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논문 기본 정보

자료유형
학술대회자료
저자정보
Zhu Lihua (Tianjin Polytechnic University) Li Weizheng (Tianjin Polytechnic University) He Zhiwei (Chungbuk National University) Chang-seop Koh (Chungbuk National University)
저널정보
대한전기학회 대한전기학회 학술대회 논문집 2019년도 제50회 대한전기학회 하계학술대회
발행연도
2019.7
수록면
1,062 - 1,065 (4page)

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초록· 키워드

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Power transformer is widely used as the key equipment of power transmission system. At the same time, with the improvement of people"s awareness of environmental protection, the problem of core vibration in the operation of transformer has attracted more and more attention. The vibration of transformer core is mainly caused by magnetostriction(MS) and electromagnetic force(EF) and that the transformer corner is the concentrated reflection area is universally acknowledged. A three-dimensional model for a square ring core containing the overlap area of the corner is firstly developed and then the distribution of MS and EF and the vibration displacement caused by the two forces acting alone are calculated under normal working conditions. At the same time, the transformer may work in abnormal working conditions such as DC bias or harmonics, which will cause MS and EF to increase in varying degrees. The contribution of MS and EF to core vibration under different working conditions is analyzed and a conclusion is drawn that EF is much smaller than MS in normal working condition, but under abnormal working conditions, EF increases rapidly and should not be neglected.

목차

Abstract
Ⅰ. INTRODUCTION
Ⅱ. MAGNETIC AND VIBRATION ANALYSIS
Ⅲ. SIMULATING CALCULATION
Ⅳ. CONCLUSIONS
Ⅴ. REFERENCES

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