Research On The Electromagnetic Compatibility Of Wireless Sensor Temperature Unit Of The Internet Of Things In Substation

In recent years, with the rapid development of the sensor technology, communication technology and network technology, the application of the wireless sensor unit of the internet of things in substation will become the future development trend. The wireless sensor unit has the advantages of reliable operation, flexible installation, low cost and so on. If the wireless sensor unit is applied to the state monitoring of power equipment in substation, it will improve the performance of the measure and control system in substation. In addition, the wireless sensor unit can compensate for the inadequacies of the wired communications in substation. However, the electromagnetic environment of the substation is quite bad, and the electromagnetic compatibility issues of the wireless sensor unit in such bad electromagnetic environment need to be resolved. Therefore, research on the electromagnetic compatibility of the wireless sensor unit in substation is of great significance. In this paper, the CST simulation software and the finite integration theory were firstly introduced, and typical electromagnetic interference sources in the substation area were analyzed and summarized, and detailed analysis of the electromagnetic coupling mechanism of the wireless sensor unit under the action of space electromagnetic field was also carried out. In the second part, the CST simulation software was used in simulation for wireless temperature sensor unit models with non-shielded shell and shielded shell respectively. The wireless temperature sensor unit model was irradiated by plane wave irradiation with different irradiation directions and different electric field polarization directions, so the induced voltage would be produced in the signal circuit and the antenna in the model. The distribution of magnetic field and surface current flow in the model were also obtained in this paper. In the third part, the immunity test for wireless temperature sensor unit was carried out in the anechoic chamber, open field, partial discharge test field and substation site respectively. The experimental measurement results were the basis for determining the immunity level for wireless sensor unit of the internet of things, and they were of important reference value for the application of wireless sensor unit in substation.