| 超高压输电线路对侧开关单相偷跳的处理策略 |
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| 引用本文： | 杜肖功,于涛,段玉倩,刘世明,刘凯. 超高压输电线路对侧开关单相偷跳的处理策略[J]. 电力系统保护与控制, 2005, 33(22): 31-34 |
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| 作者姓名： | 杜肖功 于涛 段玉倩 刘世明 刘凯 |
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| 作者单位： | 1.烟台东方电子信息产业股份有限公司，山东 烟台 264001;2.山东大学电气工程学院，山东 济南 250061 |
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| 摘 要： | 高压、超高压输电线路的开关为分相开关,当对侧开关单相偷跳后,在线路负荷比较重、同时重合闸动作时间比较长的情况下可能引发系统振荡。此时,虽然系统运行于非全相状态,而本侧的距离保护却不能正确识别,从而在启动后进入全相运行的故障处理模块,当振荡中心在保护范围内时,就可能引起距离保护误动。通过分析对侧开关单相偷跳后本侧距离保护感受到的电气量特征,提出了一种针对对侧线路开关单相偷跳的判据,解决了距离保护可能误动的问题。
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| 关 键 词： | 偷跳 距离保护 系统振荡 |
| 文章编号： | 1003-4897(2005)22-0026-04 |
| 收稿时间： | 2005-03-17 |
| 修稿时间： | 2005-04-20 |
A handling strategy for EHV transmission line protection after single-phase tripping of remote breaker |
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| DU Xiao-gong,YU Tao,DUAN Yu-qian,LIU Shi-ming, LIU Kai. A handling strategy for EHV transmission line protection after single-phase tripping of remote breaker[J]. Power System Protection and Control, 2005, 33(22): 31-34 |
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| Authors: | DU Xiao-gong YU Tao DUAN Yu-qian LIU Shi-ming LIU Kai |
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| Affiliation: | 1. Dongfang Electronic Information Co. ,Ltd, Yantai 264001, China; 2. School of Electrical Engineering, Shandong University, Jinan 250061, China |
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| Abstract: | HV and EHV transmission lines are equipped with split-phase breaker. If a longer reclosing time is setting in a heavy load line, the system may swing after the trip without fault of remote breaker. Although system is operating in a 2-phase state, the local distance protection can not identify it correctly. The normal fault processing program will be run after start-up, and distance protection may trip while oscillation center lies in its protection domain. By analyzing the electric quantities measured by local protection device, a criteflon is proposed to solve this maloperation with nice effect. |
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| Keywords: | trip without fault distance relay system swing |
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