Propagation Characteristics of 10kV Cable Breakdown Vibration in Sand

This paper studies the propagation attenuation characteristics of buried 10 kV XLPE cables breakdown vibration in sand. The negative power exponential decay formula that affects the amplitude of breakdown vibration wave is deduced based on dimensional analysis theory. The mass-spring-damping system model is used to equivalently propagate the attenuation characteristics of breakdown vibration waves in sand, and to deduce the exponential decay formula. Fitting the experimental data with the power exponentiation decay formula and the exponential decay formula, we can get the power exponentiation coefficient β=1. 349, and exponential decay coefficient α=0. 07040.