Losses modelling for distribution networks

The paper describes total (technical and non-technical) losses modelling for distribution networks operated by EDF in Metropolitan France. The model is based on a trinomial formula given by a regression linking the power flow at the substations level with the load at low voltage (LV) and medium voltage (MV) levels. Due to its time depending behaviour, the model allows: — market operators to complete the settlement process — distribution network operators to compensate the losses by purchasing them using the market mechanisms. The calculation is done in two stages: • Evaluation of the load diagram of the technical losses and non-technical for one year under review; • Establishment of a general law allowing a direct calculation of the load diagram of the losses starting from the load diagram of consumption. The calculation of the profile of the technical losses is made by stacking the curves calculated on the various voltage levels: • Substations (EHV/MV and HV/MV); • MV network; • MV/LV transformers • LV network.