Design method for load optimization of emergency diesel generator set of pressurized water reactor nuclear power plant

The invention relates to a design method for capacity optimization of an emergency diesel generator of a pressurized water reactor nuclear power plant. The design method comprises the following steps: (1) analyzing and determining functions of the emergency diesel generator; (2) splitting the functions of the emergency diesel generator, and determining the capacity optimization principle of the emergency diesel generator according to the load type; (3) analyzing the maximum allowable loading time of on-load equipment of the emergency diesel generator, and optimally configuring the loading time of the load of the emergency diesel generator; and (4) on the basis of the optimization principle, completing the loading capacity and step optimization of the emergency diesel generator. According to the method, the load calculation preparation of the emergency diesel generator is ensured, the capacity of the safety-level emergency diesel generator is reduced, the purchase cost is reduced, the loading time sequence of