输电线路绝缘子表面盐密在线监测系统

摘要

In order to have a real-time monitoring of the heavy contamination on the surfaces of insulators in high voltage overhead wire ,a system based on distributed fiber optical is pro-posed .According to the analogy method ,the fiber optical cable is put into the same environ-ment with the insulators ,so that the salt density in the optical cable can be regarded as that in insulators .Firstly ,the loss of optical power during transmission is measured ,and then such measurable values as the loss of optical power ,air humidity and surrounding temperature are a-dopted as inputs of successfully trained neural network to calculate the salt density .Experi-mental data proves the effectiveness and the measurement accuracy of the designed system .%为实时监测电力系统高压架空线路中绝缘子污秽的状况，文中设计了一种基于光纤的绝缘子表面盐密分布式在线监测系统。使用类比的方法，将裸光纤置于与绝缘子相同的环境中以便使光纤上的盐密值代表绝缘子的盐密水平。首先测量光在光纤传播过程中的光功率损耗值，然后将光损值、大气湿度、环境温度等可测值作为已训练成功的人工神经网络模型的输入值而求出盐密值。试验数据验证了该系统的可行性与测量的准确性。