Adding nano-AIN ceramic particles with high thermal conductivity into basic insulating oil of transformer can improve the oil’ s thermal conductivity

however

the electrical performance of the transformer decreases with the thermal conductivity.This research selected proper additive concentration to significantly increase the thermal conductivity of the oil without reducing the electrical performance of the equipment.An application scheme was proposed.The transformer with the nano-AIN particles in insulating oil was tested in power network to understand its operation status in the conditions of natural load

low load

and over-load.The effects of the nano-additive on the steady-state temperature rise and short-time temperature rise of the transformer were analyzed comparatively.It was found that addition of the nano-particles could strengthen the heat conduction and improve the heat dissipation in transformer

and the decreasing amplitude of steady-state temperature rise in low load condition of the transformer was smaller than that of short-time temperature rise in over-load condition.