Ants Kallaste

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All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.

1. Introduction Electrical power transmission networks are susceptible to faults and failures. Power transmission networks are now becoming extremely critical infrastructures that deliver electricity from power plants to households and businesses, and sudden abnormal conditions on these networks can cause power outages, damage to costly equipment, and even serious safety hazards. The rapidly growing demand for electric power is increasing the complexity of power networks day by day.