Improving the efficiency and reliability of RPA systems of digital step-down substations and digital gridsAlexey V. Mokeev, Sergey A. Piskunov, Dmitry N. Ulyanov and Evgeniy I. KhromtsovE3S Web of Conf., 216 (2020) 01044DOI: https://doi.org/10.1051/e3sconf/202021601044