基于蓄热水箱温度可行域模糊确定的电锅炉优化调度方法

Optimal Scheduling Method of Electric Boiler Based on Fuzzy Determination of Temperature Feasible Region of Hot Water Storage Tank

电锅炉作为高比例可再生能源电力系统中重要的负荷侧调节资源,其蓄热水箱温度可行域的确定不仅影响系统安全性,而且与风电消纳密切相关,然而两者之间缺乏精确的计算模型。提出一种采用模糊控制算法根据蓄热水箱初始温度及风电情况对蓄热水箱温度可行域进行模糊确定,进而进行电锅炉系统优化调度的方法。首先,建立了电锅炉系统中不同运行工况下蓄热水箱、热网以及建筑的特性模型。其次利用模糊控制算法,结合蓄热水箱初始温度及风电功率大于电负荷的时长,计算每日的蓄热水箱温度上限,进而建立电锅炉系统优化调度模型。最后以长春市某教育局微站所用电锅炉系统构建仿真算例,验证所提方法的有效性。算例结果表明,所提方法能够调动建筑负荷侧资源参与风电消纳,降低电锅炉系统结垢风险,减小系统运行成本。

As an essential load-side regulation resource in a high proportion of renewable energy power systems,determining the feasible region of the thermal storage tank temperature of an electric boiler affects system security and is closely related to wind power consumption.However,accurate calculation models for these two factors are lacking.This study proposes a method for fuzzy determination of the feasible region of the water tank temperature and optimal scheduling of the electric boiler system.First,the characteristic models of the hot water storage tank,heating network,and building under different operating conditions in an electric boiler system were established.Second,using the fuzzy control algorithm combined with the initial temperature of the hot water storage tank and the period during which the wind power was more significant than the electrical load,the daily upper temperature limit of the hot water storage tank was calculated,and the optimal scheduling model of the electric boiler system was established.Finally,a simulation example is constructed to verify the effectiveness of the proposed method based on the electric boiler system used in the microstation of an education bureau in Changchun City.The results show that the proposed method can mobilize the building load side to participate in wind power consumption,reduce the risk of fouling of the electric boiler system,and reduce the operating cost of the system.