摘要
针对质子交换膜燃料电池和电解槽的热电联供特性,为避免氢能系统的热能浪费并进一步提高氢能系统的效率,搭建了一种考虑氢能系统的热电联供型光伏/风机/燃料电池/蓄电池/电锅炉/燃气锅炉微电网系统,提出一种包括日前调度与实时优化的两阶段优化调度方法.所建系统考虑了电氢转换时的余热回收,将氢能系统作为热电氢耦合设备,实现了电、热、氢能的协调利用与相互转换,有效提高了能量利用率.在第一阶段调度中,根据日前的风光发电出力及负荷需求预测,以微电网整体运行成本最小为目标,采用混合整数线性规划方法实现日前最优全局调度;在第二阶段调度中,根据超短期预测结果,使用模型预测控制嵌入混合整数二次规划算法,减小预测误差带来的经济性影响.最后,通过冬、夏及过渡季典型日算例可知,本文所提出的两阶段调度方法在3种季节典型日的总成本较日前全局最优调度分别降低了3.24%、0.76%、1.66%;通过在不同场景下对本文所提方法进行仿真验证,相较于不考虑能量耦合的基础场景,考虑热电耦合系统和热电氢耦合系统时,优化调度的总成本和污染气体治理成本分别降低了15.58%、24.93%.结果表明:本文所提方法具有一定的实时性及通用性,能够满足微网内热电负荷需求,实现稳定独立运行,改善系统的运行经济性与环保性.
According to the cogeneration characteristics of proton exchange membrane fuel cell and electrolyzer,in order to avoid the waste of heat energy in the hydrogen energy system and further improve the system efficiency, a combined heat–power microgrid system for photovoltaic, wind turbines, fuel cells, batteries, electric boilers, and gas boilers is built by incorporating hydrogen energy system, and a two-stage optimal dispathing method is proposed, including day-ahead scheduling and real-time optimization. The proposed system takes into account the waste heat recovery during the electricity-to-hydrogen conversion, and uses the hydrogen energy system as a thermal-electricity-hydrogen coupling equipment to realize the coordinated utilization and mutual conversion of electricity, heat, and hydrogen energy, and effectively improves the energy utilization rate. In the first stage of scheduling, according to the forecast of the wind-solar power system output and load demand in the day before, the mixed integer linear programming method is used to achieve the day-ahead optimal global schedule with the goal of minimizing the total operation cost of the microgrid. In the second stage of scheduling,based on the results of ultra-short-term predictions, the mixed integer quadratic programming algorithm is embedded in the model predictive control to lessen the economic influence from the prediction errors. Finally,through calculation examples of typical days in winter, summer and transitional seasons, compared with the dayahead global optimal scheduling, the total cost of the two-stage scheduling method is reduced by 3.24%, 0.76%and 1.66%, respectively, in three types of seasonal days. Through the proposed method are simulated and verified in different scenarios, compared with the basic scenario without energy coupling, in the cases of involving the thermoelectric hydrogen coupling system and thermoelectric coupling system, the total cost and cost of pollution gas treatment with optimal scheduling are reduced by 15.58% and 24
作者
李奇
邹雪俐
蒲雨辰
陈维荣
赵淑丹
LI Qi;ZOU Xueli;PU Yuchen;CHEN Weirong;ZHAO Shudan(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China;Linfen Power Supply Company,State Grid Shanxi Electric Power Company,Linfen 041000,China)
出处
《西南交通大学学报》
EI
CSCD
北大核心
2023年第1期9-21,共13页
Journal of Southwest Jiaotong University
基金
国家自然科学基金(51977181)
霍英东教育基金会高等院校青年教师基金(171104)。
关键词
氢能
热电联供型微电网
优化调度
hydrogen energy
combined heat-power microgrid
optimal scheduling
