Study On Operation Optimization And Comprehensive Evaluation Modeling Method Of Gas Turbine Combined Cooling Heating And Power Energy System

The distributed energy system is a new energy power system.It achieves the goals of multiple energy applications such as efficient energy use,improved energy security,and reduced environmental pollution.The CCHP system is a distributed energy system.It is a way that small-scale,decentralized,and targeted of generating power generation demand in the vicinity of users.It is one of the most dynamic systems for the development of distributed energy.This article makes a detailed analysis of the application of the CCHP supply for buildings in a certain area of Guizhou.Mathematical modeling of the gas turbine,waste heat boiler,and direct-fired lithium bromide absorption chiller in the energy supply system is built.The model expresses the structure of the energy flow in the system in detail,so that the optimal operating parameters of the triple heat supply system for cold,heat and electricity can obtain accurate values.The optimization of the operation strategy of the gas turbine combined cooling,heating and power triple supply system is a complex issue.This paper uses the minimum operating cost as the single objective function and the minimum operating cost,and make the primary energy utilization rate,the primary energy saving rate for different objectives under different constraints as multiple objective function,the model of the function is optimized and solved.The operating parameters obtained by MATLAB software are solved and the operating strategy is comprehensively discussed.It is found that in a single objective function,when the two constraints are whether the power is input to the public power grid,the gas turbine runs as high as possible under high load.The distribution rate of gas flow rate X first meets the heat load demand of the waste heat boiler,but in order to meet the system output power is fully utilized,when the cold and heat load is relatively high,the optimal partial load rate of the gas turbine is less than the optimal partial load rate of the gas turbine under the mode that the power can enter the public grid.In the multi-objective function,the optimization result still satisfies the gas turbine running as much as possible under the high load.The flue gas flow distribution rate X gives priority to the heat load demand of the waste heat boiler.When the electric energy can be input into the constraints of the public power grid,and the electricity price will become a dominant factor,and the demand relationship between cold,heat and electricity loads will also affect the operating strategy.This paper also establishes a multi-level evaluation index model.The evaluation index factors include economic,environmental,social,unit performance,and noise.The indicators were quantified using the hybrid grey correlation multi-hierarchy comprehensive evaluation method that combines the principles of the Analytical Hierarchy Process?Fuzzy Logic and the method of Grey Theory Comprehensive evaluation.In addition,the weight vector obtained by the method of cumulative advantage is improved to the weight vector obtained by the normalization of the feature vector after judging the consistency of the matrix.The model has good flexibility,extensibility and rationality.Through the comprehensive evaluation of the project scheme,the established model is proved to be reasonable in the project and the scheme is selected through the analysis of hierarchical index value.