超高压交流输电线酒杯型塔塔窗内部磁场测量与仿真  

Magnetic Field Measurement and Simulation in the Tower Window of Cup-Tower of Extra-high Voltage AC Transmission Line

作　　者：唐波[1] 朱建雄[1] 方书博[2] 张弓达[2] 张瑞[2] 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]国网电力科学研究院,湖北武汉430074

出　　处：《中国电力》2014年第11期59-63,共5页Electric Power

摘　　要：目前,超高压交流输电线路使用较多的是酒杯型塔,运行线路空间磁场强度沿酒杯型塔不同位置分布水平不同。随着超高压线路带电作业的开展,对登塔带电作业人员的安全防护提出了较高要求。由于铁磁性材料对磁场分布具有一定的畸变作用,为了明确铁塔内磁场分布水平,确认工作人员在塔窗内工作时受磁场强度影响情况,测量了500 kV交流线路酒杯型塔典型位置点的磁场强度,并仿真计算了测量点处沿铁塔表面的磁场分布水平,测量与计算结果具有较好的一致性。计算与实测结果表明:酒杯型塔塔窗内磁场分布水平远小于国际非电离辐射防护委员会推荐的工频磁场职业暴露值,不会对带电作业人员健康产生影响,带电作业人员在进行500 kV交流线路带电作业时无需对磁场采取防护措施。Currently, cup-tower is the main support structure for extra-high voltage AC transmission lines. Magnetic intensity varies in different locations along the tower window for the running lines. With the development of live working in extra-high voltage AC transmission lines, higher request is put forward for the operator with live working in tower. As ferromagnetic material may distort the distribution of magnetic intensity, in order to identify the magnetic field level around the tower and understand the influence of magnetic intensity on the workers working in tower window, the magnetic intensity of several typical points in the cup-tower’s window of a 500 kV AC line is measured and a similation of the distribution level of magnetic intensity at the same points is conducted. The results show that measured values are well coincided to the simulation results, and the level of distribution of magnetic intensity is far less than the occupational exposed value proposed by ICNIRP. So there is no need to take protective measures against the magnetic field during live working on 500 kV AC transmission lines.

关 键 词：酒杯型塔 超高压线路 空间磁场 带电作业 安全防护 铁磁性材料 磁场分布 

分 类 号：TM75[电气工程—电力系统及自动化]