Power Plant Transients including Hydraulic Short Circuit Operation Mode

Christoph Geiger () and Stefan Riedelbauch
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Christoph Geiger: Institute of Fluid Mechanics and Hydraulic Machinery (IHS), University of Stuttgart, Pfaffenwaldring 10, 70569 Stuttgart, Germany
Stefan Riedelbauch: Institute of Fluid Mechanics and Hydraulic Machinery (IHS), University of Stuttgart, Pfaffenwaldring 10, 70569 Stuttgart, Germany

Energies, 2023, vol. 16, issue 11, 1-12

Abstract: Within the XFLEX HYDRO project, the possibility of increasing the flexibility of hydro power plants to support the Electric Power System (EPS) is investigated. The flexibility of the pumped-storage power plant Frades 2, as the target, should increase by extending the operating range for each unit and by using the hydraulic short circuit (HSC) operation mode. Transient investigations of the additional plant conditions are performed to ensure the safety of the plant. With a 1D model of the entire hydro power plant including both pump-turbines, valves, surge tanks, and the water-bearing components, extensive calculations are carried out to verify the safety of the existing plant for extended operation conditions. In particular, the study focuses on the synchronous and asynchronous emergency shutdowns of the plant in the new operating conditions as well as other operation-related power plant transients regarding the HSC mode. With the results presented in this paper, the flexibility of the plant Frades 2 can be increased. Delayed emergency shutdowns are identified as particularly critical during the study and should always be given additional consideration in transient investigations.

Keywords: power plant transients; hydraulic short circuit mode; synchronous emergency shutdown; asynchronous emergency shutdown (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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