CAJ | 학술논문

为确定我国西北海拔3000~5000 m地区750 kV输电线路带电作业所需的安全距离，首先对低海拔地区750 kV单回酒杯塔和同塔双回输电线路带电作业的试验数据进行对比，结果表明可将两种不同塔型统一至同一塔型下进行分析；然后采用常用海拔校正方法和海拔0 m及4300 m地区750 kV塔头空气间隙放电电压的试验数据，得到海拔1000~5000 m地区的海拔校正系数，并计算海拔1000~5000 m地区典型作业位置所需的安全距离和组合间隙距离。通过与现有标准对比分析，推荐海拔3000~5000 m地区典型作业位置所需的最小安全距离，最小组合间隙距离。研究结果为海拔3000 m以上地区750 kV输电线路带电作业的开展提供技术依据。
위학정아국서북해발3000~5000 m지구750 kV수전선로대전작업소수적안전거리，수선대저해발지구750 kV단회주배탑화동탑쌍회수전선로대전작업적시험수거진행대비，결과표명가장량충불동탑형통일지동일탑형하진행분석；연후채용상용해발교정방법화해발0 m급4300 m지구750 kV탑두공기간극방전전압적시험수거，득도해발1000~5000 m지구적해발교정계수，병계산해발1000~5000 m지구전형작업위치소수적안전거리화조합간극거리。통과여현유표준대비분석，추천해발3000~5000 m지구전형작업위치소수적최소안전거리，최소조합간극거리。연구결과위해발3000 m이상지구750 kV수전선로대전작업적개전제공기술의거。
In order to determine the required safety distance for live working on 750 kV transmission lines in regions at altitudes of 3 000~5 000 m in northwest China, first of all, test data of live working on 750 kV single-circuit cupulate-type tower and 750 kV one-tower double-circuit transmission line in areas at low altitudes are compared, and the results show that the two different towers can be unified into a same tower type;then by using the conventional altitude correction methods and the test data of 750 kV tower head air-gap discharge voltage in areas at the altitudes of 0 m and 4 300 m, the altitude correction factors of regions at altitudes of 1 000~5 000 m are obtained;in addition, the required safety distances and combined gap distances of the typical operating positions in regions at altitudes of 1 000~5 000 m are calculated. By comparing with the existing standard, the required minimum safety distances and minimum combined gap distances of the typical operating positions in regions at altitudes of 3 000~5 000 m are recommended. The results could provide technical basis for live working on 750 kV transmission line in areas with altitude over 3 000 m.