| 双回输电线路自适应距离保护 |
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| 引用本文： | 张华中,王维庆,朱玲玲,孔令凯,周培毅,梁思聪.双回输电线路自适应距离保护[J].电网技术,2009(18). |
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| 作者姓名： | 张华中 王维庆 朱玲玲 孔令凯 周培毅 梁思聪 |
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| 作者单位： | 新疆大学电气工程学院;许继电气股份有限公司; |
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| 基金项目： | 国家自然科学基金项目(50867004); 自治区高技术研究发展计划项目(200614118)~~ |
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| 摘 要： | 平行双回线结构的特殊性以及零序互感等因素造成距离保护继电器耐受过渡电阻的能力较弱,严重影响继电器的性能,传统的距离保护方法难以满足高压平行双回线的要求。该文针对双回输电线路的单回线路单相接地故障,提出双回输电线路的自适应距离保护方法,该方法借助正、负、零序电流的权重系数和传统距离保护的测量阻抗,计算出保护的附加测量阻抗,对传统距离保护的计算结果进行修正,并给出正、负分支系数相角的估算方法。仿真结果证明这种自适应距离保护方法能有效防止保护的超越和拒动。
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| 关 键 词： | 自适应距离保护 双回输电线路 权重系数 过渡电阻 |
Adaptive Distance Protection of Double-Circuit Transmission Line |
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| ZHANG Hua-zhong,WANG Wei-qing,ZHU Ling-ling,KONG Ling-kai,ZHOU Pei-yi,LIANG Si-cong.Adaptive Distance Protection of Double-Circuit Transmission Line[J].Power System Technology,2009(18). |
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| Authors: | ZHANG Hua-zhong WANG Wei-qing ZHU Ling-ling KONG Ling-kai ZHOU Pei-yi LIANG Si-cong |
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| Affiliation: | ZHANG Hua-zhong1,WANG Wei-qing1,ZHU Ling-ling1,KONG Ling-kai2,ZHOU Pei-yi1,LIANG Si-cong1 (1.School of Electrical Engineering,Xinjiang University,Urumqi 830000,Xinjiang Uygur Autonomous Region,China,2.XJ Electric Co.,Ltd.,Xuchang 461000,Henan Province,China) |
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| Abstract: | The structural particularity and zero-sequence mutual inductance of parallel double-circuit transmission line make the ability of distance protection to withstand transition resistance weaker,and it is difficult for traditional distance protection to meet the demand of high-voltage parallel double-circuit transmission line,so the performance of distance protection is seriously affected. In this paper,for the single-phase earth fault occurred in one circuit of the double-circuit transmission line an adaptive... |
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| Keywords: | adaptive distance protection parallel double-circuit transmission line weight coefficients transition resistance |
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