The analysis of the criteria for improving the technical and economic efficiency in the operation of the electric power equipment of power units of power plants. It is indicated that the existing methods for calculating the technical and economic effect do not take into account the factors that lead to technical and economic costs when the power unit is stopped and the load of electricity consumers is reduced. A significant factor in increasing the technical and economic efficiency in the operation of automated control systems for technological processes at the power unit of the power plant is operational control to identify information with a low level of reliability. It is shown that the reliability of the functioning of the technological equipment of the power unit significantly depends on the efficiency of automated control in emergency situations, when unauthorized shutdowns of the power unit occur due to false alarms. It was found that the reason for false alarms is information about the parameters of the technological process of the power unit, which is characterized by a low degree of reliability. It is shown that unforeseen unauthorized shutdowns of the power unit and a decrease in the load for power consumers lead to significant economic and material losses, and, consequently, to a decrease in technical and economic efficiency with automated control of the power unit. It is shown that the applied technical and economic models do not take into account financial and material costs that occur due to an unauthorized shutdown of the power unit and a decrease in the load for electrical consumers in case of false alarms in real time. A unified integrated economic and mathematical model has been developed, which allows calculating the economic effect, taking into account the change in the reliability of the technological equipment of the power unit, due to the timely prompt detection of false alarms and information with a low degree of reliability. To calculate the economic effect on the basis of the developed unified economic and mathematical model, a modular block of the mode of emergency situations is proposed, associated with the modules of false positives and emergency signs, taking into account the static and operational technical and economic components. Practical recommendations are given for using the technical and economic module in the software and hardware complex of the power unit, which allows calculating the technical and economic effect based on statistical data coming from the data memory and current data from the power unit.