The analysis on inner winding stability of power transformer after initial short-circuit and reclosing under short-circuit fault

Due to inclement weather in recent years, the short-circuit fault cannot be ruled out in a short time on power system, and this make the transformer as the main components of the system will withstand the impact of two consecutive short-circuit current in a short time, which makes the winding disks in the initial short circuit without damage, its residual deformation and vibration situation can meet the requirements of stability of transformer. But with the impact effect of the second short circuit, the coil disks residual deformation and vibration amplitude has increased in order to destroy the coil insulation eventually to make the instability phenomenon occurred as a result the transformer has been damaged. So it is necessary to study coils stability after reclosing occurred in power transformer.