The Research On Optimal Configuration And Operation Of Electro-Gas Integrated Energy System

With the rapid development and progress of society,energy shortages and environmental pollution have become more serious,which have become huge obstacles to the healthy development of society.An integrated energy system composed of renewable energy such as wind energy has become an important way to solve these problems.With the development of integrated energy systems,the coupling between energy sources such as electricity,gas,and heat and the mutual substitution of energy sources have provided new ways to solve the problem of energy shortage.Based on the electric-gas integrated energy system,this thesis establishes an optimal configuration model of the integrated energy system that takes into account the uncertainty of wind power,and proposes an optimal configuration operation strategy.Aiming at the problem of system operation,a two-layer optimization model based on demand response was proposed for solving,and the analysis was verified by simulation.The specific research is as follows:Firstly,this thesis analyzes the components of the electric-pneumatic integrated energy system,including mathematical models of wind turbines,electricity-to-gas equipment,gas turbines,gas-fired combined heat and power units,gas boilers,batteries,and other equipment.Based on the above mathematical models,energy sources are constructed dual-port network on the power side,energy conversion side and load side,and a mathematical model of the integrated power-gas energy system under demand response.Secondly,for the uncertainty of wind power output,this thesis uses the latin hypercube simulation method and backward reduction technology to perform the scenario.The typical scenario of obtaining wind power output is reduced,and the electricity-to-gas equipment is used as an adjustable resource to respond to the fluctuation of wind power output.The minimum investment and operating costs and the maximum system adjustment level are taken as the system goals.The wind power uncertainty is considered.The optimal configuration model of the electric-gas integrated energy system is solved according to the coordinated control strategy between various equipments to obtain the optimal configuration result of the electric-gas integrated energy system.The simulation analysis and verification of the electric-gas considering the uncertainty of wind power of the optimal allocation method in integrated energy systems.Finally this thesis introduces demand response to adjust the electricity-gas integrated energy system equipment and users to further balance the load curve.It takes into account the electricity-gas integrated energy system to achieve internal demand response adjustment through its own energy conversion strategy,and also considers the use of time-sharing.The electricity price guides the load-side users to adjust the load transfer to achieve external demand response adjustments.With the system operation cost and the user’s electricity consumption cost as the minimum system goals,an optimal operation model of the electricity-gas integrated energy system based on demand response is constructed.And based on this,an improved teaching and learning algorithm is used to solve the above model,and three schemes are set for analysis.The calculation results verify the feasibility and effectiveness of the proposed method.In summary,this thesis summarizes the optimization of the electric-gas integrated energy system considering the uncertainty of wind power output and the optimal operation based on demand response,and looks forward to the future.