计及供热区域热惯性的多微网调度策略

Multi-Microgrids Dispatching Strategy Considering Thermal Inertia in Heating Area

冷热电联供(combined cooling heating and power,CCHP)型微网可实现能量的梯级利用,提高能源利用率。建筑物的热惯性以及微网间的功率交互会对多微网系统的经济调度产生重要影响。针对含冷热电联供系统的多微网,首先建立了考虑供热区域热惯性及微网间功率交互的多微网经济调度模型。该模型以多微网系统经济性最优为目标,考虑了微网间的功率交互,并增加了散热器散热量作为控制变量,将传统热负荷平衡约束转化为室内温度满足人体舒适度要求。之后通过算例分析比较了不同运行方式下,微网中微源的运行情况和多微网系统的经济性。结果表明,综合考虑供热区域热惯性以及相邻微网间功率交互会改变微网中各微源的出力,提高多微网系统的经济性。

The cascade utilization of energy can be achieved by combined cooling heating and power(CCHP)type of microgrids,meanwhile the energy utilization efficiency can be improved.Both heat inertia of the building and power interaction among microgrids may have a significant impact on economic dispatching of multi-microgrid system.In allusion to the multi-microgrid containing CCHP systems,an economic dispatching model,in which the heat inertia of heating area and the power interaction among microgrids was taken into account,was built.Considering power interaction among microgrids,in this model the optimum economy of multi-microgrid system was taken as the objective,and the heat dissipation quantity of the heat radiator was added as a control variable,besides the constraint of traditional thermal load balance was translated into the indoor temperature to satisfy the human comfort requirement.And then,both running conditions of the microsource in microgrids and the economy of the microgrid system under different operating modes were compared by the analysis on calculation examples.Simulation results show that overall considering the heat inertia of heating area and the power interaction of adjacent microgrids the output of microsources can be changed so that the economy of multi-microgrids system can be improved.