Design And Simulation Of Multi-source Shore-to-ship Power Supply System

The using of shore power instead of auxiliary generator on board to supply power to the load can effectively control pollution emissions from the port.In some remote ports where commercial power supply is difficult or unstable,the research on multi-source shore power technology for wind and photovoltaic power generation is helpful to the popularization and application of shore-to-ship power system.The thesis is focused on the multi-source shore-to-ship power system.The shore power system with wind power,photovoltaic power generation and LNG gas power generation was designed.The simulation model of multi-source shore-to-ship power supply was established,and the control method of shore power gridconnected was analyzed.Main work of the thesis is as follows:(1)The overall structure of shore-to-ship power system is studied.The multi-source shore power with wind and solar power was designed,which capacity can be increased step by step according to the ship load demand.The simulation models of wind power generation and photovoltaic power generation were established,and the operation process and overall simulation system of multi-source shore power system were established and studied.(2)Shore-based power supply with multi-source wind and solar sources was designed.According to the application requirements,the selection and configuration of photovoltaic power supply and wind power supply are studied,and the modeling and simulation analysis of photovoltaic cells were carried out.On this basis,the energy storage system was studied and designed.In order to accurately monitor the health status of battery in energy storage system,a real-time SOH estimation system of battery based on gray model and RBF neural network was designed.(3)Research on seamless grid-connection control of shore-to-ship power was accomplished.The mathematical model and simulation structure model of shore power and ship power were established.The grid connected conditions,grid connected process and the principle of seamless grid connection of shore power were analyzed.The grid connected control method based on virtual synchronous generator and droop control was studied.The control strategy of ship shore grid connection and the control method of multi-source shore power grid connection were simulated,the simulation results show that the control model has high correctness and stability.(4)The mobile LNG shore power system was designed and analyzed.Using the gas turbine generator set as the shore-based power supply,the mathematical models of the speed control,acceleration control,temperature control and fuel control of the gas turbine were designed.Through the simulation of mobile shore power,the control strategy of mobile LNG shore power and the process of grid connection and offgrid were analyzed and verified.