Flexibilisierung von Dampfkraftwerken mittels dynamischer Prozesssimulation (English shop)

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Integrating the growing generation capacities of renewable energies into the existing infrastructure of the German electricity industry is one of the major challenges of the coming years and decades. This work examines the challenges facing conventional power plants that arise from the upheavals in the German energy market. It is shown that German hard coal-fired power plants in particular will have to compensate for the fluctuating feed-in from renewable energies in the coming years.

In order to investigate the flexibility of large thermal steam power plants methodically, a large steam power plant is modelled in the present work with the aid of a transient simulation program. To establish the technical fundamentals, the operating principles of modern hard coal-fired power plants are explained and the concept of flexibility is subsequently examined in detail. From this, requirements for the model to be developed are derived. It is then described in detail how these requirements are implemented in the modelling of the reference power plant. The overall power plant system is divided into four subsystems — air and flue gas side, fuel supply, turbines with feedwater heaters, and steam generator — and described. The completed model is first verified against the manufacturer’s steady-state design data. The transient performance of the developed power plant model is then verified against operational data. Finally, several technical optimisations are investigated with a view to increasing the flexibility of the plant. In this context, the potential of the power plant model for future investigations of large power plants is highlighted.