Transport Vibration and Shock Characteristics of A 110 kV/40MVA Vehicular Mobile Transformer

Abstract

Vehicular mobile transformers will suffer from frequent vibration and shock during transportation, which may lead to the damage of transformers. In order to understand the characteristics of vibration and shock during transportation, the three‐axis vibration and shock acceleration of a 110 kV/40MVA vehicular mobile transformer was measured by using a self‐developed transportation condition monitoring system. The time‐domain characteristics and frequency‐domain characteristics were analyzed. The relationship of vibration and shock acceleration with driving speed was also discussed. Results show that the y‐axis vibration and shock acceleration is generally the lowest. The main frequency of x‐axis acceleration is 4–8 Hz, while y‐axis acceleration is 1–7 Hz and 25–28 Hz, and z‐axis acceleration is 1–5 Hz. The related scattered points of the vibration acceleration with the driving speed are approximately distributed on a straight line, and that of the shock acceleration with the driving speed are approximately distributed on an exponential function curve. According to the limitation of 3 g vibration and shock acceleration in international standards, the driving speed of the 110 kV vehicular mobile transformer in highway, highway ramp and the first class road are suggested to be limited to 66, 51, and 49 km/h, respectively. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.