Study on Pulsed Electromagnetic Sensitivity of Typical Power IoT Device Nodes

The sensing capability of power Internet of Things (IoT) systems highly relies on the data accuracy of perception-layer devices. However, such devices are prone to malfunctions during operation due to electromagnetic interference. To address this critical issue affecting the safe operation of the system, this paper presents a system-level electromagnetic sensitivity experimental study on typical device nodes. A repeatable conducted injection test platform is built, and more than 30 groups of representative pulse disturbance excitations are designed. Statistical analysis is carried out on the anomaly rate of sensor sampling data, communication interruption duration, and system recovery characteristics. Experimental results demonstrate that different excitation forms have obvious sensitive threshold intervals. The findings provide experimental support for the electromagnetic protection design and security assessment of power IoT terminals.