摘要
1 000 kV与500 kV交流同塔四回输电线路与单一电压等级超(特)高压线路的空间电场分布具有较大区别,线路带电作业电场环境更为复杂。为此,采用工频电场的三维边界元法仿真计算分析同塔四回线路带电作业场强分布特点,建立人体模型,计算分析等电位和地电位典型作业工况下人体不同部位的电场强度特点,进而确定该特殊塔形线路带电作业人员安全防护措施。结果表明,等电位作业人员需身穿屏蔽效率为60dB的屏蔽服,并佩戴屏蔽效率不低于20 dB的屏蔽面罩,地电位作业人员穿戴常规屏蔽服或静电防护服,能够满足作业人员安全防护的要求。
Electric field distribution of I 000 kV and 500 kV AC four-circuit lines on one tower is quite different from that of single-voltage EHV/U H V transmission lines and electric field for live-wurking becomes more complieated. The field intensity distribution for live-working is simulated in this paper with 3D boundary element method of power frequency electric field and a human body model is established for analyzing the electric field intensity of the human body in different parts in the typical operating conditions including ground potential and equipo/ential, based on which the electric field protection measures for the live-workers are detennined. It is concluded that the satbty protection requirements can be met for the equipotential workers who wear sereening clothes with 60 dB sereen efficiency and screening hehnet with 20 dB screen efficiency, and for the ground potential workers who wear conventional screening clothes or electrostatic shiehling clothes.
出处
《中国电力》
CSCD
北大核心
2014年第2期78-83,共6页
Electric Power
关键词
带电作业
同塔四回
交流线路
电场防护
仿真
live-working
four-circuit on one tower
AC transmission line
electric field protection
simulation
