| With the problem of global energy crisis becoming more and more prominent and the deterioration of marine environmental pollution,the application of new energy has become a hot spot.Hydrogen energy is a kind of renewable green new energy.The application of hydrogen fuel cell in marine hybrid power system is developing,especially proton exchange membrane fuel cell(PEMFC).Proton exchange membrane fuel cell(PEMFC)is considered as one of the most promising clean energy applications due to its high efficiency,zero pollution and low noise.However,the single PEMFC system has poor power performance and power density,so it is necessary to combine the performance advantages of other energy supply methods,such as lithium battery,super capacitor,etc.,to form a multi energy coupling ship hybrid system with comprehensive performance complementary,so as to improve fuel economy and system stability.At the same time,it will be one of the core research contents for the multi energy coupling ship hybrid power system to carry out the research work of energy control strategy to ensure the best dynamic performance of multi energy supply mode.In order to solve the problems of poor dynamic regulation ability and soft volt ampere characteristics of PEMFC stack,the composition and structure of PEMFC stack system and marine hybrid power system are studied firstly,and the dynamic characteristics of lithium battery and supercapacitor are analyzed to form proton exchange membrane fuel cell stack battery ultracapacitor(PEMFCs-B-UC)performance coupling technology route,and designed PEMFCs-B-UC system,Secondly,the PEMFCs-B-UC system is modularized,and the mathematical models of each module are built.The classical PI control strategy is introduced,and the performance dynamic simulation of the PEMFCs-B-UC system is carried out by using MATLAB/Simulink software.Finally,through the analysis and discussion of the simulation results,it is concluded that the dynamic performance of PEMFCs-B-UC system,such as the high energy efficiency coupled proton exchange membrane fuel cell stack,lithium battery and super capacitor,can meet the dynamic response requirements of the energy demand of the marine power system.The marine hybrid power system based on PEMFCs technology has great development potential and engineering application prospect. |
