Distribution transformer openable capacity calculation method

The invention belongs to the technical field of power distribution network distribution transformer analysis, and particularly relates to a distribution transformer openable capacity calculation method, which comprises the following steps: S1, obtaining the rated capacity Sn of a distribution transformer, the current access user load capacity SQ and the in-transit installation capacity Sz; s2, acquiring the maximum load Sh in the last historical calculation period t under the normal operation mode of the distribution transformer, and the load Sx of the users applying for account cancellation in the last historical calculation period t; s3, calculating the openable capacity of the distribution transformer according to a formula Sk = alpha * Sn-max (Sh, gamma * SQ)-Sd + Sx-gamma * Sz; the method is suitable for calculating the openable capacity of the power distribution network transformer in different seasons; the method is especially suitable for the conditions of planning and calculating the openable capacit