基于区间线性规划的区域综合能源系统日前优化调度

Day-Ahead Optimal Dispatching of Regional Integrated Energy System Based on Interval Linear Programming

针对区域综合能源系统在市场环境下的优化调度中未充分考虑多个系统互联及光伏/负荷的预测误差等不确定性的现状,研究基于区间线性规划的区域综合能源系统日前优化调度方法。采用区间数对光伏出力及负荷的不确定性进行区间描述,以能源服务公司利益最大化为目标,综合考虑多能互补和网络互联及环境效益,并采用分时电价制度,建立基于区间线性规划的区域综合能源系统日前经济优化调度模型,其目标函数及优化变量均以适宜区间来表示。采用强化区间线性规划方法进行求解,能够保证解空间的绝对可行性。通过算例分析验证了该方法的可行性与合理性,仿真结果表明:在多个能源服务公司参与交易的背景下,区域综合能源系统及配网的互联可提高能源服务公司总盈利,区间形式的最优解为决策者提供了选择空间,可以反映系统中不确定因素对能源服务公司盈利的影响。

In current energy market environment,interconnection among multiple integrated community energy systems（ICESs） and uncertainties of forecasting errors of PV and electric load are not fully considered in ICES optimal dispatching.In this regard,in this paper,day-ahead optimal dispatching of multiple ICESs is studied based on interval linear programming.Uncertainties of PV output and electric load are both described with interval numbers.Aiming at maximizing interests of energy service company（ESCO）,an interval linear programming model is built to get day-ahead optimal dispatching of multiple ICESs,where objective function and decision variables are represented with appropriate interval numbers.Aspects of multi-energy interaction,network constraints,environmental benefit and time-of-use（TOU） price are considered together in above model.The model is solved with enhanced interval linear programming（EILP）.EILP contributes to ensuring feasibility of whole solution space.Simulation results show that under background of multiple ESCOs taking part in transaction,interconnection of multiple ESCOs with distribution network can increase total ESCO profit.Optimal solution in form of interval can provide more options for decision makers,and reflect effects of uncertainty factors on ESCO profit more actually.