以电流上升率保护和电流增量保护为基础，提出了一种新型的DDL保护方法及整定原则，并推导出了完整的动作方程。
Based on the current-rising-rate protection and current increment protection, the principle of DDL protection as well as its action equation is presented.
以电流上升率保护和电流增量保护为基础，提出了一种新型的DDL保护方法及整定原则，并推导出了完整的动作方程。
Based on the current-rising-rate protection and current increment protection, the principle of DDL protection as well as its action equation is presented.
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