| 引用本文: | 王海军,周全,梁远升,李海锋,王钢.基于电压突变量的同塔双回直流输电线路故障选线方法[J].电力系统保护与控制,2015,43(7):23-29.[点击复制] |
| WANG Haijun,ZHOU Quan,LIANG Yuansheng,LI Haifeng,WANG Gang.Fault line selection of double-circuit HVDC transmission line based on voltage variation[J].Power System Protection and Control,2015,43(7):23-29[点击复制] |
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| 摘要: |
| 同塔双回直流线路极线间复杂的电磁耦合关系，增加了其故障极线识别的难度。基于平行四线系统解耦理论，对同塔双回直流线路电压量进行解耦分析，提取出相互独立的一个同向量与三个环流量电压。在此基础上详细分析了同塔双回直流输电线路在不同故障类型以及不同极线故障情况下的同向与环流电压突变量的极性和幅值大小特征，进而利用同向与环流电压突变量极性和幅值大小的差异及相互间的关联关系，提出了一种同塔双回直流输电线路故障选线方法。基于实际同塔双回直流输电系统的PSCAD/EMTDC大量仿真结果表明，该方法准确可靠，且不受过渡电阻影响。 |
| 关键词: 同塔双回输电线路 故障分析 故障选线 电压突变量 |
| DOI：10.7667/j.issn.1674-3415.2015.07.004 |
| 投稿时间：2014-06-16修订日期：2014-07-14 |
| 基金项目:国家自然科学基金项目(51007024,51307065)；中央高校基本科研业务费专项资金(2013ZZ028) |
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| Fault line selection of double-circuit HVDC transmission line based on voltage variation |
| WANG Haijun,ZHOU Quan,LIANG Yuansheng,LI Haifeng,WANG Gang |
| (Maintenance & Test Center, CSG EHV Power Transmission Company, Guangzhou 510663, China;School of
Electric Power, South China University of Technology, Guangzhou 510640, China) |
| Abstract: |
| The complex electromagnetic coupling between polars of double-circuit HVDC transmission line increases the difficulty of fault line selection. According to the decoupling theory of four-parallel transmission lines on the same tower, the voltage variation of double-circuit HVDC transmission line is transformed into four separate voltage components: a ground mode component and three line mode components. Further, the transformation is employed to analyze the characteristics of ground mode component and line mode components of voltage variation under different kinds of fault. Thereby a method for fault line selection of double-circuit HVDC transmission line is proposed based on the amplitude and polarity of ground mode component and line mode components of voltage variation. Finally, the simulation results of a double-circuit HVDC system model based on PSCAD/EMTDC show that the proposed method is effective and immune to the fault resistance. |
| Key words: double-circuit HVDC transmission line fault analysis fault line selection voltage variation |
