| 距离保护在小电流接地系统中的应用新判据 |
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| 引用本文： | 毛幸远.距离保护在小电流接地系统中的应用新判据[J].湖南工业职业技术学院学报,2010,10(5):16-17,72. |
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| 作者姓名： | 毛幸远 |
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| 作者单位： | 福建水利电力职业技术学院,福建永安366000 |
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| 摘 要： | 在小电流接地系统当发生异地两点接地时,目前的电流保护无法实现100%有选择性动作,若在此中情况下采用距离保护,在并列运行线路中通过采用自适应的逻辑判别方法实现先切除不重要用户及只切除一条线路;串联线路中通过在电源线、供电线(串联线路)上,用相间距离Ⅰ段动作后辅以接地距离元件的测量判别,或上、下线路间进行数据通信的方式可以实现只切除供电线路,从面实现100%有选择性动作。
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| 关 键 词： | 距离保护 小电流接地系统 选择性 |
New Criterion of Distance Protection Used in Little Current Grounding Power Net |
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| MAO Xing'Yuan.New Criterion of Distance Protection Used in Little Current Grounding Power Net[J].Journal of Hunan Industry Polytechnic,2010,10(5):16-17,72. |
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| Authors: | MAO Xing'Yuan |
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| Affiliation: | MAO Xing＇Yuan(Fujian Water Conservancy and Power Professional Technical College,Yong＇an 366000,Fujian) |
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| Abstract: | Current protection device at present can not exactly operate when earthing occurs in different places in little current gorunding power net.Facing the situation,distance protection is adopted.Preferentially cut off the unimportant power supply or only one line via self-adapted logical judgement in paratactic lines.Only cut off feed line via distance measurement and communication in serial lines.Thus can realize the selectivity. |
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| Keywords: | distance protection little current grounding power net selectivity |
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