Flywheel-based Micro Energy Grid for Reliable Emergency Back-up Power for Nuclear Power Plant

The Emergency Power Supply (EPS) is an inevitable part for the reliability of a Nuclear Power Plant (NPP). In case of failure of the power supply to electrical equipment in the NPP, the backup EPS plays a vital role. This paper proposes an innovative approach, with Flywheel-based Fast Charging Station (FFCS) along with Micro Energy Grid (MEG), to confirm the continuous power supply to the electrical system during the emergency in NPP. The paper focuses on the emergency diesel generator and battery system, which are connected to the Class III and Class I power of the NPP respectively for emergency purpose. The proposed model will eliminate the drawbacks of the battery system and the diesel generator. The MEG can operate in both mode; grid-connected mode (normal mode) and islanded mode (emergency mode). In normal mode, the electricity will be generated, stored in the main grid via an energy storage system or supplied to the consumer end. Under the emergency condition, the MEG will be disconnected from the main grid and will be connected to the FFCS depending on the requirements. The simulation results intend to show the novelty of the proposed model.