直升机巡视750 kV同塔双回交流输电线路的安全作业距离研究  

Research on Safe Patrol Distance of Helicopter to 750 kV AC Double-circuit Transmission Line on the Same Tower

作　　者：潘俊文[1] 罗日成[1] 唐祥盛 潘茜雯 邹明[1] 吴东[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410114

出　　处：《高压电器》2017年第9期130-136,142,共8页High Voltage Apparatus

基　　金：国家自然科学基金资助课题(50977003);电力与交通安全监控及节能技术教育部工程研究中心基金(2010-03)~~

摘　　要：安全距离的确定是直升机巡线时作业人员和设备安全的有效保证。文中以某750 kV同塔双回输电线路为研究对象,利用Ansoft软件建立了直升机巡线模型,计算分析了无直升机、直升机在档距中央和直升机在杆塔附近3种工况下导线或直升机周围的电场、电势分布。计算结果表明:输电线路周围空间同一位置处的电场、电势随着电角度的增大近似余弦规律变化;随着直升机—导线间距的增大,直升机周围的电场、电势呈指数规律衰减;平行线路飞行方式下,直升机在档距中央巡线的最小安全距离为23 m左右,直升机在杆塔附近巡线的最小安全距离为13 m左右。The determination of safe distance in helicopter patrol power line is the assurance for operators and stuffs. A patrolling transmission line model of helicopter is established with the software Ansoft for a 750 kV double-circuit transmission line on the same tower. The electrical fields and potential distributions near the transmission line and the helicopter are calculated with the model in three conditions, ie, no helicopter exists, the helicopter is in the middle of span, and the helicopter is near the tower. The calculation result shows that：①the electric field and potential at same location around the transmission line changes following approximate cosine law with the increase of electric angle;②with the increase in the distance between helicopter and transmission line, the electric field and potential around the helicopter attenuate exponentially; ③when the helicopter patrols in parallel with the transmission line, the minimum safe distance is about 23 m if it is in the middle of span, and the minimum safe distance becomes about 13 m if it is near the tower.

关 键 词：安全距离 直升机巡视 输电线路 750 kV同塔双回 电场 电势 

分 类 号：TM75[电气工程—电力系统及自动化]