Methodology for Placing Devices for Sectioning the Electrical Grid 0,4 kV

Abstract

A literature review was carried out, which showed a shift in the emphasis of digital transformation of the electric power industry on the development of methods and means of automation of rural electric networks of 0.4-10 kilovolts. It is shown that the actual direction of automation of rural electric networks is the development of means of their partitioning and redundancy, including the creation of relatively inexpensive devices for partitioning – dividing power lines into sections. The use of these devices requires the creation of methods for selecting their installation locations in electrical networks. (Research purpose) The research purpose is developing a methodology for locating the installations for sectioning the electrical grid. (Materials and methods) Analyzed literature sources, existing methods for selecting installation sites for partitioning tools. We used general scientific methods, methods of reliability theory, electrical engineering. (Results and discussion) Suggested options for the placement of devices for dividing the electrical network, depending on the purpose of their use. The criteria for choosing the installation locations of the electrical network division devices were given, which included ensuring the protection of the power transmission line from remote short circuits, primarily single-phase, increasing the reliability of power supply to consumers, preventing voltage deviation from exceeding permissible limits. Presented a methodology for selecting the installation locations of electrical network division devices according to the proposed criteria. (Conclusions) It was revealed that for radial and radial with soldering of electrical networks, the main criterion is to ensure the protection of remote short circuits, and an additional one is to increase the reliability of power supply. It has been shown that for ring networks, the main criterion is to prevent voltage deviation from exceeding permissible limits along with the criterion of ensuring protection from remote short circuits, and the criterion for increasing reliability is an additional one. It was established that the final place of installation of devices for dividing the electrical network into sections in each case is determined taking into account the specified criteria so that the main ones are not violated.