Based on this,a coordinative UFLS for the interconnected system is provided which is suitable not only for the varieth interconnection modes but also for each individual system in islanding operation.

• 在此基础上提出了我国东北-华北-华中跨大区互联电网统一协调的低频自动减负荷方案，该方案不但适用于各种联网模式，也适用于各种孤网模式。