Abstract
The article presents calculations the additional electric loss in the case of three-phase voltage system unbalance in the real rural electrical distribution networks (0.38 kV). Measurements were carried out at substations that receive power from distribution substation “Petropavlovsk”. Measurements were carried out using a certified device “Resource-UF2M”. Also presented are graphs of changes in currents/voltages of the negative-sequence and zero-sequence, electric loss and other parameters. The results of the economic assessment of electricity losses are presented. As a result, the proposed method for reducing the power loss factor, that can reduce the losses of electricity.
Highlights
Rural electrical distribution networks (0.38 kV) are characterized by an unbalance distribution of phase currents in a three-phase system
Voltage unbalanced function is minimized as an objective function in different conditions, subject to network security and plug-in electric vehicles constraints, using particle swarm optimization algorithm
Measurements were carried out using a certified device "Resource-UF2M" Calculation of additional electric losses caused by changes in the current unbalance, calculated according to the technique proposed by Professor Fedor Dmitievich Kosoukhov [5]
Summary
Rural electrical distribution networks (0.38 kV) are characterized by an unbalance distribution of phase currents in a three-phase system. For both type of rotors, we analyse motor derating factor based on voltage unbalance and increases in total losses and rotor losses. In [3] describes the effect of plug-in electric vehicles on network voltage unbalance is investigated in the form of optimization problem.
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