10kV和110kV混压并架线路检修作业安全防护研究

Security Research on Maintenance Operation of 10 kV and 110 kV Mixed-Voltage Transmission Lines on the Same Tower

10 kV和110 kV混压并架输电线路可以有效地集约土地资源,充分利用线路走廊。在检修10 kV配电线路时,由于输电线路间的静电耦合和电磁耦合作用,在检修回路中产生的感应电压和感应电流,可能危及正在检修的作业人员安全,同时混压并架线路附近的综合电场也可能对带电作业人员带来不利影响。采用ATP-EMTP方法计算混压线路检修作业过程中可能产生的感应电压、电流,采用有限元电场计算与电场实测的方法研究混压线路空间电场分布和作业人员体表电场分布规律,在此基础上提出了10 kV和110 kV混压并架输电线路检修作业安全防护方法。

Mixed 10 kV and 110 kV transmission lines on the same tower can save land resources effectively and make full use of the line corridor.When the 10 kV distribution line is for maintenance,induced voltage and current will occur on the examining line duo to electrostatic and electromagnetic coupling,which may cause harm to the maintenance workers.Furthermore,the synthesis electric field from the mixed transmission lines may also adversely affect the live workers.The ATP-EMTP is used in this paper to calculate the induced voltage and current during maintenance of the 10 kV lines.Both the ANSYS and electric field measurement are used to study the spatial electric field distribution of the mixed lines and the body surface electric field distribution of workers,based on which the security protection method is proposed for maintenance of the mixed 10 kV and 110 kV transmission lines.