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考虑恢复过程的电力系统分区方法研究

发布时间:2018-05-29 04:40

  本文选题:分区 + 并行恢复 ; 参考:《南京理工大学》2017年硕士论文


【摘要】:由于经济和技术等各方面条件的限制,大停电事故很难完全避免。其一旦发生,将会对社会造成巨大影响。对于存在多个具备自启动能力电源的停电电网,如果可以利用多个黑启动电源对系统进行分区后并行恢复,就可以加快黑启动进程,减少停电损失。现有的电网分区方法,主要关注电网内部拓扑特性,忽略了分区结果对实际恢复的影响。这不仅会导致分区之间的恢复时间存在较大差异,先完成恢复的分区不得不等待较长时间后才能并网,黑启动功率无法被充分利用;同时由于很难综合考虑机组和负荷的恢复特性等因素,其离分区恢复的实际要求仍然存在一定距离。结构上的平衡并不能保证恢复的高效,黑启动效率有待进一步提高。因此,进行考虑恢复过程的电力系统分区方法的研究具有重要意义。本文对考虑恢复过程的电力系统分区优化问题进行了研究,主要完成了以下工作:第一,分析现有基于网路拓扑特性的电力系统分区方法。通过对"凝聚算法"和"分裂算法"的研究,讨论分区决策时不考虑恢复过程的不足,阐述本文研究的必要性。第二,建立考虑恢复过程的电力系统分区优化模型。以整个电网恢复期间全网负荷损失量最小为优化目标,综合考虑网络平衡等约束,确保系统的安全与稳定。第三,采用两层规划方法求解上述优化模型。上层规划基于黑启动分区原则,采用割集方法形成电力系统的可行分区方案,然后基于序优化理论对分区方案进行快速筛选,确保以足够高的概率得到足够好的结果。下层规划以各分区内部负荷损失量最小为目标优化各方案的发电机和负荷的启动顺序,并将恢复信息反馈到上层。第四,以IEEE-39标准测试系统和江苏某地区实际系统为例验证本文所述算法的有效性。
[Abstract]:Due to economic and technical constraints, blackouts are difficult to avoid. Once it occurs, it will have a great impact on society. For power outages with self-starting power supply, if multiple black-start power sources can be used to recover the system after partitioning, the black-start process can be accelerated and the blackout loss can be reduced. The existing methods mainly focus on the internal topological characteristics of the power grid and ignore the effect of the partition results on the actual recovery. This will not only lead to greater differences in recovery time between partitions, the first to complete the recovery of the partition has to wait a long time before the grid, black start power can not be fully utilized; At the same time, because it is difficult to consider the recovery characteristics of units and loads, there is still a certain distance from the actual requirements of zone recovery. The structural balance can not guarantee the recovery efficiency, and the black-start efficiency needs to be further improved. Therefore, it is of great significance to study the power system partition method considering the recovery process. In this paper, the power system partition optimization problem considering the restoration process is studied. The main work is as follows: first, the existing power system partition methods based on the network topology characteristics are analyzed. Based on the study of "condensing algorithm" and "splitting algorithm", this paper discusses the deficiency of restoration process in partition decision making, and expounds the necessity of this study. Secondly, the district optimization model of power system considering restoration process is established. Taking the minimum load loss of the whole network during the whole restoration period as the optimization objective, considering the constraints of network balance and other constraints, the security and stability of the system are ensured. Thirdly, two-level programming method is used to solve the above optimization model. The upper level planning is based on the black start partition principle and the cut set method is used to form the feasible partition scheme of the power system. Then based on the order optimization theory the partition scheme is quickly screened to ensure that the high enough probability is enough to obtain good results. The lower level program optimizes the starting order of generators and loads of each scheme with the objective of minimizing the internal load loss of each district, and feedback the recovery information to the upper layer. Fourthly, the effectiveness of the proposed algorithm is verified by the IEEE-39 standard test system and the actual system in a certain area of Jiangsu Province.
【学位授予单位】:南京理工大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:TM711;TM73

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