Design And Experimental Research Of Ship Gas-Electric Hybrid Test Platform

With the progress of society,energy shortage and emission pollution have become the main factors restricting global development.Adopting new power forms to achieve energy conservation and emission reduction has become the main means to solve the crisis in the shipping industry,and also the main trend of its development.Marine gas-electric hybrid power system is a propulsion system combining multiple power sources.Using gas-electric hybrid power technology can effectively improve Marine energy efficiency and reduce gas consumption and emissions.At present,the research of Marine hybrid power technology is in the initial stage,and the key technologies cannot break through to restrict its development.The test is an effective way to solve the problem.It is of great significance to construct Marine gaselectric hybrid power test platform and carry out the test research of hybrid power platform.According to the research demand of Marine gas-electric hybrid power system,this paper carries out the design and test research of gas-electric hybrid power test platform.The main research work completed includes the following aspects:Design of Marine gas-electric hybrid test bench.Firstly,the working principle of Marine gas-electric hybrid system is analyzed,and the typical technology required for the development of hybrid test bed is summarized.Then,the design principles and technical indicators of the platform are proposed for the purpose of conducting in-depth research on the hybrid power system.On this basis,the design scheme of the test bench with reasonable layout,close to the real ship environment and certain technical advancement is proposed.Then,according to the basic characteristics of the equipment required by the system,the selection and matching research of gas engine,reversible motor,energy storage system,gear box,dynamometer and other equipment is carried out successively,and the specification parameters such as shaft diameter and shaft length of the drive shaft are calculated.Finally,the layout design of the platform is carried out according to the actual situation of the test site,and the construction of the hybrid power test platform is completed.In order to realize the automatic control of the hybrid test platform and collect and monitor the parameters in the running process,this paper designs and develops the test system based on RCP rapid control prototype technology and Compact RIO series hardware equipment of NI company.First,the main control cabinet of the system is designed and built as the carrier of hardware equipment.The running state of the system can be reflected through the cabinet panel to realize the machine-side control of the platform.The equipment characteristics were analyzed to determine the rule-based system control strategy of the hybrid power test platform.The strategy model was built using Simulation software,and the strategy was compiled and imported into the controller by code generation technology to complete the development of the lower computer software.Design the upper computer of the system based on Veristand software,configure the data acquisition channel of the platform,debug the communication between various devices,build a clean and beautiful system monitoring interface,realize the data acquisition and storage,remote control of the platform,and finally complete the development of the platform test system.After the completion of platform construction and test system commissioning,the experimental study of Marine gas-electric hybrid power system is carried out according to the proposed technical indexes.The start-up test,shutdown test,mode switching test and cycle condition test of the gas-electric hybrid test platform were designed and carried out,and the data of system speed,torque and SOC were collected and analyzed.The test results showed that the stability time of start-up,stop and mode switching of the developed power system was≤20s,and the equipment speed fluctuation was ≤20r/min under steady condition.The system can run automatically according to the setting of control strategy to meet the requirements of platform design.Finally,the influencing factors of the test results are analyzed,and reasonable suggestions are put forward for the optimization and improvement of the platform.