| With the development goal of low-carbon energy and the proportion of new energy generation increasing,the traditional “self-sufficient” energy system is becoming increasingly weak in response to this trend,and the power system is seeking a more comprehensive development approach.Based on the conventional power system,the regional integrated energy system has developed a new type of energy system with more efficient and complex composition structure,energy supply and energy use characteristics,which can often integrate multiple energy supply methods to achieve the goal of synergistic and optimal operation,meet the diversified energy demand on the load side,help realize the comprehensive use of various types of energy,improve the level of new energy consumption,and is also one of the effective ways to help low-carbon development.It is also one of the effective ways to help low-carbon development.Therefore,this essay focuses on the regional integrated energy system and considers the optimal configuration of system economy and low carbon under the influence of the introduction of carbon trading mechanism.Firstly,the general structure of integrated energy system is introduced separately,and a multi-energy complementary regional integrated energy system comprising the operation of concentrating solar power plants is structured by an energy hub matrix methodology.The system is divided into three parts: regenerative power supply equipment,energy conversion equipment and energy storage equipment,and the working principle of each equipment in the system is emphatically analyzed and its mathematical model is established individually.Through the establishment of the mathematical model,a foundation is laid for the optimal configuration of the regional integrated energy system in the later section.Then,a carbon trading mechanism model based on the regional integrated energy system is formulated to promote the reduction initiative of the whole energy supply process.The twostage robust optimization model is applied to model the optimal planning problem,taking into account the uncertainty of source-side capacity and load-side demand.The upper level model conducts unit selection and capacity planning with the goal of minimizing the total investment of the system.The lower level model optimizes the output of each equipment with the goal of minimizing the operating costs and energy consumption costs of the system,while including carbon trading costs,and uses column and constraint generation algorithms to solve the problem.The simulation demonstrates that the two-stage robust optimization model can significantly reduce the fluctuation of system capacity placement due to uncertainty factors and reduce the comprehensive dispatching cost.Meanwhile,the participation of concentrating solar power plants enables the system to combine low-carbon and economic performance.Finally,in order to further enhance the environmental objectives of the regional integrated energy system,a life cycle assessment method is proposed to analyze the impact of wind and photovoltaic power generation equipment and electric energy storage equipment on the total carbon emissions in the system.Under the setting of ladder-type carbon trading mechanism,a two-layer optimal placement model is established to take into account the carbon emission characteristics of new energy equipment and electric energy storage,and the upper and lower layers are solved by the improved Gray Wolf algorithm and Cplex solver respectively,with the objective of minimizing the initial planning cost of the upper layer and the integrated operation cost of the regional integrated energy system.The analysis demonstrates that the configuration and operational scheme derived from considering the life cycle theory not only helps to reduce the carbon emissions of the system,but also further enhances the economic-environmental benefits of the system. |
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