| 平行双回线系统中线路纵联方向保护动作特性研究 |
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| 引用本文： | 项忠华,陈晓东,叶远波.平行双回线系统中线路纵联方向保护动作特性研究[J].安徽电气工程职业技术学院学报,2015(1):25-29. |
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| 作者姓名： | 项忠华 陈晓东 叶远波 |
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| 作者单位： | 国网宣城供电公司,安徽 宣城,242000;国网安徽省电力公司调度控制中心,安徽 合肥,230022 |
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| 摘 要： | 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。
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| 关 键 词： | 同杆多回线 强磁弱电 负序方向元件 线路保护 |
Action Characteristic of Transmission Line Pilot Protection in Parallel Double-Circuit Lines System |
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| XIANG Zhong-hua,CHEN Xiao-dong,YE Yuan-bo.Action Characteristic of Transmission Line Pilot Protection in Parallel Double-Circuit Lines System[J].Journal of Anhui Electrical Engineering Professional Technique College,2015(1):25-29. |
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| Authors: | XIANG Zhong-hua CHEN Xiao-dong YE Yuan-bo |
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| Affiliation: | XIANG Zhong-hua;CHEN Xiao-dong;YE Yuan-bo;State Grid Xuancheng Power Supply Company;Dispatch & Control Center,State Grid Anhui Electrical Power Corporation; |
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| Abstract: | 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. |
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| Keywords: | parallel double-circuit lines strong-magnetic and weak-current negative sequence directional element transmission line protection |
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