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A new method for energy loss reduction for distribution networks is presented. It is based on known techniques and algorithms for radial network analysis - oriented element ordering, power summation method for power flow, statistical representation of load variations, and a recently developed energy summation method for computation of energy losses. These methods, combined with the heuristic rules developed to lead the iterative process, make the energy loss minimization method effective, robust and fast. It presents an alternative to the power minimization methods for operation and planning purposes. Keywords: Daily load curve, Energy losses, Energy loss reduction, Energy summation, Oriented ordering, Power losses, Power loss reduction, Power summation, Radial network, Reconfiguration.

A method for energy loss calculation in radial distribution networks is presented. It is based on the statistical representation of the influence of different load curves in the network upon element power flows and on the oriented ordering of the network elements. Also, the paper proposes the use of different, but constant, voltages at each node, instead of nominal voltage at all nodes. The procedure is very simple, and it involves four steps: element ordering, calculation of second moments, power flow calculation with average loads at nodes, and energy loss calculation in network elements. The presented results illustrate that the algorithm has advantages over methods that use nominal voltage at each node for accuracy, and advantages over methods that calculate accurate energy losses for speed. Keywords: Daily load curve, Energy losses, Energy summation, Oriented ordering, Power losses, Power summation, Radial network.