Original scientific paper
INVESTIGATION OF IMPACT OF MAGNETIC SHUNT PARAMETERS ON TEMPERATURE DISTRIBUTION IN TRANFORMER TANKS
Saravanan Selvaraj
orcid.org/0000-0003-0773-2522
; Crompton Greaves Ltd. India
Ronny Mertens
; CG Power Systems. Belgium NV
Geert Caluwaerts
; CG Power Systems. Belgium NV.
Mahesh B. Varrier
; Crompton Greaves Ltd. India
Rafiq Mathersa
; Crompton Greaves Ltd. India
Abstract
A set of reduced order models are developed to validate finite element based calculation of
temperature distribution in solid and laminated magnetic structures in transformers with high current
carrying conductors. Model details, measured and calculated losses and temperature of the models are
presented. Effect of magnetic shunt type and its alignment with respect to stray flux direction on
temperature distribution in the reduced order model are analyzed.
The magneto-thermal coupled field analysis methodology is applied to estimate the temperature
distribution in Multi-Utility transformer, showed temperature higher than expected. Different cases of tank
cover plate with electromagnetic shield , thicker magnetic shunts, and with non magnetic cover plate are
analyzed to reduce the temperature.
With the modified shunt arrangement, the transformer passed the test as temperature were
reduced by 100˚C.
Keywords
Transformer; HCCC; Stray losses; Magnetic shunts; FEM; Magneto-Thermal
Hrčak ID:
199245
URI
Publication date:
15.8.2017.
Visits: 1.039 *