In sometimes, relaying protection or stability control measures operate correctly, but power grids will lose its stability. A wide area protection system to meet the requirements of "Three Defensive Lines" is proposed in this thesis.
随着电网规模的扩大,互联趋势的加强,基于本地量的保护和自动控制判据不能全面的反映系统的运行状态,可能出现保护和安全自动装置动作不恰当的情况,“三道防线”中的每道防线基本处于“各自为政”的状态,相互之间缺乏必要的配合与协调,有时会导致事故范围扩大。
参考来源 - 广域保护系统结构及故障判别算法研究Centered in water resources protection, to build three defensive lines (eco-restoration, eco-management and eco-protection) and eco-clean minor watersheds has become the new concept in the minor watershed management in Beijing.
以水源保护为中心，构筑“生态修复、生态治理、生态保护”三道防线，建设生态型清洁小流域的水源保护的思路，是北京市小流域治理的新理念。
参考来源 - 北京市生态清洁小流域综合治理研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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