Li Cai

Parameter determination method for model of ZnO varistors based on dynamic V-I characteristics

This study investigates the dynamic volt-ampere characteristics and residual voltage responses of ZnO varistor of five different sizes under various impulse waveforms, including 8/20 μs lightning current, 30/80 μs operating wave, 1/5 μs steep wave, and 2 ms square wave impulses....

Seasonal Reversal of Polarity Dominance in High‐Current Cloud‐to‐Ground Return Strokes Over East Asian Midlatitudes

Abstract Extreme positive cloud‐to‐ground lightning over East Asian midlatitudes exhibits a spring–autumn double maximum hidden by the familiar winter climatology. Using 1,838,538 return strokes with absolute peak currents at least 200 kA during 2006–2024, we resolve its annual c...