In the process of overhead line temperature monitoring,due to the influence of environmental temperature,sunshine and other factors,the monitoring data is distorted and the monitoring accuracy is reduced.A temperature monitoring method for overhead line con-ductor based on optical fiber sensor is proposed.The steady-state heat capacity balance model of overhead line conductor is established,and the factors affecting conductor temperature are analyzed.The response coefficient of thermal expansion is obtained through the fiber temperature sensor,the sensitivity coefficient of fiber Bragg grating to temperature change is calculated,and the sensing steady-state thermal balance equation is constructed.Combined with the parameters such as ambient temperature,wind speed and sunlight radiation,the thermal resistance of each part of the sensing conductor is calculated by using the conductor temperature rise formula,and the corre-sponding temperature monitoring data are obtained to realize the overhead line conductor temperature monitoring.The experimental re-sults show that,without affecting the normal operation of the line,the temperatures of the upper surface,the side orientation and the low-er surface of the conductor measured by using the proposed method are 27.8℃,26.6℃and 23.4℃respectively.The temperature mo-nitoring is accurate and the error is small.
关键词
光纤传感器/架空线路监测/导线温度检测/光纤光栅/线路结构
Key words
optical fiber sensor/overhead line monitoring/conductor temperature detection/fiber bragg grating/line structure
维普
万方数据