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

64 Building the Mathematical ModelRatet capacities commissioned Primary fuel Source Capacities for UC modelName Block El. [MW] Heat [MW] year Heat [MW] name unit G(i ) El. [MW] Heat [MW]Nordjyllandsværket NJV 3 410 420 1997 Coal Vattenfall G1 400 450Studstrupsværket SSV 3 350 455 1985 Coal DONG Energy G2 350 450Studstrupsværket SSV 4 350 455 1985 Coal DONG Energy G3 350 450Esbjergværket ESV3 378 460 1992 Coal DONG Energy G4 400 500Fynsværket FYV3 235 340 1974 Coal Vattenfall G5 250 350Fynsværket FYV7 362 475 1991 Coal Vattenfall G6 400 475Skærbækværket SKV3 392 444 1997 Coal DONG Energy G7 400 450Nordjyllandsværket NJV 2 225 42 1977 Coal Vattenfall G8 250 ~ 0Enstedsværket ENV3 626 85 1979 Coal DONG Energy G9 650 ~ 0Total 3328 3176 - - - - 3450 3125Table 5.2, Using real data from central utilities in West-DK for use in model. The capacities arerounded (data source: DONG energy 2009, Vattenfall 2009).Calculation of marginal production costsThe source data behind the calculation of the marginal prices are listed in Table 5.3. Thecurrency is stated in Dkk because this was the currency used when the results wereprocessed. Final results will be presented in Euros 21 .Source data:Energy prices Callorific values CO2 costs currency: O&M per MWh,fuelCoal price Gas price Coal CO2 price Coal Gas Dkk / € Central Decentralized450 [Dkk/ton] 45 [Dkk/GJ] 24,40 [GJ/ton] 150 [Dkk/ton] 0,34 [t CO2/MWh] 0,2 [t CO2/MWh] 7,56 [Dkk/€] 13,6 [Dkk/MWh] 19 [Dkk/MWh]Table 5.3, Key numbers for calculating marginal gen. costs. (Data sources: Danish Energy Authorities2005) * Final value assumedThe marginal costs of thermal power facilities have traditionally been highly sensitive tochanges in fuel prices, and since the introduction of CO2 quotes, sensitive to them aswell. The graph to the left of Figure 5.7a shows how prices on coal (which is the mainenergy source for el. generation in the Danish power system), have increased dramaticallythe resent years, peaking in July 2008, and then dropping to a much lower level by theend of the same year. It could seem as if a more stable coal price have recently emergedfrom the fog of various economic speculations and capacity issues that have characterizedrecent year’s overheated economic system. From this economic point of view, a coalprice of 60 € is selected as the constant price in this project. In Figure 5.7b to the right isseen how the marginal generation costs of backpressure units are sensitive towardschanges in the Natural Gas price, and central units being sensitive to the CO2 price (dueto a high emission factor).Coal price development21100 DKK = 765 Euro

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