In many parts of the world, the impact of renewable energy, especially from intermittent sources as wind and solar is continuously increasing. In Germany, the share of renewable energy in electricity production is believed to increase from 32.5% in 2015 to 50% in 2030. In order to operate an electrical system and control the mains frequency, the power supply must match the consumption at any time. Ancillary services like primary and secondary control are used to balance the system on a time-scale of several seconds up to 15 minutes. Those control reserves are usually provided by thermal power plants. Particularly in times of high shares of fluctuating renewable feed-in, thermal power plants are turned off or operated at minimum load to avoid electricity production at low electricity prices. However, an amount of about 3000 MW of fast responding primary control need to be provided in the European network of transmission system operators for electricity grid to maintain stable operation even in case of two simultaneous large unit outages. This requirement leads to situations, where thermal power plants are operated in minimum load below their marginal cost to provide control reserves even if there is a surplus of energy in the grid. Operation in low load while at the same time providing control reserves leads to new challenges. As the relation between energy production and the thermal storage capacities provided by the metal and fluid mass in the boiler is decreasing with the load, the ability of responding to control demands is naturally slowed down. Dynamic simulation of the thermodynamic power plant process turned out to be an efficient method to investigate such operational modes. Using comprehensive process models coupled with a control system model, equipment adaptions or control system updates can be evaluated in order to provide faster responses. By increasing the specific amount of ancillary services per unit, the number of units necessary to provide the total amount of primary and secondary control could be reduced in situations with energy surplus.
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ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum
June 26–30, 2017
Charlotte, North Carolina, USA
Conference Sponsors:
- Power Division
- Advanced Energy Systems Division
- Solar Energy Division
- Nuclear Engineering Division
ISBN:
978-0-7918-5761-8
PROCEEDINGS PAPER
Simulation of Ancillary Services in Thermal Power Plants in Energy Systems With High Impact of Renewable Energy
Moritz Huebel,
Moritz Huebel
University of Rostock, Rostock, Germany
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Jens Hinrich Prause,
Jens Hinrich Prause
University of Rostock, Rostock, Germany
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Sebastian Meinke,
Sebastian Meinke
Lausitz Energie Kraftwerke AG, Cottbus, Germany
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Egon Hassel
Egon Hassel
University of Rostock, Rostock, Germany
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Moritz Huebel
University of Rostock, Rostock, Germany
Conrad Gierow
FVTR GmbH, Rostock, Germany
Jens Hinrich Prause
University of Rostock, Rostock, Germany
Sebastian Meinke
Lausitz Energie Kraftwerke AG, Cottbus, Germany
Egon Hassel
University of Rostock, Rostock, Germany
Paper No:
POWER-ICOPE2017-3258, V002T08A008; 9 pages
Published Online:
September 5, 2017
Citation
Huebel, M, Gierow, C, Prause, JH, Meinke, S, & Hassel, E. "Simulation of Ancillary Services in Thermal Power Plants in Energy Systems With High Impact of Renewable Energy." Proceedings of the ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. Charlotte, North Carolina, USA. June 26–30, 2017. V002T08A008. ASME. https://doi.org/10.1115/POWER-ICOPE2017-3258
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