Research on Electromagnetic Interference of Arc Discharge on X-Ray Detectors

Using X-ray detectors to inspect power lines can promptly identify defects and eliminate potential hazards. However, during operation, X-ray detectors require equal potential at the input/output, which can lead to arc discharge of suspended potential conductors, creating intense electromagnetic changes that severely disrupt the normal operation of the X-ray detector. This paper analyzes the potential impacts of such arc discharge on X-ray detectors and establishes a three-dimensional model. The FDTD and TLM hybrid algorithm is used for simulation analysis of the power density inside the X-ray detector, the induced voltage in the internal and external cables under the influence of the arc discharge field, and electromagnetic compatibility assessment. Finally, the induced current in the external cables is measured, with the simulation results matching the measured results well. When X-ray detectors are applied in power line environments, the internal high-speed circuits, embedded computers, and CCDs need to be reinforced with electromagnetic protection. The induced voltage on the RJ45 connecting the inside and outside of the X-ray detector reaches 21.89V, requiring transient overvoltage suppression at the interface.