Особливості електроживлення АЕС України під час збурень в об'єднаній енергетичній системі

• Видавець: State Scientific and Technical Center for Nuclear and Radiation Safety
• Дата: 2023
• Автори: Komarytsia, V., Molchanov, O., Bilan, T., Izbenko, I., Grudzynskyi, Yu.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: State Scientific and Technical Center for Nuclear and Radiation Safety 2023
• Онлайн доступ: https://nuclear-journal.com/index.php/journal/article/view/1063

The paper deals with power supply schemes of nuclear power plants and possible disturbances in the power system that may affect the electrical part of an NPP, in particular, disconnection of overhead lines, frequency deviation in the power system (its decrease and increase), de-energization of certain buses of the emergency power supply system, as well as a total loss of the unit auxiliary power supply. The paper presents the main provisions on the stability of the power system, as well as the characteristics of the emergency automation devices used at NPPs to maintain the operational stability of NPP units and NPP as a whole in the power system, and in the case of its stability disturbance - to eliminate abnormal occurrences. The consequences of the above-mentioned emergencies in the power system for equipment operation, as well as the necessary actions of both personnel and the emergency power supply system are considered. In particular, the following is considered: requirements for turbine operation for auxiliary loads: permissible time of such operation, indicators of turbine thermal and mechanical state, etc.; operation of NPP equipment during accidents in the integrated power system with frequency deviations, disconnection of overhead lines and loss of the auxiliary power supply, including equipment of the emergency power supply system. Based on the analysis results, the following conclusions were made: on the feasibility and correctness of the design decisions made and the organization of maintenance for equipment of the emergency power supply system; on the feasibility of implementing the emergency automation system that will be able to provide real-time monitoring of key parameters of the power system to improve NPP operational safety.