Back to Search
Start Over
Advanced condition monitoring of Pelton turbines
- Source :
- Scopus-Elsevier, UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC), Recercat. Dipósit de la Recerca de Catalunya, instname
-
Abstract
- The ability of hydropower to adapt the electricity generation to the demand is necessary to integrate wind and solar energy into the electrical grid. Nowadays, hydropower turbines are required to work under harsher operating conditions and an advanced condition monitoring to detect damage is crucial. In this paper the methodology to improve the condition monitoring of Pelton turbines is presented. First, the field data obtained from the vibration monitoring of 28 different Pelton turbines over 25 years has been studied. The main types of damage found were due to fatigue, cavitation and silt erosion. By analyzing the vibration signatures before and after maintenance tasks, the symptoms of damage detected from the measuring locations were determined for each case. Second, a theoretical model using numerical methods (FEM) was created in order to simulate the dynamic behavior of the turbine. The model was validated with the results obtained from on-site tests that were carried out in an existing turbine. The deformations and the stresses of the runner under different operating conditions could then be computed. The calibrated model was used to analyze in detail the effect of misalignment between nozzle and runner. In historic cases, this abnormal operating condition lead to severe damage in the turbine, due to the effect of fatigue in some locations of the buckets. The model reproduced well the symptoms detected in the field measurements. The stresses could be calculated, which eventually can be used to estimate the remaining useful life of the turbine.
- Subjects :
- Jet misaligment
Energies [Àrees temàtiques de la UPC]
020209 energy
Nozzle
Turbines
Energies::Energia hidràulica [Àrees temàtiques de la UPC]
02 engineering and technology
Vibració
Water-power
Dynamic behavior
Turbine
Vibration
Numerical model
Energia hidràulica
Pelton turbines
Enginyeria mecànica [Àrees temàtiques de la UPC]
0203 mechanical engineering
0202 electrical engineering, electronic engineering, information engineering
Enginyeria mecànica::Mecànica [Àrees temàtiques de la UPC]
Field data analysis
Turbines hidràuliques
Electrical and Electronic Engineering
Instrumentation
Hydropower
Hydraulic turbines
business.industry
Applied Mathematics
Condition monitoring
Condensed Matter Physics
Electrical grid
Finite element method
020303 mechanical engineering & transports
Electricity generation
Environmental science
business
Marine engineering
Enginyeria mecànica::Mecànica de fluids [Àrees temàtiques de la UPC]
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Scopus-Elsevier, UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC), Recercat. Dipósit de la Recerca de Catalunya, instname
- Accession number :
- edsair.doi.dedup.....3e18599ce02fdfd6fe902741ef58dbd5