Optimizing Design on Emergency Power Supply of Large Dynamotor Unit

Diesel generator unit as the emergency power of the plant has an important effect that whether the generator unit can stop safely or not in the accident conditions. In order to optimize the design of an emergency power for the large dynamotor unit, the 2*600MW aircooling unit emergency load is taken as an example, four kinds wring schemes of the emergency power are designed and constructed by the ETAP software. The reliability, power flow, short-circuit current and economic data of the four schemes are evaluated. Through the comparison, the optimal, economic, and reasonable scheme of the alternating emergency power and diesel generator unit could be put forward, the Option IV is recommended as satisfying emergency power for the 600MW air-cooling unit. The simulation results of 600MW alternating emergency power can also provide a reference for the 1000MW unit design of emergency power.