Engineering & Technologies, 2017, 10(1), 6-16 ~ ~ ~ УДК 621.316.11.001 The Combined Presentation of Deterministic and Stochastic Approaches in the Algorithm of Calculation of Energy Losses in Electric Networks Alexey A. Gerasimenko* and Evgeny V. Puzyrev Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia Received 01.12.2016, received in revised form 09.01.2017, accepted 30.01.2017 A brief description of deterministic and probabilistic-statistical methods for calculation of electricity losses in the distribution networks of 6–35 kW. The optimal combination of weight deterministic and probabilistic and statistical approaches in the combined calculation of power losses by criterion of a minimum of errors. <...> Citation: Gerasimenko A.A., Puzyrev E.V. The combined presentation of deterministic and stochastic approaches in the algorithm of calculation of energy losses in electric networks, J. Sib. <...> All rights reserved * Corresponding author E-mail address: jane2387@mail.ru # 6 # Alexey A. Gerasimenko and Evgeny V. Puzyrev. <...> Introduction Application of the principles of the combined association of deterministic and stochastic methods became a defi ning trend for constructing algorithms for calculating power loss with high precision and the desired confi dence level [1-3]. <...> Determination of power losses with high reliability (accuracy and reliability) it is necessary to solve a number of problems of operation, reconstruction and optimization of power distribution networks. <...> Electricity losses – the value of monthly reporting as a measure of evaluating the quality of performance and the technical condition of networks, the basis of justifi cation of tariffs for electricity and valuation losses. <...> Combined approach in the determination of power losses The most effective and common methods of calculating power losses are based on the use of averages (mathematical expectations) load, defi ned capacity: P or currents I aver P Qaver 3U 2 aver 2 U T W W P 2 3 2 Q . (2) The last in the map any workload at any arbitrary point in time are the most accurate and reliable integrated parameters of electric modes, taking into account compact point the whole set of modes (multimode) for a given time interval T. For circuit electrical distribution system with m longitudinal sections of the load losses of electricity in general are determined by the exact summation (direct integration) of active power losses <...>