| 引用本文: | 郭培育,邰能灵,于仲安,等.T型同杆四回线线路故障选线新方法[J].电力系统保护与控制,2013,41(18):49-55.[点击复制] |
| GUO Pei-yu,TAI Neng-ling,YU Zhong-an,et al.A new method of fault line selection for teed circuits with four-parallel transmission lines on the same tower[J].Power System Protection and Control,2013,41(18):49-55[点击复制] |
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| 摘要: |
| 对由同杆四回线与同杆双回线构成的T型同杆四回线的故障选线进行了研究，提出一种先判断故障侧并识别故障侧支路的故障选线方法。首先对同杆四回线电路部分进行解耦，分别得到两端的反序电流之间的关系。基于此电流关系判断出故障侧，从而可以迅速确定故障发生的区域。在此基础上，引入正序电压差参数，实现对故障线路的进一步的选线。理论分析及EMTP仿真验证了所提方法的正确性，且选线精度高。 |
| 关键词: T型同杆四回线 故障选线 反序电流 电压差 |
| DOI：10.7667/j.issn.1674-3415.2013.18.008 |
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| 基金项目:国家自然科学基金资助项目（51177066） |
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| A new method of fault line selection for teed circuits with four-parallel transmission lines on the same tower |
| GUO Pei-yu1,TAI Neng-ling1,YU Zhong-an1,FAN Chun-ju2 |
| () |
| Abstract: |
| Teed circuits with four-parallel lines on the same tower consist of four-parallel lines on the same tower and quadruple-lines on the same tower. After analyzing the fault line selection, a new method is proposed. The fault region is determined at first, and then the specific fault branch is identified. The mutual electromagnetic effect between four-parallel transmission lines is decoupled to obtain the relationship between the inverted-sequence current of two power source sides. According to that, the fault side is identified and the fault area can be determined quickly. The positive-sequence voltage difference is introduced to detect the fault branch precisely. Both a theoretical analysis and EMTP simulation results show that the method is correct and has high precision. |
| Key words: teed circuits with four-parallel lines on the same tower fault line selection inverted-sequence current voltage difference |
