Real-time Simulation And Optimization Simulation Of Combined Cooling Heating And Power System

Cold heat type electric installations,energy system is a new kind of power system currently popular attention,at the same time of power to users of cooling,heating,the system is a kind of contains a variety of energy in the form of integrated energy system,many kinds of energy conversion and recycling,improve the efficiency of energy utilization,the hot and cold type electric installations,mathematical modeling and simulation of the energy system is the basis of the analysis of system performance,To change the performance parameters of the system and analyze its dynamic change law is an important topic in the research of integrated energy system.The purpose of this thesis is to build a real-time simulation platform for CCHP energy system.This paper first Outlines the significance of wind and light energy access on the basis of CCHP system,and describes the development of distributed CCHP energy technology at home and abroad,from the concept of CCHP energy system to the national support development strategy,and finally to the maturity of the development technology.Secondly,the maximum wind energy tracking control strategy in the variable speed permanent magnet wind generator system is studied,which has important practical significance for the research of variable speed permanent magnet wind power system with fixed pitch.The basic working principle of the solar cell was studied,the mathematical model was deeply understood,the changes of various physical quantities were studied under the condition of changing the illumination intensity and temperature,and the performance of the system was studied.Finally,the simulation model was built by using Matlab/Simulink.Secondly,starting from the physical structure of the MGT,the working principle of each component and the complete running process of the gas turbine are analyzed in detail.According to the working flow of micro-gas turbine,the compressor of compressed air,the volume effect module of pipeline,the combustion chamber of fuel combustion,the power unit-turbine,the generator rotor,and the speed control link are successively studied.Secondly,based on the micro gas turbine simulation model,according to its working principle and the components of the lithium bromide absorption refrigerating machine,the low temperature flue gas discharged as the heat source of the lithium bromide absorption refrigerating machine drives the physical conversion between cold and heat,and realizes the coupling between cold and heat energy.Based on the equation of the physical properties of the solution in the lithium bromide absorption refrigerator,the function function is written to facilitate the call in the process of building the model.Finally,the simulation experiment is carried out on the model.During the normal operation of the simulation,when the fuel quantity changes,the changes of the parameters of each module are observed and analyzed in combination with the theory.Thirdly,taking the lowest system operating cost as the objective function,based on the improved particle swarm optimization algorithm(PSO)and using the method of chaos theory,chaos variables are introduced to effectively change the distribution of particles and improve the global search ability of the algorithm.According to the optimal solution of the objective function and the demand of the load in the system,the output of fan,photovoltaic and micro-gas turbine is determined,and each distributed unit in the energy system is dispatched by using real-time electricity price and user demand.The result of optimization is that the consumption of wind power generation and photovoltaic power generation is increased,the power generation of gas turbine tends to be stable,and the system operation cost is the lowest.Finally,the paper summarizes the work of the whole paper and prospects the future research direction.