak-load buffer or perhaps withholding heat for hours with more favorable heat orelectricity prices. When it comes to the electricity however, technically and economicallyfeasible methods for withholding electricity for sale in hours with better prices are stilllacking. So far, the biggest ‘battery’ the system has at its disposal is still the Nordic waterreservoirs.Energy storage on either the heat side or the electrical side will not be a topic of furtherevaluation in this project, as the model have not been given this property. This way,electricity- as well as heat demands will be balanced momentarily.

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