THERMAL SCIENCE

International Scientific Journal

Ilija Klasnić

,

Jasna Dragosavac

,

Zoran M. Lazarević

IMPROVED HYDROGENERATOR FIELD WINDING THERMAL MONITORING

ABSTRACT
A new monitoring method for determination of average hydrogenerator field winding temperature is introduced in order to increase the robustness of the temperature measurement system using the classic U-I method. The classic approach is prone to error due to brush voltage drop, especially when field voltage is low. Developed thermal model is based on field current and cold cooling air temperature measurements, as well on temperatures acquired from digital temperature sensors mounted across the field winding. To monitor the rotor temperature for generators with brushless excitation where field voltage and current measurements are not accessible, a mathematical model was developed to estimate the average field winding temperature based on the existing temperature monitoring of the cooling medium and mounted sensors. Importance of the proposed approach arises from the foreseen widespread use of brushless generators in distributed generation. The developed models were compared and their sensitivity was examined thoroughly.
KEYWORDS
Average field winding temperature, Temperature measurement method, Temperature estimation models, Wireless temperature measurements
PAPER SUBMITTED: 2022-12-12
PAPER REVISED: 2022-01-30
PAPER ACCEPTED: 2023-02-07
PUBLISHED ONLINE: 2023-02-25
DOI REFERENCE: https://doi.org/10.2298/TSCI221212036K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 5, PAGES [3675 - 3686]
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Improved hydrogenerator field winding thermal monitoring

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence