电-气-储区域综合能源系统协同规划方法研究

Study on Collaborative Planning Method for the Electricity-gas Storage Regional Integrated Energy System

为发挥储电和储气在区域综合能源系统中的作用,在规划时充分考虑储能的投资建设,提出了电-气-储区域综合能源系统协同规划方法。首先,建立了电-气-储系统的能源集线器结构;然后,以电-气-储系统扩建成本最小为目标,建立系统内储电、储气、电网络拓扑、气网络拓扑和P2G的数学模型,提出在已有电-气耦合综合能源系统基础上扩建储能、电力线路和天然气管道的协同规划模型;引入辅助变量将原始难以求解的模型转化为混合整数线性规划模型,并调用CPLEX求解器求解。最后,通过浙江省实际数据验证了电-气-储系统协同规划的经济优势。分析表明,储电和储气的接入能够减轻系统压力,优化设备选型。

In order to give full play to the role of electricity-gas storage in the regional integrated energy system,the investment and construction of energy storage were fully considered at the planning stage,and a collaborative planning method was proposed for electricity-gas storage regional integrated energy system.Firstly,an energy hub structure of the electricity-gas storage system was established.Then,a mathematical model was constructed for electricity storage,gas storage,electricity network,gas network topology and P2G within the system,aiming at minimization of expansion cost of the electricity-gas storage.It was proposed that,based on the existing electricity-gas coupling integrated energy system,a collaborative planning model be established for energy storage,electric power line and natural gas pipeline;auxiliary variables were introduced to transform the model which had been difficult to solve into a mixed integer linear programming model,and a solution was found by the CPLEX solver.Finally,actual data collected from a project in Zhejiang Province verified economic advantages of the collaborative planning for the electricity-gas storage system.It was concluded that access of electricity-gas storage could reduce system pressure and help optimize equipment selection.