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分析了微机型输电线路保护中方向性四边形阻抗元件在保护装置正反向出口附近发生短路时存在的问题,提出了一种解决问题的有效方法,并给出了相应的保护算法。
The problems existed when the directional quadrilateral impedance element in the microcomputer transmission line protection is short circuited near the positive and negative outlet of the protection device are analyzed. An effective method to solve the problem is proposed, and the corresponding protection algorithm is given.