Reductions in electricity losses in the distribution power system in case of the mass use of compact fluorescent lamps

The paper presents a method for the evaluation of the reductions in the technical and non-technical distribution losses in case of the mass use of compact fluorescent lamps (CFLs) in buildings in Serbia. The evaluation was based on an assumption that the two most used incandescent lamps in each of the 25-50% of the total number of dwellings in Serbia will be replaced with adequate CFLs, and that the same total number of lamps will be replaced in residential and non-residential sectors. A general methodology for the hourly estimation of the distribution loss reduction in case of reduced electricity consumption, based on the statistical processing of available data and on an integral (macroscopic) approach, is presented and used in the calculations. Such a methodology is appropriate because the electricity cost rate in the region changes on an hourly basis, being highest during hours when peaks of both the power demand and the decrease of distribution power losses occur. The paper illustrates that considerable reductions in both the technical and non-technical losses in the Serbian distribution power system can be achieved by applying energy efficient light sources.