Configuration Optimization And Simulation Monitoring Of Diesel-Electric Hybrid Power Systems

Hybrid power system is powered by two or more energy sources.It can optimize the energy distribution among power sources by formulating energy management and control strategy.Compared with pure diesel power generation,hybrid power system has the advantages of low emission,high reliability,high fuel efficiency and long-term mileage,which is a research hotspot in some application fields of rail transit in China and abroad.Based on the project requirements of the key open project "Research on hybrid locomotive circuit and energy management and control technology" of CRRC Zhuzhou Electric Locomotive Co.,Ltd.,this paper has done two aspects of work: Firstly,the configuration optimization of power system is completed.Secondly,the simulation monitoring system is designed and completed.Firstly,according to the established circuit topology and parameters of the hybrid power system,a multi-objective configuration optimization model of the system is established,including an economic model,a weight model and a fuel consumption model.By introducing the weight coefficient,a general evaluation function is obtained to comprehensively evaluate the effect of locomotive parameter matching,and the given battery SOC,volume and weight range are taken as constraints,with cost saving,energy conservation and emission reduction as the optimization goal,the genetic algorithm is used to optimize the configuration parameters of the power system.The results of the genetic algorithm in this paper are compared with those of the particle swarm optimization algorithm,and the results of the two algorithms are similar,which confirms the feasibility of the algorithm.Secondly,based on the requirements of off-line simulation monitoring of hybrid power system and the characteristics of MATLAB operating platform,the functional requirements analysis and overall design scheme of the monitoring system are completed.The simulation monitoring system is designed based on the Dynamic Link Library technology and the Lab VIEW software platform.The human-computer interaction interface design of the host computer,including topology selection,configuration parameter optimization,model parameter initialization,real-time operation monitoring and report analysis,is completed.The data interaction between the host computer simulation monitoring system and the MATLAB off-line simulation platform of the hybrid power system is realized.The correctness of each part of the upper computer monitoring system is verified by simulation.Finally,based on the requirements of real-time simulation monitoring of hybrid power system and the characteristics of RT-LAB operating platform,the design of monitoring system including initialization command issuance,waveform real-time display,report analysis is completed,and the real-time data interaction between Lab VIEW monitoring system and hybrid power system RT-LAB real-time simulation platform is realized.Through the real-time simulation experiment,the correctness of the functions of each part of the monitoring system is verified,and the real-time monitoring results show that the energy management control strategy based on the optimization rules can achieve lower fuel consumption on the premise of ensuring the power performance and stability of the system,which provides a guiding scheme for the design of new vehicles under specific lines.82 figures,6 tables,70 references.