Research On Integrated Simulation System Of Ship Shore Power

The use of shore power is one of the most important measures to control the pollution discharge from ships in port.By connecting shore power,the auxiliary machinery on board can stop working completely and achieve zero emission.Research on shore power technology is of positive significance to energy saving,emission reduction and green port construction,and is an important measure to solve the problem of atmospheric environmental pollution caused by shore ships in the port area.In this paper,the method of modeling and Simulation of ship-shore power integration is studied,and a ship-shore power integration simulation system is established,including shore power system simulation model,ship-shore power system simulation model and shore power system fault mode modeling and simulation.The process of ship-shore power integration is simulated and analyzed.The main work of this paper is as follows:(1)The overall structure of the ship shore power integration simulation is designed,and the hardware-in-the-loop simulation platform of the ship shore power system based on dSPACE is built.The simulation structure of the shore power system and the ship power system are designed respectively.(2)Modeling and Simulation of shore power system are studied.The mathematical model of the converter,which is the core component of shore power supply,is established.The control strategy of the rectifier side and AC side of the converter is studied.The mathematical model of the shore power transformer and filter is established.The simulation analysis of the shore power system based on MATLAB/SIMULINK is carried out to verify the above model.(3)Modeling and Simulation of ship power system for the object of shore power system is studied.The mathematical models of marine diesel engine and speed control system,generator,excitation system and load are established.Taking a semi-submarine as a reference object,the simulation model and analysis of marine power system are carried out based on MATLAB/SIMULINK,and the above models are verified.(4)The fault mode and fault diagnosis method of shore power system are studied.A fault diagnosis method of support vector machine based on improved particle swarm optimization is proposed.The parameters of support vector machine are optimized by introducing dynamic velocity inertia weight and race search factor.The simulation results show that the improved algorithm has higher fault pattern recognition accuracy than others.Finally,the fault diagnosis simulation platform of shore power system based on dSPACE is established by using this method.(5)The grid-connected process of ship shore power system is analyzed and simulated.The principle and method of grid-connected shore power system are analyzed.Four grid-connected conditions and detection methods of quasi-synchronous grid-connected method are analyzed.A grid-connected condition detection and control model is established.The grid-connected detection and control model is simulated based on MATLAB/SIMULINK and the correctness of the model and the grid-connected process control is verified.The research of ship shore power system modeling and integrated simulation system provides an analysis basis for the design and development of shore power system,and provides a method for fault diagnosis of shore power equipment and design of grid-connected control strategy.