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The difference between registered active power and spent unregistered power   represents the losses at power grid. This paper treats problems related to   losses caused by nonlinear loads connected to the power grid. In recent years   the load profile of power consumers turned from energy-waster linear to   energysaver but non-linear loads. The main cause of the losses appears due to   the lack of adequate measurement equipment. Namely, common household power   meters register only active energy, while power meters for industrial   application register reactive energy as well. This approach does not follow   the change of the enduser profile. Tendency of improving energy efficiency   brought wide use of switching mode regulators and replace old incandescent   light bulb with new energy saving lamps (CFL - compact fluorescent lamp, LED   bulb). Therefore, the number of non-linear load drastically increased.   Registering only active component of power at consumer’s side does not depict   the real profile of the consumption. Therefore, in this paper we analyse and   quantify the effects of nonlinear loads at power losses. As a result we   suggest an efficient method for measuring the distortion component of power.   The method relays on low-cost upgrade of commercial electronic power meters.   The presented results of measurements on small non-linear loads confirm the   proposed technique. Besides, they prove the importance of measuring all   components of apparent power and justified their use in billing policy. The   implemented set-up is based on power meter manufactured by EWG of Niš.   [Projekat Ministarstva nauke Republike Srbije, br. TR32004

The losses at power grid caused by small nonlinear loads