A.F. Zharkin, V.O. Novskiy, V.A. Popov, O.S. Yarmoliuk, Hawkar Ahmed Noory
An overview of the statements and methods for implementing the problem of distribution networks reconfiguration, as one of the most effective organizational measures to reduce electrical energy losses, is presented. Various formulations of this problem and optimization methods used for its solution are analyzed considering its as a medium-term planning problem, when the optimal disconnection points were determined for the most characteristic seasons of the year. It is shown that in modern power supply systems under the conditions of widespread implementation of distributed generation energy sources and storage units, the use of electric vehicles, the solution of this problem within the framework of the traditional approach loses its effectiveness. It is shown that in this case it is necessary to use the dynamic reconfiguration of distribution networks. Here one of the possible ways is associated with the use of remotely controlled switching devices. An algorithm that allows one to choose the optimal locations and operating mode of switches with remote control, for electrical energy losses minimization, taking into account the switching resource, is proposed. It has been demonstrated that this technical solution is justified in the case of cyclic and sufficiently long-term changes in loads, output power of distributed energy sources, when turning on/off storage devices. It is shown that a more universal solution is the use of power electronics, which makes it possible to form the so-called “soft” open points of the distribution network circuits. Under these conditions, it becomes possible to realize the real time control of the active and reactive power flows, ensuring the minimization of electrical energy losses.
electrical distribution networks, mode of operation control, distributed generation, remotely controlled switching devices, soft open points.
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