Ma Guo-Ming, Li Ya-Bo, Mao Nai-Qiang, Shi Cheng, Zhang Bo, Li Cheng-Rong
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China.
Henan Electric Power Research Institute, State Grid, Zhengzhou 450000, China.
Sensors (Basel). 2018 Jan 26;18(2):365. doi: 10.3390/s18020365.
Galloping of overhead transmission lines (OHTLs) may induce conductor breakage and tower collapse, and there is no effective method for long distance distribution on-line galloping monitoring. To overcome the drawbacks of the conventional galloping monitoring systems, such as sensitivity to electromagnetic interference, the need for onsite power, and short lifetimes, a novel optical remote passive measuring system is proposed in the paper. Firstly, to solve the hysteresis and eccentric load problem in tension sensing, and to extent the dynamic response range, an 'S' type elastic element structure with flanges was proposed. Then, a tension experiment was carried out to demonstrate the dynamic response characteristics. Moreover, the designed tension sensor was stretched continuously for 30 min to observe its long time stability. Last but not the least, the sensor was mounted on a 70 m conductor model, and the conductor was oscillated at different frequencies to investigate the dynamic performance of the sensor. The experimental results demonstrate the sensor is suitable for the OHTL galloping detection. Compared with the conventional sensors for OHTL monitoring, the system has many advantages, such as easy installation, no flashover risk, distribution monitoring, better bandwidth, improved accuracy and higher reliability.
架空输电线路（OHTL）舞动可能会导致导线断裂和杆塔倒塌，目前尚无有效的长距离分布式在线舞动监测方法。为克服传统舞动监测系统对电磁干扰敏感、需要现场供电以及寿命短等缺点，本文提出了一种新型光学远程无源测量系统。首先，为解决拉力传感中的滞后和偏心负载问题，并扩展动态响应范围，提出了一种带法兰的“S”型弹性元件结构。然后，进行了拉力实验以验证其动态响应特性。此外，将设计的拉力传感器连续拉伸30分钟以观察其长时间稳定性。最后，将传感器安装在70米的导线模型上，使导线以不同频率振动，以研究传感器的动态性能。实验结果表明该传感器适用于架空输电线路舞动检测。与传统的架空输电线路监测传感器相比，该系统具有许多优点，如安装简便、无闪络风险、分布式监测、带宽更好、精度提高和可靠性更高。
