GIS内触头过热的无线感知系统研制OA北大核心CSTPCD

For achieving the wireless sensing of contact temperature in GIS at 72.5 kV and above,the design idea of a set of wireless sensing system for contact temperature in GIS is described and developed in this paper.The ef-fectiveness and feasibility of the system are verified through functional test.Finally,a working condition model of 252 kV GIS angle disconnector with good and weak contact is set up,and a series of local overheating wireless sens-ing tests are performed.The reliability of the system is verified by comparing the test data with the thermocouple test data.The test result shows that the system can achieve the wireless sensing of GIS internal contact tempera-ture;When the contact resistance Rj＞250 μΩ,the temperature of moving contact and fixed contact base rises rap-idly;When Rj reaches 620 μΩ and the load current is 600 A,the temperature of the fixed contact base is close to 50℃,which can be barely detected by infrared imaging;When Rj reaches 1.8 mΩ and the load current is higher than 400 A,the contact temperature is growing all the time,which can be clearly detected by infrared imaging.