基于光纤传感的输电线路悬垂绝缘子风偏角监测研究

由风偏引起的输电线路故障在电网运行中占有很大的比例,为了实时监测输电线路绝缘悬垂绝缘子串风偏角的变化,通过研究悬垂绝缘子风偏的荷载模型,应用光纤传感技术,搭建悬垂绝缘子风偏角在线检测系统,实现了云南电网昭通地区某110 kV杆塔悬垂绝缘子串风偏角的在线监测。由监测数据可得,悬垂绝缘子串风偏角的变化与理论计算模型的变化趋势相符,变化范围大致在-4°～+4°。结果表明,该光纤传感的风偏角在线检测方法在实际运用过程中准确可靠,为输电线路安全运行提供了一定程度的参考。

Monitoring of wind deflection angle of suspension insulator string for power lines based on optical fiber sensing

Transmission line faults caused by wind deviation account for a large proportion in power grid operation. In order to monitor the change of the yaw angle of the insulated suspension insulators in real time, the fiber optic sensing technology is applied by studying the load model of the overhang insulator wind bias. The on line detection system for the wind deflector of the suspended insulator was built, and the online monitoring of the skew angle of the 110 kV pole suspension insulator in the Zhaotong area of Yunnan Power Grid was realized. According to the monitoring data, the change of the yaw angle of the suspended insulator string is consistent with the trend of the theoretical calculation model, and the variation range is roughly between -4° and +4°. The results show that the on line detection method of wind sounding angle of optical fiber sensing is accurate and reliable in practical application, which provides a certain reference for the safe operation of transmission lines.