Transient Signal Identification Methods and Applications in Lightning Current Online Monitoring Systems

Accurately and timely triggering and storing lightning current signals are crucial for lightning current monitoring systems in transmission lines. In light of the current issues of false triggering and failure to trigger in existing systems, this paper presents a FPGA-based online monitoring system for lightning currents. This system enables real-time monitoring of lightning strikes on transmission lines, greatly enhancing the convenience and cost-effectiveness of monitoring. Furthermore, a hardware-triggering and wavelet-based multi-scale amplitude method is proposed for reliable triggering of lightning currents. Experimental results validate that this method significantly reduces false triggering and missed detection of lightning currents by the monitoring system.