绝缘材料
絕緣材料
절연재료
Insulating Materials
2015年
11期
59-63,68
,共6页
蒋晓娟%梁惟钢%夏俊峰%孙建生
蔣曉娟%樑惟鋼%夏俊峰%孫建生
장효연%량유강%하준봉%손건생
电力电缆%冷缩式中间接头%气隙%半导电层电阻率%电场强度%故障分析
電力電纜%冷縮式中間接頭%氣隙%半導電層電阻率%電場彊度%故障分析
전력전람%랭축식중간접두%기극%반도전층전조솔%전장강도%고장분석
power cable%cool shrinkable joint%air gap%resistivity of semi-conductive layer%electric field%fault analysis
通过对含有气隙缺陷的冷缩式中间接头建立物理模型，采用等效电路法分析了气隙尺寸、压接管外绕包半导电层的电阻率对气隙场强的影响。结果表明：气隙尺寸与场强成反比关系，当半导电层的电阻率超过一定值时，气隙场强会显著提升，超过空气最大击穿场强。通过对两例实际接头故障情况的分析，得出与模型分析一致的结论，并提出预防措施，为今后35 kV中压电力电缆接头故障的预防及原因分析提供参考。
通過對含有氣隙缺陷的冷縮式中間接頭建立物理模型，採用等效電路法分析瞭氣隙呎吋、壓接管外繞包半導電層的電阻率對氣隙場彊的影響。結果錶明：氣隙呎吋與場彊成反比關繫，噹半導電層的電阻率超過一定值時，氣隙場彊會顯著提升，超過空氣最大擊穿場彊。通過對兩例實際接頭故障情況的分析，得齣與模型分析一緻的結論，併提齣預防措施，為今後35 kV中壓電力電纜接頭故障的預防及原因分析提供參攷。
통과대함유기극결함적랭축식중간접두건립물리모형，채용등효전로법분석료기극척촌、압접관외요포반도전층적전조솔대기극장강적영향。결과표명：기극척촌여장강성반비관계，당반도전층적전조솔초과일정치시，기극장강회현저제승，초과공기최대격천장강。통과대량례실제접두고장정황적분석，득출여모형분석일치적결론，병제출예방조시，위금후35 kV중압전력전람접두고장적예방급원인분석제공삼고。
A physical model of cool shrinkable joint with air gap defect was established, and the influence of air gap size and resistivity of semi-conductive layer of pressure pipe on the electric field of air gap was analyzed by the equivalent circuit method. The results show that the air gap size is inversely proportional to the electric field. When the resistivity of semi-conductive layer exceeds a certain value, the electric field of air gap will increase significantly, which is over the maximum breakdown strength of air. Through the analysis of two actual joint fault cases, we obtain the consistent conclusion and present prevention measures, which can provide a reference for future fault prevention and reason anlysis of 35 kV medium voltage power cable joints.
