35kV典型電纜故障修復(fù)方法研究
發(fā)布時(shí)間：2018-12-12 09:05
【摘要】：隨著社會(huì)的發(fā)展和城市化率的不斷提高,市區(qū)輸電線路廣泛的以電纜的方式敷設(shè)于地下,可以節(jié)省地面空間而且更加安全,但是一旦電纜線路發(fā)生故障,電纜故障的測尋和修復(fù)都十分困難。目前沒有任何一種監(jiān)測方法能完全避免電纜缺陷發(fā)展為電纜故障,外力破壞電纜的事故也無法杜絕。所以,一旦電纜發(fā)生故障,如何快速修復(fù)電纜,節(jié)約修復(fù)材料、費(fèi)用成為關(guān)鍵問題。按照現(xiàn)有的技術(shù),電纜發(fā)生單相故障,修復(fù)電纜時(shí),基于電纜三相絕緣完整性的考慮,要將故障部分鋸掉,重新更換一段電纜,再重新制作兩組三相的電纜接頭。如果電纜只發(fā)生單相故障,如果完全更換,這樣不僅耗費(fèi)材料較多,而且安裝電纜接頭、開挖接頭坑需要更多的人力成本,時(shí)間成本。開展電纜單相故障修復(fù)法的研究,使電纜在絕緣、電場、密封性等環(huán)節(jié)恢復(fù)到可以運(yùn)行的狀態(tài),將大幅度降低電纜的修復(fù)成本,節(jié)省材料,減少電纜的修復(fù)時(shí)間。本文對(duì)電纜單相故障修復(fù)的工藝提出了新思路和新辦法。本文通過介紹國內(nèi)外電纜在故障前后進(jìn)行修復(fù)的方法,對(duì)比其中的不足和局限性,對(duì)電纜故障后修復(fù)方法進(jìn)行探討。首先,從35kV電纜的結(jié)構(gòu)及附件類型入手,對(duì)比分析了常用電纜附件優(yōu)缺點(diǎn)及對(duì)環(huán)境的不同適應(yīng)性、常見的故障類型及引起故障的原因,初步確定了保證電纜附件安裝質(zhì)量的關(guān)鍵因素及可能威脅電纜安全運(yùn)行的隱患和缺陷。最后,將以上理論作為基礎(chǔ),綜合目前使用的附件安裝技術(shù)及材料,運(yùn)用本文提出的新方法,以2013年某35kV電纜線路終端故障修復(fù)現(xiàn)場操作工藝為藍(lán)本,提煉出適用于中壓XLPE電纜單相故障修復(fù)法,并應(yīng)用到現(xiàn)場實(shí)際中,修復(fù)后電纜的安全可靠運(yùn)行證明了此修復(fù)法的有效性和可推廣性。通過實(shí)際分析表明此方法對(duì)電纜單相故障進(jìn)行修復(fù)可以大幅提高搶修速度、減少停電時(shí)間、材料消耗和人力成本,達(dá)到“一箭多雕”的效果。
[Abstract]:With the development of society and the increasing rate of urbanization, transmission lines in urban areas are laid underground by cable widely, which can save ground space and be safer, but once the cable line breaks down, The detection and repair of cable faults are very difficult. At present, there is no monitoring method that can completely avoid the cable defect from developing into cable fault, and the accident of external force breaking the cable can not be eliminated. Therefore, once the cable fails, how to quickly repair the cable, saving repair materials, cost becomes a key issue. According to the existing technology, the cable has a single phase fault. When repairing the cable, based on the consideration of the cable three-phase insulation integrity, the fault part should be sawed off, a new section of cable should be replaced, and two sets of three-phase cable connectors should be remade. If the cable is only single phase fault, if the cable is completely replaced, it will not only consume more materials, but also install the cable joint, and excavate the joint pit will require more labor cost and time cost. The research of single-phase fault repair method of cable can restore the cable to the running condition in the links of insulation, electric field and sealing, which will greatly reduce the repair cost of cable, save the material and reduce the repair time of cable. In this paper, a new idea and method of cable single-phase fault repair are put forward. This paper introduces the methods of cable repair before and after fault at home and abroad, compares its shortcomings and limitations, and probes into the methods of repairing cable after fault. First of all, starting with the structure and accessory type of 35kV cable, the advantages and disadvantages of common cable accessories, the different adaptability to environment, the common fault types and the causes of failure are compared and analyzed. The key factors to ensure the installation quality of cable accessories and the hidden dangers and defects that may threaten the safe operation of cables are preliminarily determined. Finally, taking the above theory as the basis, synthesizing the attachment installation technology and materials used at present, using the new method proposed in this paper, taking the on-site operation technology of a 35kV cable line terminal fault repair in 2013 as the blueprint, The single-phase fault repair method for medium-voltage XLPE cable is refined and applied to the field practice. The safe and reliable operation of the repaired cable proves the effectiveness and extensibility of the repair method. Through practical analysis, it is shown that this method can greatly improve the repair speed, reduce the time of power outage, material consumption and labor cost, and achieve the effect of "one arrow and more carving".
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM75
本文編號(hào)：2374305
[Abstract]:With the development of society and the increasing rate of urbanization, transmission lines in urban areas are laid underground by cable widely, which can save ground space and be safer, but once the cable line breaks down, The detection and repair of cable faults are very difficult. At present, there is no monitoring method that can completely avoid the cable defect from developing into cable fault, and the accident of external force breaking the cable can not be eliminated. Therefore, once the cable fails, how to quickly repair the cable, saving repair materials, cost becomes a key issue. According to the existing technology, the cable has a single phase fault. When repairing the cable, based on the consideration of the cable three-phase insulation integrity, the fault part should be sawed off, a new section of cable should be replaced, and two sets of three-phase cable connectors should be remade. If the cable is only single phase fault, if the cable is completely replaced, it will not only consume more materials, but also install the cable joint, and excavate the joint pit will require more labor cost and time cost. The research of single-phase fault repair method of cable can restore the cable to the running condition in the links of insulation, electric field and sealing, which will greatly reduce the repair cost of cable, save the material and reduce the repair time of cable. In this paper, a new idea and method of cable single-phase fault repair are put forward. This paper introduces the methods of cable repair before and after fault at home and abroad, compares its shortcomings and limitations, and probes into the methods of repairing cable after fault. First of all, starting with the structure and accessory type of 35kV cable, the advantages and disadvantages of common cable accessories, the different adaptability to environment, the common fault types and the causes of failure are compared and analyzed. The key factors to ensure the installation quality of cable accessories and the hidden dangers and defects that may threaten the safe operation of cables are preliminarily determined. Finally, taking the above theory as the basis, synthesizing the attachment installation technology and materials used at present, using the new method proposed in this paper, taking the on-site operation technology of a 35kV cable line terminal fault repair in 2013 as the blueprint, The single-phase fault repair method for medium-voltage XLPE cable is refined and applied to the field practice. The safe and reliable operation of the repaired cable proves the effectiveness and extensibility of the repair method. Through practical analysis, it is shown that this method can greatly improve the repair speed, reduce the time of power outage, material consumption and labor cost, and achieve the effect of "one arrow and more carving".
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM75
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，本文編號(hào)：2374305
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