摘要
针对长距离敷设海底电缆中间无法进行交叉互联、容易导致环流过大从而引起海缆接地系统故障的问题,以110 kV湾金线海底电缆为例,研究接地方式对电缆环流和载流量的影响,分析故障情况,提出一种金属护套接地方式的改造方案,计算改造前后电缆线路的环流、感应电势和载流量,所得结果表明,改造后的方案能有效限制金属护套的感应电压和环流,显著提高海底电缆的输送电流。接地方式、位置与电缆环流和载流量有一定关联性,对电缆接地方式进行改造可有效解决环流问题,大大提高海底电缆载流量。
In allusion to the problem of grounding system fault of submarine cable caused by excessive circulation due to fail-ure in cross connection grounding for long distance laying of submarine cables, this paper takes 110 kV Wanjin submarine ca-ble for an example and studies influence of grounding mode on cable circulation and carrying capacity. On the basis of analy-zing fault of the cable, it presents a transform scheme for grounding mode of metal sheath and calculates circulation, inducedelectromotive force and carrying capacity of the cable before and after transform. The results indicate this transform schemecan effectively restrict induced voltage and circulation of the metal sheath and obviously improve transmission current of thesubmarine cable. In addition, grounding mode and position has a certain relevance with cable circulation and carrying capac-ity ,and it is able to effectively solve the problem of circulation and greatly improve carrying capacity of the submarine cableby transforming grounding mode of the cable.
出处
《广东电力》
2017年第8期122-127,共6页
Guangdong Electric Power
关键词
海底电缆
接地方式
电缆环流
感应电势
载流量
submarine cable
grounding mode
cable circulation
induced electromotive force
carrying capacity
