CAJ | 학술논문

文章深入研究了故障发生时电磁环网系统中线路保护的动作行为，当平行双回线路在强磁弱电联系运行方式下，一回线路末端发生接地故障时，非故障线路纵联零序方向保护会误动，而纵联负序方向保护不会误动。文章提出了一种新的基于负序方向元件综合判据，针对零序方向保护容易误动的情况，对新型的负序方向元件作为纵联方向保护进行了研究。
문장심입연구료고장발생시전자배망계통중선로보호적동작행위，당평행쌍회선로재강자약전련계운행방식하，일회선로말단발생접지고장시，비고장선로종련령서방향보호회오동，이종련부서방향보호불회오동。문장제출료일충신적기우부서방향원건종합판거，침대령서방향보호용역오동적정황，대신형적부서방향원건작위종련방향보호진행료연구。
The paper makes a deep research on the line relay operation behavior when the electromagnetic loop network system has the fault. When a ground fault occurs on the parallel double-circuit lines under the strong-magnetic and weak-current operation condition, the pilot zero sequence directional protection of the non-fault line may mal-function, while the pilot negative sequence directional protection is not so. To avoid the mal-function of the zero sequence, a new comprehensive criterion based on negative sequence directional element is proposed, a new pilot negative sequence directional protection scheme is also researched in this paper.