Smart Meter Data-based Three-Stage Algorithm to Calculate Power and Energy Losses in Low Voltage Distribution Networks

In the paper, an improved smart meter data-based three-stage algorithm to calculate the power/energy losses in the three-phase low voltage (LV) distribution networks was proposed. In the first stage, an loading procedure of input data was built, being able to work simultaneously with files containing the active and reactive power profiles provided by smart meters and typical profiles associated to consumers without smart meters, based on the energy consumption categories, day type (weekend and working), and season type, knowing the daily energy indexes, in the second stage, a structure vectors-based algorithm was implemented to recognize the network topology, and in the third stage, an improved version of forward/backward sweep-based algorithm was proposed to calculate fast the power/energy losses to three-phase LV distribution networks in balanced and unbalanced regime. A real LV rural distribution network from a pilot zone belonging to a Distribution Network Operator (DNO) from Romania was used to verify the accuracy of the proposed algorithm. The results were compared with those obtained using the DigSilent PowerFactory Professional Software, the MAPE being by 0.94%.