Analysis And Control Of Nuclear Ship Power System

As a new energy with high energy density,nuclear energy has been widely used in aircraft carriers,icebreakers and other ships that need high-power propulsion for decades.At present,the international ocean situation is complex,and it is of great significance to develop nuclear powered ships.As for the research of nuclear powered ships,the emphasis is mostly on the nuclear reactor itself,and the content is mostly the structural design and physical system simulation of the reactor on board.From the point of view of power system,the control strategy of nuclear power ship can provide theoretical basis for the design and construction of nuclear power ship in China.First of all,according to the power system demand of the existing nuclear power ship,the whole ship’s power load is divided into five categories.The active power of the ship’s power system load under different working conditions is calculated by the method of demand coefficient,and the reactive power of the corresponding load is calculated by the power factor of the load itself.According to the importance of the load,the security classification is carried out to provide the basis for the design of control strategy.Secondly,the nuclear power system and the electric propulsion system in the nuclear ship power system are modeled and analyzed.In the aspect of nuclear power system,the working principle and mathematical model of marine PWR are summarized,and the simulation models of primary circuit,secondary circuit,steam turbine,generator and control system are established respectively.In the aspect of electric propulsion system,the types and characteristics of the existing marine electric propulsion system are summarized and analyzed,and the simulation models of power conversion module,propulsion motor and its load module are established respectively.Finally,a set of nuclear power ship power system with two engines and two oars is established.The control strategies of the ship power system under the normal working condition and the reactor fault working condition are designed respectively.Through PSCAD simulation software,the voltage and frequency fluctuation of the power system under the normal working condition and the voltage changes of the distribution boards at different levels when the reactor fault occurs are verified rationality...