分析了微机ul P失磁继电器的准确动作方程及整定计算方法，弥补了某些文献的不妥或不足之处。
Accurate operation equation and setting calculation on microprocessor based UL-P loss of excitation relay are analyzed in this paper which has supplied a deficiency in some works or papers.
通过对SCOTT变压器在多种运行状态下的仿真计算，检验了该保护原理、动作方程、动作特性和整定原则的正确性。
The simulated results of the SCOTT transformer in different running states confirm the correctness of the protection principle, operation equations, operation characteristics and setting rules.
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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