Emergency power supply system of a Nuclear Power Plant-modelling and simulation studies of Diesel generators and load pickup on emergency transfer

Nuclear power plants have Normal and Emergency power supply systems. Both the power supply systems are to be reliable for safe operation of the plant. Prototype Fast Breeder Reactor (PFBR) coming up at Kalpakkam is a single unit 500MWe project. DGs (Diesel generators) are the main on site power sources in the Nuclear Power Plants (NPP). Their capability to pick up the emergency loads in desired sequence is paramount for the plant safety. Extensive factory testing and commissioning tests are normally carried out to assure DG performance. Modeling and simulation tools are used to predict the expected responses in advance, which will be helpful during commissioning test. This work covers the modeling and simulation of DG sets, loads connected to the emergency bus and sequential starting of loads to predict the performance characteristics to meet the plant requirements.