光纤传感器在预装式变电站绕组热点温度监测中的应用

Application of fiber optic sensor in the winding hot spot temperature monitoring of the prefabricated substation windings

针对目前预装式变电站变压器室内部绕组热点温度在线监测困难的问题,提出了一种光纤传感应用方案,通过在变压器内布置光纤温度传感器,可以对变压器的热点温度进行监测,同时结合变压器负载情况对变压器的寿命损失进行评估。额定负载和过负载试验数据表明,该光纤在线监测系统能够准确、及时捕捉到变压器的热点温度,并给出过负载工况下的合理建议。

For the difficult problem of winding hot spot temperature on-line monitoring in prefabricated substation,this paper proposes an application scheme of optical fiber sensing,which fiber optic temperature sensors are installed in transformer to monitor the hot spot temperature. Meanwhile,The effect of transformer load on the life loss of transformers is also evaluated in this paper. The data of rated load test and the overload test of transformer are indicated that the optical fiber on-line monitoring system can accurately real-capture the hot spot temperature of the transformer in realtime,and the reasonable suggestion of the load condition is given.