Abstract
The use of smart switches (reclosers) can significantly increase the reliability of the power supply system and speed up the determination of the fault location. However, when reconstructing an existing or designing a new electrical network, due to the significant cost of this switching device, the question arises of determining the economically feasible number and location of their installation. In this work, a methodology was developed to improve the management efficiency of district distribution networks by installing 6-10 kV reclosers. A method is described for determining the optimal location of reclosers in 6-10 kV distribution networks with main sections and branches with one power source. Basic equations have been formulated for calculating damage from a power outage provided that several reclosers are installed at different points in the network. The algorithm is based on graph theory and matrix algebra methods, which allows you to speed up the process of calculating the necessary indicators, taking into account the topology of the circuit. Generalized equations have been formulated to determine the installation location of the recloser based on the criterion of minimum damage from power outage. The methodology also makes it possible to take into account the operating costs of the designed electrical network for possible options for installation locations of reclosers. The main initial data for the calculation are the technical and reliability indicators of power lines, node loads, as well as the configuration of the electrical network. The paper provides an example of determining the appropriate location for installing reclosers for a regional 6-10 kV distribution network. The given algorithm can be used when designing new or modernizing existing facilities of 6-10 kV regional or city distribution networks.
Keywords
power supply, recloser, distribution networks, intelligent devices, optimization, matrix algebra, graph theory, reliability of power supply systems, damage from power supply interruption
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