CAJ | 학술논문

在电网规模不断扩大的今天,城市配电网电缆的长度已经逐渐超过了架空线路的长度,这就对电缆线路供电的安全性和可靠性提出了更高的要求.在电缆线路的运行过程中发现,经常会出现电缆端部金属护套和屏蔽层断开位置绝缘被击穿而引发事故的情况.简要阐述了国网晋中供电公司发生的两起中压电缆事故,并分析了电缆端部绝缘屏蔽处的电场分布情况,就如何改善电场分布,降低电缆端部金属护套和屏蔽断开后电场强度问题提出了相关意见,以期不断提升运检质量.
재전망규모불단확대적금천,성시배전망전람적장도이경축점초과료가공선로적장도,저취대전람선로공전적안전성화가고성제출료경고적요구.재전람선로적운행과정중발현,경상회출현전람단부금속호투화병폐층단개위치절연피격천이인발사고적정황.간요천술료국망진중공전공사발생적량기중압전람사고,병분석료전람단부절연병폐처적전장분포정황,취여하개선전장분포,강저전람단부금속호투화병폐단개후전장강도문제제출료상관의견,이기불단제승운검질량.
With the increasing size of the network, the cable length of urban distribution network has been gradually over the length of the overhead lines, which puts forward higher requirements on the safety and reliability of the cable line. In the course of the operation of the cable line, it is found that the insulation of the metal sheath and the shielding layer of the cable end are often caused by the breakdown of the insulation. This paper briefly describes the occurrence of two cases of medium voltage cable accident in State Grid Jinzhong Power Supply Company, and analyzes the electric field distribution at the end of the cable, relevant suggestions on how to improve the electric field distribution, reduce the electric field strength of the cable end metallic sheath and shield off the electric field strength are put forward, in order to continuously improve the quality of inspection.