Control And Simulation Of Ship Power System Under Single Machine Operation

With the advancement of science and technology,the high-power power equipment on marine ships is increasing,and the ship power system becomes more complicated.In order to improve the reliability and stability of the operation,the ship can be optimized in various states Configuration,control and simulation of the power system is necessary.Taking the electric power system of a real ship as the research object,first introduced its structure and its speed and terminal voltage control method.Then,according to the working principle of the electronic governor used in the ship,the mathematical model of the system is deduced.The simulation model is built on MATLAB/Simulink and the simulation experiment is carried out under the single machine operating condition.Using the traditional PID and fuzzy PID in two ways to control.The results show that the two control modes have good control effect on the speed control system,and the fuzzy PID control has better speed control reliability.Then,the mathematical model of the synchronous generator and the excitation system is established.Controlled voltage is controlled by a controllable phase compound excitation device,and in MATLAB/Simulink to build its simulation model,in the stand-alone operation under the conditions of the terminal voltage control simulation test.The results show that the design of the excitation voltage regulator on the terminal voltage adjustment effect is obvious.Finally,taking into account the influence of the coupling between speed and voltage on the ship power system,a simulation model of the integrated control system is established,and the typical working condition and fault simulation test of the ship power system under the single machine operating condition are carried out by using MATLAB/Simulink.The simulation results show that the control strategy is appropriate and can realize the control of the ship power system under the single machine operating condition and keep the stable operation of the ship power grid.The fuzzy PID controller can improve the control precision of the prime mover speed.The excitation voltage regulator has a good control effect on the terminal voltage,and the adjustment precision is very high when the load changes,the whole system is in a stable running state.