| 基波电流注入法实现的单相接地选线 |
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| 引用本文： | 张朝平,周有庆,王娜. 基波电流注入法实现的单相接地选线[J]. 电力系统保护与控制, 2006, 34(9): 70-72 |
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| 作者姓名： | 张朝平 周有庆 王娜 |
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| 作者单位： | 湖南大学电气与信息工程学院 湖南长沙410012 |
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| 摘 要： | 由于网络结构、天气变化以及补偿装置的投入等因素,致使小电流接地系统的单相接地选线变得特别复杂,提出了一个通过接地变或消弧线圈副绕组注入一个基波电流信号的方法,使接地线路得到的零序电流恒定,使零序过流判据生效,解决了接地选线正确性低的难题。
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| 关 键 词： | 接地选线 小电流接地系统 信号注入法 |
| 文章编号： | 1003-4897(2006)09-0070-03 |
| 收稿时间： | 2005-10-21 |
| 修稿时间： | 2006-02-20 |
Single-phase earthing line selection based on first-harmonic current injection |
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| ZHANG Chao-ping, ZHOU You-qing, WANG Na. Single-phase earthing line selection based on first-harmonic current injection[J]. Power System Protection and Control, 2006, 34(9): 70-72 |
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| Authors: | ZHANG Chao-ping ZHOU You-qing WANG Na |
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| Affiliation: | College of Electrical and Information Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | Because of the influence of network structure,climate and introducation of compensating equipment,the single-phase earthing line selection of system with ungrounded neutral became more complicated.In this paper,the grounded zero sequence current is to be constant through first-harmonic current injection with earthing transformer or auxiliary winding of arc suppression coil.Through first-harmonic current injection,the criterion of zero sequence overcurrent becomes effective to solve the difficult problem of the low correctness of earthing line selection. |
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| Keywords: | earthing line selection power system with neutral ungrounded signal injection method |
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