摘要
35 kV线路的杆塔结构和电压等级处于配电和输电线路之间,使得带电作业人员难以选择合适的电场防护措施,为确保35 kV线路带电作业的安全开展,采用有限元法仿真计算了35 kV单、双回线路杆塔、导线表面及地电位、等电位人员体表的电场分布情况,依据人体体表电场特性和允许暴露电场的限值,提出了相应的人员防护要求。计算结果表明,作业人员在35 kV单回和双回线路直线杆上按照4种典型工况进行作业时,作业人员在作业位置处体表的电场强度均在限值以内,满足标准要求,不用穿戴带电作业屏蔽服装。研究成果为指导35 kV线路带电作业的安全开展提供了技术依据。
The tower structure and voltage level of 35 kV line are between distribution line and transmission line,which makes it difficult for live operators to choose appropriate electric field protection measures.In order to ensure the safety of live-line working on 35 kV lines,the spatial electric field distribution of 35 kV single circuit and double circuit towers and the electric field intensity of live line operators at different working positions are simulated and calculated by finite element method,and the electric field intensity on the surface of live-line operators at different working positions is analyzed.The distribution characteristics and change rules of electric field on the human body surface of the operators,and the corresponding personnel protection requirements are put forward.The calculation results show that the electric field intensity on the human body surface at the working position is within the limit value when the workers are working on the 35 kV single circuit and double circuit line poles under four typical working conditions,which meets the standard requirements and does not need to wear the live working shielding clothing.The research results provide a technical basis for guiding the safe development of live line operation of 35 kV lines.
作者
王磊
唐盼
杨芳
谢龙光
WANG Lei;TANG Pan;YANG Fang;XIE Longguang(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510600,China;State Key Laboratory of Power Grid Environmental Protection,Wuhan Branch of China Electric Power Research Institute,Wuhan 430074,China;Qingyuan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Qingyuan,Guangdong 511538,China)
出处
《南方电网技术》
CSCD
北大核心
2021年第3期92-98,112,共8页
Southern Power System Technology
基金
广东电网有限责任公司科技项目资助(GDKJXM20182414(036500KK52180004))。
关键词
35
kV
带电作业
电场防护
仿真计算
35 kV
live working
electric field protection
simulation calculation
