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通过对大规模电网的失步仿真研究发现,当系统失步时失步机群可能会呈现为主要失步机群和次要失步机群2种失步模式。主要失步机群决定着整个大区电网的失步中心断面联络线,而次要失步机群不能决定整个大区电网的失步中心断面联络线。该现象将导致通过捕捉失步断面电压最低点(失步中心)寻找失步断面联络线的方法一般只能将主要失步机群分开,却未必能够将次要失步机群也合理分布到与之同调的机群之中。因此,工程中应结合系统离线仿真分析,尽可能对有可能成为次要失步模式的机组安装失步解列装置,以作为一种后备,防止次要失步模式机组扰动系统,造成事故扩大。
Through the simulation study on the out-of-synchronization of large-scale power grids, it is found that the out-of-step group may appear as two types of out-of-sync modes of the main out-of-step group and the second out-of-step group when the system loses synchronization. The main out-of-step aircraft group determines the out-of-step center of the regional power grid section of the contact line, and the secondary out-of-step aircraft group can not determine the entire regional power grid out-of-step center line of contact. This phenomenon will result in the search for the line of out-of-step cross-section by capturing the lowest point of the out-of-step cross-section (out-of-sync center), which generally separates the main out-of-step clusters but may not be able to reasonably distribute the secondary out-of-step clusters to Among the same cluster. Therefore, the project should be combined with off-line simulation analysis of the system, as far as possible to be likely to become a secondary mode out of sync unit installed stalling device, as a backup to prevent secondary synchronization mode unit disturbance system, causing the accident to expand .