model recognition;  Real-time line loss calculation;  load ratio;  Copper and iron loss

Aiming at the low accuracy and insufficient response lag of the traditional statistical theoretical line loss calculation method of distribution network, a method of real-time theoretical line loss calculation using real-time telemetry data stored every 5 minutes is introduced, and the model recognition technology is adopted for the model parameters during the implementation process. The practical application shows that this method can better estimate the operating state of the line or transformer on the line, so that the deviation of the calculation result is smaller and closer to the actual line loss rate.