| 引用本文: | 于仲安,程明钊,郭培育,等.一侧同杆四回线与两侧同杆双回线构成的T型输电线路
故障测距新方法[J].电力系统保护与控制,2014,42(15):8-14. |
| YU Zhong-an,CHENG Ming-zhao,GUO Pei-yu,et al.A new fault locating of T-type transmission line consisting of four parallel-line and double circuit[J].Power System Protection and Control,2014,42(15):8-14 |
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| 摘要: |
| 通过深入研究同杆四回线与双回线构成的混合输电线路的特点，提出了相应的反序正序网络。在此基础上，综合反序正序电流，再利用故障支路的母线处始端推算到故障点的反序正序电压与从T支节点处推算到故障点的反序正序电压相等的关系得出测距方程，基于方程的解同时进行故障侧判断和测距。大量的PSCAD/EMTDC仿真结果验证了新方案的正确性及精确性，并且该算法的精度不受故障类型、过渡电阻、系统运行方式和系统阻抗等因素的影响。 |
| 关键词: 同杆四回线 同杆双回线 反序电流 混合线路 故障测距 |
| DOI：10.7667/j.issn.1674-3415.2014.15.002 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51177066；51377104) |
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| A new fault locating of T-type transmission line consisting of four parallel-line and double circuit |
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YU Zhong-an1, CHENG Ming-zhao1, GUO Pei-yu1, TAI Neng-ling2
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1.School of Electrical Engineering and Automation, Jiangxi University of Science and Technology, Ganzhou 341000, China;2.School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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| Abstract: |
| Based on the characteristics of mixed lines composed by four-circuit lines and double-circuit lines on the same tower, the corresponding inverted-sequence positive sequence networks are proposed. on the basis, this paper combines with negative current and positive current and uses the relationship that the negative and positive voltage from bus beginning terminal of fault branch to fault point is equal to the voltage from the T branch node to fault point to derive the fault location equation. According to the solution of the equation, its fault side and fault locating are detected simultaneously. Results of PSCAD/EMTDC simulation verify that the new scheme is accurate and not influenced by fault type, transition resistance, system operating mode and other factors on locating precision. |
| Key words: four parallel-line on same tower double-circuit line on same tower inverted-sequence current mixed lines fault locating |
