考虑暂态稳定约束的最优紧急控制策略

doi:10.3969/j.issn.1000-7229.2015.10.018

摘要/Abstract

摘要：

随着电力市场的深化，用户的可靠性得到重视，为充分体现用户对可靠性的不同要求，将用户的停电成本作为经济性指标，加入优化目标函数作统一优化的紧急控制策略，得到广泛应用。然而，这些决策模型中没有考虑系统的暂态稳定性，这就使得在执行完发电机再调度和切负荷操作后，系统可能无法再次承受故障而不发生暂态失稳。针对这种不足，提出了一种考虑暂态稳定约束的最优紧急控制决策模型，在该模型中加入了表示系统在新的运行点满足暂态稳定的相关约束，因此，发电机再调度以及切负荷等操作完成后，系统仍然能保持暂态稳定性。最后，以IEEE-RBTS的6节点系统和新英格兰39节点系统为算例，对所提出的策略作出具体阐述，并比较该方法与不考虑暂态稳定约束的算法在结果上的差别。

关键词: 紧急控制, 缺电成本, 最优模型, 电力系统暂态稳定

Abstract:

With the deepening of the power market, the users reliability has been paid much attention. In order to fully reflect the different reliability requirements of users, the emergency control strategies which take the power outage cost of users as economic index in optimization objective function have been widely used. However, these decision models do not consider the transient stability of the system, so the system may be unable to withstand failure again and cause transient instability after the execution of generator re-scheduling and load shedding. In view of this problem, this paper proposed an optimal emergency control strategy with considering transient stability constrains. The relevant constraints were used in this model could indicate that the system satisfied the transient stability at the new operating point. Therefore, the system could still maintain transient stability after the execution of generator re-scheduling and load shedding. Finally, taking IEEE-RBTS 6-nodes system and new-England 39-nodes system as example, the proposed strategy was described in detail, and its result was compared with that of the strategy without considering transient stability constrains.　

Key words: emergency control, power outage cost, optimal model, transient stability of power system

中图分类号:

TM 715

邵常政，丁一，宋永华. 考虑暂态稳定约束的最优紧急控制策略[J]. 电力建设, 2015, 36(10): 118-122.

SHAO Changzheng, DING Yi, SONG Yonghua . Optimal Emergency Control Strategy Considering Transient Stability Constrains[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(10): 118-122.

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