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songmai: 金币+100, 翻译EPI+1, ★★★★★最佳答案, 翻译的很好 谢谢大神 2016-03-03 21:17:01
近些年来，我国 输电网络 规模 越来越大，结构也 越来越 复杂，而在 全球范围内 由潮流转移 引起的 电力系统 大停电事故 频频发生。由于 故障等因素，某些 承担 重要负荷 关键线路 一旦被 切除，随之 引起的 潮流转移 与 后备保护 不合理动作的 连锁反应，极有 可能 引发系统的 连锁跳闸，继而 导致 大停电事故，给社会和经济 带来 难以估量的损失。针对 潮流转移 识别 线路 自适应后备保护，不仅 站在 电网整体的 视角上 对 易受潮流转移影响 的 关键线路 有效识别，还站在 继电保护 设计的 视角 对 线路过负荷 有效识别 并提高 后备保护的 抗 过渡电阻能力。因此 本课题 研究 对预防大停电事故 和 相关保护装置 可靠性 有重要 现实意义。
In recent years, China's electrical grid has gained the development of increasingly large scale and increasingly complex structure, however in the global view, large-scale blackout occurs frequently due to power flow transferring. Due to some fault factors, some critical lines which undertake important loads are cut, it will cause negative chain reactions such as power flow transferring and improper operation of backup protection, which will probably cause system cascading trips. thus leading to large-scale blackouts and bringing inestimable loss of socio-economy. Regarding adaptive backup protection for identification line of power flow transfer, it is suggested not only to effectively identify the critical lines that are vulnerable to power flow transferring in the perspective of overall power grid, but also to effectively identify the overload and increase the resistance capacity of backup protection to transition resistance in the perspective of protective relay design. Therefore, this research is of vital significance to the prevention of large-scale blackouts and to improvement of reliability of backup protection. |
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