基于事件建模的机组检修模型及其在电力系统中长期运行中的应用

Event-based Generation Maintenance Scheduling Model and Its Application in Mid/long-term Operation of Power Systems

发电机组检修计划是电力系统中长期运行的重要内容,对于维护设备安全运行、保障高比例新能源电力系统中长期电力电量平衡十分重要。由于检修持续时间、检修间隔时间等检修约束较为复杂,机组检修在建模中存在模型整数变量与约束条件数目多的难题,这增加了电力系统中长期运行的问题规模与求解难度。针对以上问题,该文提出基于事件建模的机组检修模型,能够用较少的变量完整地描述机组检修约束。在此基础上,计及机组检修约束、机组运行约束和系统运行约束,建立电力系统中长期运行模型。基于改编的IEEE-RTS79开展算例分析,验证提出的机组检修模型在电力系统中长期运行问题中的有效性,不仅求解效率提高,而且优化结果更好。

Generation maintenance scheduling is an important part of the mid/long-term operation of power systems.It is very critical for maintaining the safe operation of generators and mid/long-term electric power and energy balance of power systems with high proportion of renewable power.Due to the complexity of maintenance constraints such as the duration and time interval,numerous integer variables and constraints are needed for the generation maintenance scheduling model,resulting in difficulties in model solution.Aiming at the above problems,this paper proposes an event-based generation maintenance scheduling model,which can completely describe the generation maintenance scheduling constraints with fewer variables.Based on the generation maintenance scheduling model,a mid/long-term operation model of power systems is established considering the constraints of the generator and system operation.Case studies are carried out on the modified IEEE-RTS79.The results have verified the effectiveness of the proposed generation maintenance scheduling model in the mid/long-term operation of power systems,which not only enhances the solution efficiency,but also improves the optimization results.