| Autor: |
Hübel, M., Gierow, C., Richter, M., Nocke, J., Hassel, E., Ziems, C., Berndt, A., Weber, H. |
| Předmět: |
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| Zdroj: |
Proceedings of the 13th International Workshop on Large - Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Plants; 2014, p61-66, 6p |
| Abstrakt: |
As the share of fluctuating renewable energy in the German electric energy system is continuously increasing, conventional power plants face new challenges in balancing the system. The effects of this highly dynamic operation on the power plants are uncertain. In a previous study, the effects of a more flexible operation on a hard-coal fired power plant and a gas-turbine fired power plant has been investigated [1], [2]. Another very common type of conventional power plants in Germany are the lignite power plants. In order to investigate the effects of a more dynamic operation caused by an unsteady production of wind and solar energy, a detailed physical based model of a lignite power plant has been developed [3]. The model involves the main components of the power plant including the water-steam cycle as well as the flue-gas side and the control system. Based on the prognosis of the development of wind and solar energy, future power plant schedules can be developed and compared to the current operation [4]. Using the detailed thermodynamic model, the effects of integrating more wind energy on a specific power plant is calculated. It will be shown, how temperature and pressure in critical components is changing in dynamic operation and therefore causing mechanical and thermal stress. As a consequence, lifetime consumption due to cyclic operation can be evaluated. Furthermore the model is used to improve the existing power plants regarding flexibility in order to mitigate negative effects and increase the capacity for fluctuating renewable energies and therefore providing a short-term solution to balance the electric energy system. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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