Distribution transformer hot-spot temperature monitoring and early warning method and device considering temperature coupling between windings, terminal equipment and computer readable storage medium

The invention discloses a distribution transformer hot-spot temperature monitoring and early warning method and device considering temperature coupling between windings, terminal equipment and a computer readable storage medium. The method comprises the following steps: acquiring basic parameters of a transformer; constructing a heat flow differential equation considering temperature coupling between the windings according to the basic parameters; calculating loss, heat capacity and heat resistance of the transformer assembly during unbalanced load operation according to the basic parameters; wherein the thermal resistance comprises a temperature coupling thermal resistance between the A-phase winding and the B-phase winding, and a temperature coupling thermal resistance between the B-phase winding and the C-phase winding; substituting the loss, the heat capacity and the heat resistance of the transformer assembly into the heat flow differential equation, and calculating to obtain the steady-state hot-spot te