Failure analysis of a run-of-the-river hydroelectric power plant

Teran, Leonel A.; Roa, C.V.; Muñoz-Cubillos, J.; Aponte, Rodríguez; Valdés, Jairo; Larrahondo, F.; Rodríguez, S.A.; Coronado, J.J.

doi:10.1016/j.engfailanal.2016.05.035

Cited by 37 publications

(11 citation statements)

References 17 publications

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“…Statistically, wear decreases the efficiency up to 25% in the first two‐year period. [ 193 ] A number of wear‐resistant coatings such as Co‐, Ni‐, and Ni 3 Al‐based alloy coatings have been explored to protect the surface from severe wear. The high wear resistance of Co‐based alloy coatings correlates to the formation of hard phases within their microstructures such as chromium, tungsten, molybdenum, and niobium carbides, while the exceptional wear resistance of Ni‐ and Ni 3 Al‐based alloy coatings is attributed to the addition of a low Si content acting as a refiner and thus reducing the grain size.…”

Section: Applications Of Wear‐resistant Materialsmentioning

confidence: 99%

Recent Progress on Wear‐Resistant Materials: Designs, Properties, and Applications

et al. 2021

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There has been tremendous interest in the development of different innovative wear‐resistant materials, which can help to reduce energy losses resulted from friction and wear by ≈40% over the next 10–15 years. This paper provides a comprehensive review of the recent progress on designs, properties, and applications of wear‐resistant materials, starting with an introduction of various advanced technologies for the fabrication of wear‐resistant materials and anti‐wear structures with their wear mechanisms. Typical strategies of surface engineering and matrix strengthening for the development of wear‐resistant materials are then analyzed, focusing on the development of coatings, surface texturing, surface hardening, architecture, and the exploration of matrix compositions, microstructures, and reinforcements. Afterward, the relationship between the wear resistance of a material and its intrinsic properties including hardness, stiffness, strength, and cyclic plasticity is discussed with underlying mechanisms, such as the lattice distortion effect, bonding strength effect, grain size effect, precipitation effect, grain boundary effect, dislocation or twinning effect. A wide range of fundamental applications, specifically in aerospace components, automobile parts, wind turbines, micro‐/nano‐electromechanical systems, atomic force microscopes, and biomedical devices are highlighted. This review is concluded with prospects on challenges and future directions in this critical field.

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Section: Applications Of Wear‐resistant Materialsmentioning

confidence: 99%

Recent Progress on Wear‐Resistant Materials: Designs, Properties, and Applications

et al. 2021

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“…Un análisis de literatura descrita en este trabajo (Thaeer et al, 2018;Kougiasa et al, 2019;Teran et al, 2016, entre otros) muestra que no existe un análisis de fallos de máquinas, estructurado con esta técnica de minería de datos, bajo un nivel de precisión igual o superior al 94%, como se ilustra en este documento. Finalmente, es importante resaltar que los resultados son válidos en el caso de estudio analizado, por lo cual es necesario extender la aplicación de la metodología a otras empresas generadoras de electricidad.…”

Section: Resultsunclassified

“…Khan et al, (2020) proponen un sistema multiagentes para mejorar los procesos de distribución y gestión de la energía, mostrando su utilidad para minimizar los costos de interrupción, maximizar la confiabilidad, y optimizar los horarios operativos. En Teran et al, (2016), se realiza un análisis, mediante técnicas matemáticas, para predecir fallas en una central hidroeléctrica colombiana. Por su parte en Nikolić et al, (2012) realizan un modelo matemático para la optimización de diagnósticos en centrales hidroeléctricas.…”

Section: Introductionunclassified

Predicción de parada de máquinas generadoras en una central hidroeléctrica por medio de minería de datos

2020

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“…Water hammer is a commonly recognized general problem in transmission penstocks, and occurs when there is an abrupt change of flow in the penstock. Some possible causes leading to water hammer include, among others, the startup (or shutdown) of hydro-turbine generator units, rapid change in transmission conditions, and opening and closure of valves [23][24][25][26][27]. Moreover, high-intensity water hammer can lead to significant damages and even disruption of the hydro-turbine governing system [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Model validation and stochastic stability of a hydro-turbine governing system under hydraulic excitations

Chen

Tolo

et al. 2018

International Journal of Electrical Power & Energy Systems

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This paper addresses the stability of a hydro-turbine governing system under hydraulic excitations. During the operation of a hydro-turbine, water hammer with different intensities occurs frequently, resulting in the stochastic change of the cross-sectional area (A) of the penstock. In this study, we first introduce a stochastic variable u to the cross-sectional area (A) of the penstock related to the intensity of water hammer. Using the Chebyshev polynomial approximation, the stochastic hydro-turbine governing model is simplified to its equivalent deterministic model, by which the dynamic characteristics of the stochastic hydro-turbine governing system can be obtained from numerical experiments. From comparisons based on an operational hydropower station, we verify that the stochastic model is suitable for describing the dynamic behaviors of the hydro-turbine governing system in full-scale applications. We also analyze the change laws of the dynamic variables under increasing stochastic intensity. Moreover, the differential coefficient with different values is used to study the stability of the system, and stability of the hydro-turbine flow with the increasing load disturbance is also presented. Finally, all of the above numerical results supply some basis for modeling efficiently the operation of large hydropower stations.

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Failure analysis of a run-of-the-river hydroelectric power plant

Cited by 37 publications

References 17 publications

Recent Progress on Wear‐Resistant Materials: Designs, Properties, and Applications

Recent Progress on Wear‐Resistant Materials: Designs, Properties, and Applications

Predicción de parada de máquinas generadoras en una central hidroeléctrica por medio de minería de datos

Model validation and stochastic stability of a hydro-turbine governing system under hydraulic excitations

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