电工电气
電工電氣
전공전기
ELECTROTECHNICS ELECTRIC
2015年
6期
51-57
,共7页
苏安%庚振新%肖婉秋%徐建源%林莘
囌安%庚振新%肖婉鞦%徐建源%林莘
소안%경진신%초완추%서건원%림신
气体绝缘金属封闭开关设备%支持绝缘子%应力%振动
氣體絕緣金屬封閉開關設備%支持絕緣子%應力%振動
기체절연금속봉폐개관설비%지지절연자%응력%진동
gas insulated metal-enclosed switchgear%supporting insulator%stress%vibration
以1100 kV气体绝缘金属封闭开关设备(GIS)母线为研究对象，采用有限元的方法，针对GIS母线在导体对外壳短路、导体悬臂、运输颠簸三种情况，对支持绝缘子所承受的应力进行计算。对比母线自振频率，对GIS母线筒在导体安装偏心导致的偏心电动力与高速风载荷下的振动进行分析。计算结果表明：在现场安装过程中，因导体支撑不稳导致导体悬臂时，绝缘子根部产生的应力最大，可达到绝缘子许用应力的80%以上，需要特别注意；若GIS母线发生短路故障，考虑壳体电阻对电流的影响，当短路点与接地点均位于壳体正上方时，绝缘子根部嵌件与环氧树脂的粘接面产生的应力最大，最大值为27.1 MPa，在最大短路电动力的作用下，能保证支持绝缘子机械性能的最佳嵌件半径为70 mm；在计算条件下，母线在偏心电动力以及高速风载荷的作用下，发生共振的可能性较小。
以1100 kV氣體絕緣金屬封閉開關設備(GIS)母線為研究對象，採用有限元的方法，針對GIS母線在導體對外殼短路、導體懸臂、運輸顛簸三種情況，對支持絕緣子所承受的應力進行計算。對比母線自振頻率，對GIS母線筒在導體安裝偏心導緻的偏心電動力與高速風載荷下的振動進行分析。計算結果錶明：在現場安裝過程中，因導體支撐不穩導緻導體懸臂時，絕緣子根部產生的應力最大，可達到絕緣子許用應力的80%以上，需要特彆註意；若GIS母線髮生短路故障，攷慮殼體電阻對電流的影響，噹短路點與接地點均位于殼體正上方時，絕緣子根部嵌件與環氧樹脂的粘接麵產生的應力最大，最大值為27.1 MPa，在最大短路電動力的作用下，能保證支持絕緣子機械性能的最佳嵌件半徑為70 mm；在計算條件下，母線在偏心電動力以及高速風載荷的作用下，髮生共振的可能性較小。
이1100 kV기체절연금속봉폐개관설비(GIS)모선위연구대상，채용유한원적방법，침대GIS모선재도체대외각단로、도체현비、운수전파삼충정황，대지지절연자소승수적응력진행계산。대비모선자진빈솔，대GIS모선통재도체안장편심도치적편심전동력여고속풍재하하적진동진행분석。계산결과표명：재현장안장과정중，인도체지탱불은도치도체현비시，절연자근부산생적응력최대，가체도절연자허용응력적80%이상，수요특별주의；약GIS모선발생단로고장，고필각체전조대전류적영향，당단로점여접지점균위우각체정상방시，절연자근부감건여배양수지적점접면산생적응력최대，최대치위27.1 MPa，재최대단로전동력적작용하，능보증지지절연자궤계성능적최가감건반경위70 mm；재계산조건하，모선재편심전동력이급고속풍재하적작용하，발생공진적가능성교소。
In the case of 1 100 kVgas insulated metal-enclosed switchgear busbar conductor was in short circuit for shell, conductor canti-levered and transportation bumps, the ifnite element analysis method was adopted to calculate the stress of the support insulator. Comparing with the bus natural frequency of vibration, this paper analyzed the gas insulated metal-enclosed switchgear busbar vibration under the ec-centric electric power caused by conductor installation eccentricity and the load of high speed wind. The calculation results show that in the process of onsite installation, the maximum of the stress caused by unstable conductor supporting cantilever, appears at the root of insulator, up to 80%of the admissible stress of insulator. If gas insulated metal-enclosed switchgear busbar short circuit fault occurs, considering the inlfuence of the shell resistance to current, when the short-circuit point and the ground point are directly above the shell, the greatest stress is produced at root of the insulator and the insert epoxy resin adhesive surface, the maximum is 27.1 MPa. The insert radius which has the best mechanical properties of support insulators is 70 mm. Under the condition of this calculation, the busbar in an eccentric electric power and high-speed wind load effect, the possibility of resonance is smaller.
