The Difficulty to accurately assess the Active Losses due to Harmonics

It is known that in the same network the harmonic level increases due to the extensive use of equipment based on electronics (lighting equipment which use drivers, switching-mode power supplies, dimmers, rectifiers, electrical drive systems etc.). At a given moment it is practically impossible to estimate the number of such devices working simultaneously. For these reasons the adequate assess of active losses is a great challenge. The paper presents a method to roughly estimate the active losses in a low voltage network supply and the causes that prevent the estimation with accuracy of these losses due to dynamic behavior of consumers.