A method for calculating the average temperature rise value of a transformer winding

The invention discloses a method for calculating the average temperature rise value of a transformer winding. The method comprises the following steps of calculating the average temperature rise valueof the winding according to a formula delta T = 0.0051 x + 1.548*10-5*x2-1.97223, wherein delta T is set to be the winding average temperature rise value, and x is set to be a calculation intermediate value according to the formula, b is set as a CT value of the current transformer; e is set to be a real-time current value collected by a current transformer, a is set as the average temperature rise value ty of the winding pair oil, c is set to be a transformer high-voltage phase rated current and c = d*b, d is set to be a secondary rated current value Ip. According to the present invention, the winding average temperature rise value is directly obtained through the direct digital calculation of variable parameters, the simulation parameters are not used as the calculation basis any more,so that the winding averag