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Prof. PhD. Eng., Department: Hydraulics, Hydraulic machinery and Environmental Engineering, Faculty Power Engineering, University Politehnica of Bucharest, Romania Scientific activity: 14 published books, 64-articles in national and international specialized revues, Research activity: over 50 contracts with national partners, 20 as Project Leader and 3 international Member: National: Technical Scientists Romanian Association, Society Computer Assisted Engineering, Romanian Society Physics, Member National Council and Vice-president in Bucharest Section International: European Expert FP7 projects, Expert Young Energy, International associations: EWEA-Green Group, WEC World Energy Council, Member ASHM- Association of Small Hydro Management, Member CME-CNE, Societe Europeene de Physique, Member IEEE number: 94539736 Member ASME
About ten hydroelectric power plants realized from 1970 to 1990 in Romania are confronted with stator overheating. The developed mathematical model analyzes the voltage stability based on modal analysis of the Jacobian matrix, identifying the hazardous modes of variation between voltage and flow rate, correlated with the characteristics of the analyzed generators and their response to these variations. Vulnerable elements in the system for inductive and capacitive modes of operation are identified. In these conditions, hydro generators cannot attend the secondary voltage control, not even for a frequency power dependency control. The elaborated mathematical model was tested at the hydroelectric power plants Gilceag, Mariselu, and Susag with similar functioning conditions. The necessary conditions for stator ventilation and variation of flow hydrodynamic parameters during the operation were established. The theoretical model was tested with an experimental method applied separately for the thermal and ventilation conditions. Some results obtained during the measurements are illustrated and correlated with the theoretical results. The model was tested to prevent the onset instability of voltage drops and accelerated overheating. Finally, some solutions to minimize the stators overheating based on local conditions are recommended.
Victorita Radulescu. Research and Solutions to Minimize Frontal Area Overheating of Hydro Generator Stator with Vertical Axis. Energies 2021, 14, 1243 .
AMA StyleVictorita Radulescu. Research and Solutions to Minimize Frontal Area Overheating of Hydro Generator Stator with Vertical Axis. Energies. 2021; 14 (5):1243.
Chicago/Turabian StyleVictorita Radulescu. 2021. "Research and Solutions to Minimize Frontal Area Overheating of Hydro Generator Stator with Vertical Axis." Energies 14, no. 5: 1243.