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Choosing the Order of Renovation of Relay Protection Devices by Using Statistical Criteria of Game Theory

There are many cases of incorrect work of relay protection due to the fact that most of the using devices are outdated. However, it is difficult to make a comprehensive replacement of all protections with modern ones due to the lack of funding and the high cost of modern devices. Therefore, an important task is to develop ways to solve this issue in the conditions of partial uncertainty of the initial information. An approach using game theory is considered that allows planning a reconstruction of relay protection with a limited budget and minimal risk. The choice of one of two variants for the reconstruction of the relay protection under conditions of uncertainty and lack of information is analyzed. When proving the options of reconstruction of relay protection, the most appropriate criteria were found to be the Hodges–Lehmann, Wald, and Bayes criteria. It is shown that the choice of the optimal strategy, taking into account the minimization of damage during the actions of relay protection, will allow to combine the indicators of reliability and efficiency when choosing the variant of reconstruction. The obtained results illustrate that this approach is promising for improving the reliability and correct distribution of budget funds during the reconstruction of substations.