Research On Economic Optimization Control Method Of Integrated Thermoelectric Energy System With Micro-gas Turbine

Thermoelectric integrated energy system has been considered as the key to build a clean,low-carbon,safe and efficient energy system and also the future of energy industry,with the characteristics of absorbing renewable energy and high energy utilization efficiency.Due to the fact that renewable energy is greatly affected by climatic conditions,user load changes frequently,and the integrated energy system has much equipment,which has large differences in component characteristics,the economic and stable operation of the thermoelectric integrated energy system has become an increasingly important issue.Therefore,it is necessary to study the economic optimization control method of the thermoelectric integrated energy system.According to the characteristics and operation process of the integrated thermoelectric energy system,this paper studies the applicable economic optimization control method.The main research contents include:1.By the modular modeling method,a dynamic mathematical model of the thermoelectric integrated energy system is established,and the dynamic simulation of this type of system is realized based on the Matlab/Simulink software.On the basis of verifying the validity of the model,through the input step disturbance experiment,in-depth analysis of the characteristics of each device under disturbance,and the mechanism change law of the device is obtained.2.The thermal characteristics and economic evaluation indicators suitable for the integrated thermoelectric energy system are provided.By analyzing the steady-state and dynamic process of each equipment,the economic optimization range of each equipment was obtained,and the key variables were condensed,which provides strong support for economic optimization work.3.An economic optimization scheduling method considering nonlinear characteristics constraints is proposed.First,the daily economic optimization scheduling with the linear characteristics constraints of the equipment is established,and then based on the linear optimization results,a middle optimization layer is established with the nonlinear characteristics of equipment considered,and the nonlinear optimization methods are used to improve the optimization accuracy of each equipment load setting value,the calculation results verify the effectiveness of this method.4.The overall control strategy of the thermoelectric integrated energy system based on economic predictive control is proposed.First,the system is divided into two energy circuits,and the main controller and local control are designed for each circuit.Secondly,the controller of each equipment based on the economic predictive control method is carried out according to the different characteristics of the equipment,and the overall control system is realized.Finally,based on the simulation model,the control system was simulated under various working conditions and disturbances,and the results verified the control performance of the control system.