The effect of large-scale wind power on a thermal system operation

Hannele Holttinen, J. Pedersen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

The impacts of large-scale wind power to a thermal system have been simulated for the West Denmark power system. The West Denmark power system is characterised by large transmission capabilities to both the Nordic and Central Europe systems. The exchange to neighbouring countries has been part of the simulations, with different scenarios for transmission possibilities and prices at the market. Wind power was increased at 10 % intervals, from 0 to 40 % of wind power penetration of gross demand (energy). The goal was to see the change in exchange, surplus power, emissions, thermal efficiency and regulation, due to increasing amounts of wind power. According to the simulations, wind power will increase the exports and decrease the imports to West Denmark. The total efficiency of the thermal power and heat production will be slightly increased due to wind power. This is due to better total efficiency for heat and power plants when operating at lower power to heat ratios. However, there will be increased cost per produced MWh for the thermal system, as the wind power penetration gets higher. The value of wind power is near average market price for the first 10 % of wind power, reducing as penetration increases. At 40 % penetration level, only half of the increased regulation due to wind power forecast errors can be provided by the existing thermal power plants, if there is no transmission capacity and not all CHP plants participate in the regulation. If transmission capacity is included in the simulation, most of the down-regulation will come from exchange. Increase in total start-up costs for the system and decrease in emissions can only be seen for the no transmission case. Most of the effects of wind power are dissipated to other parts of the power system than the West Denmark area studied, with the transmission possibilities to neighbouring countries available. This is a reasonable result from simulating a small area in a large power system, but also rises discussion in the paper about the ability of scheduling models' ability to capture the effects of large-scale wind power to the system operation.
Original languageEnglish
Title of host publicationProceedings of the 4th International Workshop on Large-Scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms
Place of PublicationStockholm
PublisherKTH Royal Institute of Technology
Number of pages7
Publication statusPublished - 2003
MoE publication typeNot Eligible
Event4th International Workshop on Large-Scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms - Billund, Denmark
Duration: 20 Oct 200322 Oct 2003

Conference

Conference4th International Workshop on Large-Scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms
CountryDenmark
CityBillund
Period20/10/0322/10/03

Keywords

  • wind energy
  • energy system modeling

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