Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1997.11a
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- Pages.388-390
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- 1997
Measurement of winding deformation in transformers using low voltage impulse
저압충격을 이용한 변압기에서 권선변형 측정
- Cho, Kook-Hee (KERI) ;
- Kang, Dong-Sik (KERI) ;
- Kim, Kwang-Hwa (KERI) ;
- Kweon, Dong-Jin (KEPRI)
- Published : 1997.11.29
Abstract
We describe the characteristic of LVI(Low-voltage Impulse) test system and methods to detect the deformation of windings in the power transformers. Any winding deformation will result in a change of capacitance between winding parts and possibly some change in the winding inductance. These changes will then result in a change in the responce to the applied pulse in both the magnitude and period of the resulting oscillations. A results of measured differential method in stead of typical method, the sensitivity is greatly improved by the use of differential methods where the pulse is applied to two identical windings and the response measured with a differential amplifier.
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