CAJ | 학술논문

叙述了如何通过ANSYS分析计算典型500 kV电流互感器电场分布的方法,并得出典型500 kV电流互感器的电场分布。计算结果表明,接地屏蔽管与 SF6气体间隙分界面、一次绕组与 SF6气体间隙分界面、悬浮电位和高压电位屏蔽罩表面与 SF6气体间隙分界面均是最大电场强度较大的区域,最大电场强度分别达到7.85 kV/mm、6.57 kV/mm和5.81 kV/mm,相对来说更容易称为气体绝缘的薄弱部位。在这些区域如果出现金属突出物、金属碎屑等物质时容易导致严重的电场畸变,从而造成严重的安全隐患。在涉及500 kV典型电流互感器的故障模拟试验中,可以针对这些薄弱环节进行故障模拟试验。
서술료여하통과ANSYS분석계산전형500 kV전류호감기전장분포적방법,병득출전형500 kV전류호감기적전장분포。계산결과표명,접지병폐관여 SF6기체간극분계면、일차요조여 SF6기체간극분계면、현부전위화고압전위병폐조표면여 SF6기체간극분계면균시최대전장강도교대적구역,최대전장강도분별체도7.85 kV/mm、6.57 kV/mm화5.81 kV/mm,상대래설경용역칭위기체절연적박약부위。재저사구역여과출현금속돌출물、금속쇄설등물질시용역도치엄중적전장기변,종이조성엄중적안전은환。재섭급500 kV전형전류호감기적고장모의시험중,가이침대저사박약배절진행고장모의시험。
This paper describes method how to analyze and calculate electric field distribution of typical 500 kV current trans-former by using ANSYS and gains a result.The calculation result indicates that the interface between grounding screen tube and SF6 gas gap,the interface between primary winding and SF6 gas gap and the interface between screen tubes of suspended potential and high voltage potential and SF6 gas gap are major areas of maximum electric field intensity.The maximum elec-tric field intensity is respectively reaching to 7.85 kV/mm,6.57 kV/mm and 5.81 kV/mm which comparatively means weak part for gas insulation.If there are some substances such as metal protrusions and fragments in these areas,it is easy to cause serious electric field distortion which may result in serious potential safety hazard.In fault simulation testing for 500 kV typical current transformer,it is suggested to proceed fault simulation testing for these weak links.