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arXiv 1703.05232eess.SYcs.SY
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电力系统中恶性连锁故障建模与辨识

Modeling and Identification of Worst-Case Cascading Failures in Power Systems

Nanyang Technological University(南洋理工大学);Singapore-ETH Centre(新加坡-苏黎世联邦理工学院中心)

Chao Zhai, Hehong Zhang, Gaoxi Xiao, Tso-Chien Pan

AI总结:

本文提出基于最优控制理论的电力系统连锁故障建模方法,通过直流功率流方程计算支路传输功率,利用迭代搜索算法寻找导致最恶劣连锁故障的初始扰动,通过IEEE 9节点和14节点系统验证了方法的有效性。

摘要:

电力系统中的连锁故障通常由电气元件的初始扰动或故障引发,随后人类操作错误紧随其后。系统追踪连锁故障源仍是一个巨大挑战。本文开发了一个数学模型来描述电力网络中输电线路的连锁动态。特别是,采用直流功率流方程计算支路传输功率。将元件上的扰动视为控制输入,将确定导致电网连锁崩溃的初始扰动问题建模为最优控制理论框架下的问题,并通过求解代数方程组获得选定支路的扰动或故障幅度。此外,提出了一种迭代搜索算法来寻找导致最恶劣连锁故障的最优解。理论分析保证了迭代搜索算法的渐近收敛性。最后,通过IEEE 9节点系统和IEEE 14节点系统进行数值模拟以验证所提出方法的有效性。

英文摘要:

Cascading failures in power systems normally occur as a result of initial disturbance or faults on electrical elements, closely followed by errors of human operators. It remains a great challenge to systematically trace the source of cascading failures in power systems. In this paper, we develop a mathematical model to describe the cascading dynamics of transmission lines in power networks. In particular, the direct current (DC) power flow equation is employed to calculate the transmission power on the branches. By regarding the disturbances on the elements as the control inputs, we formulate the problem of determining the initial disturbances causing the cascading blackout of power grids in the framework of optimal control theory, and the magnitude of disturbances or faults on the selected branch can be obtained by solving the system of algebraic equations. Moreover, an iterative search algorithm is proposed to look for the optimal solution leading to the worst case of cascading failures. Theoretical analysis guarantees the asymptotic convergence of the iterative search algorithm. Finally, numerical simulations are carried out in IEEE 9 Bus System and IEEE 14 Bus System to validate the proposed approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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