考虑光伏与电价不确定性的综合能源生产单元自调度报价策略研究

Self-scheduling Offering Strategy of Integrated Energy Production Unit Considering Uncertainty of Photovoltaic and Electricity Prices

在低碳政策激励下,对传统燃煤发电机组进行升级改造已被提上日程。综合能源生产单元(integrated energy production unit,IEPU)这一新概念逐渐受到学界和工业界关注。选择IEPU作为研究对象,探究它在电力市场环境下的自调度报价策略。首先,建立了IEPU的自调度利润最大化模型,使用鲁棒优化方法处理IEPU内光伏出力、电价的不确定性,将IEPU的自调度问题建模为一个混合整数线性规划(mixed integer linear programming,MILP)问题。在此基础上,结合k-means聚类方法提出考虑报价段数限制的IEPU自调度报价曲线的生成方法。最后,通过案例仿真研究了IEPU各组件间的耦合关系和运行特性,生成了IEPU报价曲线,分析了IEPU自调度方案对甲烷价格的敏感性,并研究了鲁棒性参数对自调度方案和报价曲线的影响。

Inspired by the low-carbon policies,the upgrading of the conventional coal-fired generation units is put on the agenda.The new concept of the integrated energy production unit(IEPU)has gradually attracted the attention in the academia and industry.Taking the IEPU as the research object,this paper explores its self-scheduling offering strategy in the electricity market.Firstly,this paper establishes the operation model of the IEPU,and adopts a robust optimization method to deal with the uncertainties of the PV output and the electricity prices in the IEPU.Then,the self-scheduling problem of the IEPU is modeled as a mixed integer linear programming(MILP)problem.On this basis,combined with the k-means clustering method,this paper proposes the IEPU self-scheduling offering curve generation considering the limitation on the numbers of the offering segments.Finally,through case studies,this paper studies the coupling relationship and the operating characteristics of the IEPU and generates the IEPU offering curves.It also analyzes the sensitivity of the IEPU self-scheduling scheme to the methane price,and studies the influence of the robust parameters on the self-scheduling scheme and the offering curves.