Monitoring of moisture on stator winding insulation during drying process

Jayantha, G. A., Fernando, M. A. R. M. and Ekanayake, C. M. B. (2009). Monitoring of moisture on stator winding insulation during drying process. In: ICIIS 2009 - 4th International Conference on Industrial and Information Systems 2009, Conference Proceedings. 4th International Conference on Industrial and Information Systems 2009, ICIIS 2009, Peradeniya, (483-488). 28 - 31 December 2009. doi:10.1109/ICIINFS.2009.5429814


Author Jayantha, G. A.
Fernando, M. A. R. M.
Ekanayake, C. M. B.
Title of paper Monitoring of moisture on stator winding insulation during drying process
Conference name 4th International Conference on Industrial and Information Systems 2009, ICIIS 2009
Conference location Peradeniya
Conference dates 28 - 31 December 2009
Proceedings title ICIIS 2009 - 4th International Conference on Industrial and Information Systems 2009, Conference Proceedings
Place of Publication Piscataway, NJ United States
Publisher I E E E
Publication Year 2009
Year available 2009
Sub-type Fully published paper
DOI 10.1109/ICIINFS.2009.5429814
Open Access Status
ISBN 9781424448371
9781424448364
Start page 483
End page 488
Total pages 6
Language eng
Abstract/Summary This paper presents the condition assessment of generator stator winding due to moisture ingress in their asphalt, polyester and epoxy mica insulations. The work has two parts i.e. laboratory and field investigations. In the laboratory investigations, two naturally wetted asphalt mica and two dry (polyester and epoxy mica one each) spare stator windings were tested using, dc ramp test, time variation of insulation resistance (IR) and frequency dielectric spectroscopy (FDS) measurements. The two wet samples were dried inside an oven whereas the dry samples were wetted inside a water bath. The dc ramp and IR tests repeated on them and finally FDS measurements were also taken. The results were compared among the different test methods and dc ramp test was used for field investigation due to its simplicity and cost effectiveness. In the field investigations, seven selected hydro and one thermal generators belonging to Ceylon Electricity Board was tested. It was found that dc ramp test can be used effectively to investigate the moisture effect on generator insulation.
Subjects 1709 Human-Computer Interaction
1710 Information Systems
2207 Control and Systems Engineering
2208 Electrical and Electronic Engineering
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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