求翻译：进一步分析各ATC值对应的失稳故障集可以发现：(a)当断面1的可用输电能力低于437MW时，系统主要受a1站相关的送出线路故障影响。为了提高ATC，本文加入相应的安全稳定控制措施，在该类故障发生时切除B区某发电机，对断面1重新计算，当功率增加437MW后，系统仍能保持稳定。(b)断面1的ATC在437MW到N-1热稳极限477MW之间时，主要受A区中部某变电站的影响，该站是区内多条传输通道的主要集散点，成为全网N-1热稳定和暂态稳定最为薄弱的环节，因此断面1的可用输电能力难以进一步提高。是什么意思？

Further analysis of the ATC value of the corresponding unstable fault set can be found: (a) when section 1 of the available transmission capacity of less than 437MW, the system is mainly related to the sending station by the a1 line failure. In order to improve the ATC, this added safety and stabili

Further analysis of the failures who lost ATC value corresponding to the Group can be found 1 sessile: (a) When the available transmission capacity is lower than 437 MW system, mainly related to the site by sending a 1 line fault. In order to improve this article ATC, adherence to the corresponding

Further analysis of ATC value of buckling failure sets can be found: (a) when the section 1 of the available transmission capacity is lower than 437MW, the system mainly under the influence of A1 station associated transmission line fault. In order to improve ATC, this article isn't appropriate secu