The operating mode of promising 6 – 35 kV distribution electrical networks is characterized by a continuous change in their topology and electrical power flow distribution due to a change in load and the presence of distributed generating units. The manual calculation of the relay protection actuation data under these conditions is either impossible due to the significant change rate caused by the above features, or is greatly roughed up to unacceptable sensitivity. The solution to this problem is the use of methods and devices for rapid automatic calculation of relay protection actuation data, taking into account the electrical network current state. The article compares the results of manual and automatic calculations of protection actuation data on the example of typical radial sections of the distribution network. The organization of information exchange based on a distribution electrical network makes it possible for automatic setpoints calculation to continuously receive information about the current state of network switching devices, which allows adapting the protection actuation data without human intervention.
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Translated from Élektricheskie Stantsii, No. 11, November 2022, pp. 52 – 58. https://doi.org/10.34831/EP.2022.1096.11.007
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Sharygin, M.V., Kulikov, A.L., Petrov, A.A. et al. Method for Automatic Calculation of Current Relay Protection Actuation Data of Distribution Networks. Power Technol Eng 57, 169–174 (2023). https://doi.org/10.1007/s10749-023-01638-1
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DOI: https://doi.org/10.1007/s10749-023-01638-1