考虑配电网容量约束和建筑热惰性的城市换热站电制热补热优化配置方法

Optimal Configuration Method of Electric Heating and Supplementary Heating in Urban Heat Exchange Station Considering Constraints of Distribution Network Capacity and Building Thermal Inertia

北方地区市政供暖普遍存在热源、热网缺口和化石燃料依赖度高的问题,增量建筑的末端供热效果难以保障,而依靠传统配电网增容的方式一定程度上造成了社会资源的浪费。设计了一种面向城市换热站的电制热补热系统,提出了一种配电网“免增容”的城市换热站电制热补热优化配置方法。首先,阐述了电制热补热系统的设计结构,建立了制热设备和蓄热设备的模型与建筑热惰性模型。然后,通过两阶段优化方法,考虑设备投资与运行成本,以经济性为目标,建立了电制热补热优化配置模型。最后,以北京市石景山某居民区为研究对象通过Matlab进行仿真计算,研究结果表明,电制热补热优化配置方法可有效降低配电网负荷峰谷差,保障末端供热效果,并且具有较好的经济性,可为电采暖规划提供参考。

Municipal heating in northern China generally suffers from heat sources,heat grid gaps and high dependence on fossil fuels,and it is difficult to ensure the terminal heating effect of incremental buildings,and relying on increasing capacity of traditional distribution network will result in waste of social resources to some extent.For this reason,an urban heat exchange station-oriented electric heating and supplementary heating system was designed and an optimal configuration method of electric heating and supplementary heating for urban heat exchange stations under the promise of not increasing the capacity of distribution network was proposed.Firstly,the he design structure of the electric heating and supplementary heating system was expounded,and the models of heating equipment and heat storage equipment and the models of building thermal inertia were constructed.Secondly,by means of two-stage optimization method and considering equipment investment and operating costs,taking the economy as objective an optimal configuration model of electric heating and supplementary heating was established.Finally,taking a certain residential area in Shijingshan,Beijing as the research object the simulation on the platform of MATLAB was conducted.Simulation results show that utilizing the proposed optimal configuration method for electric heating and supplementary heating the peak-to-valley difference of distribution network can be effectively reduced and the heating effect of the terminal can be also ensured,thus the proposed method possesses good economic efficiency and can provide a reference for electric heating planning.