The work explores a preliminary calculation method to determine the possibility of switching on transformers for parallel operation and creating temporary ring modes in electrical networks of 6 - 10 kV, in order to ensure the transfer of electrical power to consumers without interruptions in power supply. Subject: of research: ring mode of operation of power transmission lines (PTLs) in electrically unconnected distribution networks of 6-10 kV. Materials and methods: the work first proposed a method for creating ring modes of power lines in 6-10 kV electrical networks receiving electrical power from different power centers, between which there is no possibility of creating a temporary electrical connection, by turning on a sectional switch or a separate shunt connection (repair jumper) , for subsequent creation of a ring mode. Results: using the method of preliminary calculations, results were obtained that allow a preliminary assessment of the possibility of creating a ring mode of 6-10 kV power lines between electrically unconnected power centers (CPs). Conclusions: the method proposed in the work for preliminary calculations of steady-state modes makes it possible to assess the possibility of creating a short-term ring mode in electrically unconnected 6-10 kV distribution networks.
ring mode, parallel operation of transformers, reliability, power flow
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