山西电子技术
山西電子技術
산서전자기술
SHANXI ELECTRONIC TECHNOLOGY
2011年
6期
6-7
,共2页
电缆故障测距%电桥回线法%故障性质%三相短路接地%辅助电缆%测试回路
電纜故障測距%電橋迴線法%故障性質%三相短路接地%輔助電纜%測試迴路
전람고장측거%전교회선법%고장성질%삼상단로접지%보조전람%측시회로
cable fault location%bridge back line method%fault properties%three-phase short-circuit grounding%auxiliary cable%testing loop
在电力电缆故障探测中,电桥回线法是有效的测距方法之一。但是,当电缆发生三相短路接地故障时,由于被测电缆没有完好相线,使得这一方法的应用受到测试条件的限制。根据现场条件,采用不同辅助电缆构成的电桥测试回路,可以解决这类性质电缆故障的测距问题。若辅助电缆与被测电缆的截面积、导体材料不同时,可在测算公式中引入两者的截面积和电阻系数。因此,为解决被测电缆没有完好相的故障测距问题,打开了一个方便之门。同时,也进一步扩宽了电桥回线法在电缆故障测距中的应用范围。
在電力電纜故障探測中,電橋迴線法是有效的測距方法之一。但是,噹電纜髮生三相短路接地故障時,由于被測電纜沒有完好相線,使得這一方法的應用受到測試條件的限製。根據現場條件,採用不同輔助電纜構成的電橋測試迴路,可以解決這類性質電纜故障的測距問題。若輔助電纜與被測電纜的截麵積、導體材料不同時,可在測算公式中引入兩者的截麵積和電阻繫數。因此,為解決被測電纜沒有完好相的故障測距問題,打開瞭一箇方便之門。同時,也進一步擴寬瞭電橋迴線法在電纜故障測距中的應用範圍。
재전력전람고장탐측중,전교회선법시유효적측거방법지일。단시,당전람발생삼상단로접지고장시,유우피측전람몰유완호상선,사득저일방법적응용수도측시조건적한제。근거현장조건,채용불동보조전람구성적전교측시회로,가이해결저류성질전람고장적측거문제。약보조전람여피측전람적절면적、도체재료불동시,가재측산공식중인입량자적절면적화전조계수。인차,위해결피측전람몰유완호상적고장측거문제,타개료일개방편지문。동시,야진일보확관료전교회선법재전람고장측거중적응용범위。
Bridge back line method is one of the most effective means for measuring distance during the power cable fault detec- tion. However, that limits the application of this method by testing conditions when the three-phase short-circuit causes cable grounding faults because of measured cable without complete phase line. According to the site conditions, using the bridge tests loop with different auxiliary cable can solve the ranging problem of this kind of fault cables. When the sectional area and conducting materials of auxiliary cable is different from the measured cable, then the sectional area and resistance coefficient of both can be imported in calculate formu- la. So, it provides convenience for solving the fault location of measured cable without complete phase line. In the meantime, it also expands the scope of application of bridge back line method for cable fault location.