Risk of Penstock Fatigue in Pumped-Storage Power Plants Operating with Variable Speed in Pumping Mode

Martínez de Lucas, Guillermo and Pérez Díaz, Juan Ignacio and Chazarra Jover, Manuel Joaquín and Sarasúa Moreno, José Ignacio and Cavazzini, Giovanna and Pavesi, Giorgio and Ardizzon, Guido (2019). Risk of Penstock Fatigue in Pumped-Storage Power Plants Operating with Variable Speed in Pumping Mode. "Renewable Energy", v. 133 ; pp. 636-646. ISSN 0960-1481. https://doi.org/10.1016/j.renene.2018.10.060.

Description

Title: Risk of Penstock Fatigue in Pumped-Storage Power Plants Operating with Variable Speed in Pumping Mode
Author/s:
  • Martínez de Lucas, Guillermo
  • Pérez Díaz, Juan Ignacio
  • Chazarra Jover, Manuel Joaquín
  • Sarasúa Moreno, José Ignacio
  • Cavazzini, Giovanna
  • Pavesi, Giorgio
  • Ardizzon, Guido
Item Type: Article
Título de Revista/Publicación: Renewable Energy
Date: 2019
ISSN: 0960-1481
Volume: 133
Subjects:
Freetext Keywords: Failure Analysis, Power Plant, Fatigue Life, Structural Failure, Simulation Test
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Hidráulica, Energía y Medio Ambiente
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The upgrade of a pumped-storage power plant (PSPP) to allow variable speed operation offer several advantages in pumping and generating modes. However, in pumping mode at part load, both pressure and torque pulsations develop in the pump turbine runner. This paper evaluates the risk of fatigue damage in the penstock of a variable-speed PSPP due to the propagation of the pressure pulsations developing in the pump turbine runner at partial load in pumping mode. For that purpose, a simulation model of a variable-speed PSPP has been developed. The pressure and torque pulsations are generated each from a different set of sinusoidal functions calibrated from the results of a Computational Fluid Dynamic model, which was in turn validated from experimental data. A Monte Carlo simulation has been performed considering different temporal gaps between the sinusoidal functions reproducing the pressure pulsations in one and another pump turbine. The number of stress cycles that may cause fatigue damage in the penstock has been obtained from the results of the simulations and the fatigue curves defined in the Eurocode, and then transformed into the maximum number of hours per year the PSPP can operate at partial load in pumping mode to avoid fatigue damages.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainENE2012-32207UnspecifiedUnspecifiedOptimal Operation and Control of Pumped-Storage Hydropower Plants

More information

Item ID: 52743
DC Identifier: http://oa.upm.es/52743/
OAI Identifier: oai:oa.upm.es:52743
DOI: 10.1016/j.renene.2018.10.060
Official URL: https://www.sciencedirect.com/science/article/pii/S0960148118312448?via%3Dihub
Deposited by: Memoria Investigacion
Deposited on: 23 Oct 2018 07:55
Last Modified: 01 May 2021 22:30
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