绝缘子温湿度在线监测技术研究

Research on online monitoring technology for temperature and humidity of insulator

为降低绝缘子发生污闪的概率,需对影响绝缘子泄漏电流的温湿度值进行在线监测。为克服现有的在线监测温湿度技术在高环境温度和强电磁干扰等各种恶劣的环境下可靠性低的不足,采用了一种新的基于声表面波射频识别(SAWRFID)的绝缘子温湿度在线监测方法。首先对该SAW-RFID温湿度传感器标签芯片进行了通信测试、中心频率测试和性能测试,并基于该温湿度传感器对XP-70型绝缘子进行了实验,利用SAW-RFID温湿度传感器标签监测绝缘子温湿度,在此基础上分析得到了环境温湿度与绝缘子泄漏电流幅值的关系,为预估绝缘子绝缘性能提供了参考依据。

In order to reduce the flashover probability of polluted insulator, it is necessary to online monitoring the temperature and humidity which influence insulators leakage current. In order to overcome the low reliability of the existing temperature and humidity measurement technology used in harsh environments, such as high temperature, strong electromagnetic etc., a new method based on SAW-RFID （surface acoustic wave radio frequency identification） technology is used for online monitoring temperature and humidity of the insulator. Firstly, the communication test, the center frequency test and performance test for SAW-RFID tags are carried out, and then the experiments on XP-70 insulator based on the SAW-RFID tags are carried out, the temperature and humidity of the insulator is monitored by using SAW-RFID tags. And the relationship of leakage current amplitude with different temperature and humidity is analyzed, and the analysis provides important reference value for estimating the insulating properties of insulator.