The Study Of Marine Electric Propulsion System Modeling And Simulation

The electric propulsion has become the development direction of the marine propulsion by its superiorities ,but at present the research of surface vessel electric propulsion system in domestic is still at the start stage, and there are many problems in the practical application process, therefore, develop the modeling and simulation of the marine electric propulsion system, not only is an innovative work, but also can be used for reference to the development of the marine electric propulsion. The subject which is supported by the fund of "the marine electrical propulsion simulation lab" from Wuhan University of Technology, studies and analyzes the marine electrical propulsion system by the simulation software.This subject regards the electric propulsion system which applying the vector controls asynchronous motor as the research object. On the basis of summing up, summarizing systemic mathematical model, the paper employ the simulation software Saber to carry on simulation analysis to the system. The groundwork can be divided into two respects of systemic modeling and simulation analysis. Firstly, the paper has summed up and summarized the mathematical model of the hysteresis current vector control system and the voltage-space vector control system. Secondly, the detail analysis and the introduction have carried on to the principle, algorithm, and simulation step of the voltage-space vector control system. Set up corresponding simulation model under the environment of Saber. Analyze dynamic, stable performance of the simulation models built through changing the motor rotational speed and load set signal, analyze and compare the characteristics of the two kinds of vector control systems. Thirdly, set up simple simulation model of original machine, generator, voltage transformer, propeller load etc. Set up marine electric power system simulation model of electric propulsion ship and analyze the dynamic property of the voltage-space vector control system when the propeller is in sailing condition and reversal condition. Get some beneficial conclusions through the simulation analysis.Although some sub-system simulation model is deal with simply when they areset up, but the result of simulation and analyses indicate the whole marine electrical propulsion simulation model has good precision, it can well simulated the actual system working conduction in some ways, the result can be look on as prophase exploration of the little scale physics simulation that is being done in lab.