Oil and gas production facilities place high demands on the reliability of the power supply system. In the event of a failure of the electrical networks of such consumers, significant economic damage occurs and there is a high probability of threat to the environment. To improve the reliability of oilfield electrical networks, it is necessary to introduce automated systems to eliminate violations in power supply modes. Automatic control systems for operating modes of electrical networks must have high reliability indicators. The paper proposes to assess the reliability of the automatic control system using the event tree method. The development of an event tree makes it possible to evaluate the efficiency of the automatic control systems, to identify elements and control algorithms that do not meet the reliability requirements.
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