With the rapid development of China's comprehensive national strength, as one of the symbols of comprehensive national strength of the development of electric power system is becoming more and more demanding, especially for the system security and stability. But in the actual production of life there will be many events affect the normal operation of power system, serious condition can lead to large area power outage of power grid, this kind of situation will not only make the grid customers affected, even more crucial is also will increase the workload of the power supply department, influence the development of economy increase social instability. According to the above problem, this paper puts forward a new kind of power transmission line monitoring system, it is based on the distributed structure design, tower in the grid system is used as the carrier, in the tower on testing equipment, realize the actual running situation of line monitoring, detecting and early warning system including the stand and module power supply unit. Later with the expansion of power grid, we can make use of the existing software and hardware platform according to the actual situation on the need to expand the range of detection and warning. System design in this paper through field test for a long time, shows that this system has high stability and reliability, can provide the safe operation of transmission lines with reliable early warning mechanism.%在实际的生活生产中会有许多事件对电力系统的正常运作产生影响，严重的情况可能会导致大面积电网的供电中断。针对上述问题，文中提出了一种新的电力传输线路监控系统，它是基于分布式结构设计的，利用电网系统中的杆塔作为载体，在杆塔上搭载检测设备，实现对线路实际运行情况的监测，检测和预警系统包括子站和模块供电单元。后期随着电网规模的扩大，可以根据实际情况利用已有的软硬件平台对需要检测和预警的范围进行扩展。本文设计的系统经过现场长期测试，验证了该系统具有较高的稳定性和可靠性，可以为输电线路的安全运行提供可靠的预警机制。
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