多源区域型分布式冷热电互联系统优化调度

为了提高区域分布式冷热电联供系统的能源利用效率,考虑冷/热环网和电力辐射网的耦合,构建了冷热电联供单元与液态天然气冷能梯阶利用的能源系统。计及负荷需求和可再生能源的不确定性,通过对互联系统的天然气输入量、用户购入和回馈电量进行决策,以天然气购买成本、购电成本、碳排放成本和交互功率不平衡结算成本之和最小化为目标,提出多源区域型分布式冷热电互联系统的协同优化模型。以IEEE-15节点系统为例,详细分析了独立系统和互联系统对配电调峰的影响以及不平衡价格系数对运行成本的影响,结果验证了分布式冷热电联供互联系统具有很好的经济和环境效益、调峰效果和运行可靠性。

Optimal Dispatching for Multi-energy Regional Distributed Energy System with Combined Cooling,Heating and Power Generation

To improve the energy utilization efficiency of a regional distributed energy system with combined cooling , heating and power generation ( DES/CCHP ), an energy system with cogeneration units and liquefied natural gas ( LNG ) cold energy ladder utilization is constructed considering the coupling between cold/hot ring network and power radiation net-work. By taking the uncertainties in load demand and renewable energy into account , a collaborative optimization model of a multi-energy regional distributed system with CCHP is put forward. The objective is to minimize the sum of the cost of natural gas purchase , cost of electricity purchase , cost of carbon emissions , and the unbalanced settlement cost of in-teractive power. The decision variables include the input quantity of natural gas , and electric quantities purchased by users and fed back by them. An IEEE 15-bus system is adopted as an example , and the influences of independent and interconnected systems on the peak-regulation of power distribution system , as well as the influence of unbalanced price coefficient on the operation cost of the system , are analyzed in detail. Numerical results verify that the distributed system with CCHP has good economic and environmental benefits , peak-regulation effect and operation reliability.