Simulation Analysis of Conducted Electromagnetic Interference in Excitation Power Cabinet of Giant Hydraulic Turbine Unit Based on Time Domain Finite Integration Method

With the continuous increase of the installed capacity of clean energy and the application scale of various types of high-power power electronic equipment in China, a large number of real-time data sensors are installed in these high-power power electronic equipment to monitor the status data of various equipment such as temperature and humidity in real time and online. Among them, RFID temperature online monitoring system is widely used, but in practical work, it is often in a long-term failure state due to conducted electromagnetic interference generated by high-power power electronic equipment. Therefore, in order to study the conducted electromagnetic interference generated by high-power power electronic equipment, this paper establishes a simulation model, extracts the parasitic capacitance in the conducted electromagnetic interference of high-power power electronic equipment by using the time-domain finite integration method, analyzes the influence of the parasitic capacitance on the RFID tag antenna, and compares the difference between the S11 parameter curve of RFID tag antenna before and after simulation, It is confirmed that the conducted electromagnetic interference generated by high-power power electronic equipment has a negative impact on the performance of RFID temperature online monitoring system and other sensors.