| 引用本文: | 齐郑,饶志,杨琳琳.OPGW架空输电系统任一点接地短路电流分布的研究[J].电力系统保护与控制,2016,44(2):86-94. |
| QI Zheng,RAO Zhi,YANG Linlin.Research of current distribution between OPGWs in overhead transmission system with grounding fault at any point[J].Power System Protection and Control,2016,44(2):86-94 |
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| 摘要: |
| 架空输电线路发生接地短路时，短路电流在光纤复合架空地线(OPGW)上的分布对电力系统有重要影响。传统计算OPGW线上短路电流的方法大多采用工程简化计算和基于序分量法的计算，并且只考虑接地短路发生在杆塔处的情形，计算结果过于粗糙。为此提出了基于相分量模型对全线任一点接地短路电流计算的方法。分别提出接地短路发生在杆塔处和杆塔间不同的数学模型，进一步求解相导线和OPGW每一级档距上的电流。数值算例验证了在杆塔处接地短路分流模型的正确性，杆塔处接地短路的分流结果进一步验证了杆塔间接地短路分流模型的正确性，并在实际工程中进行了应用。对于复杂的OPGW架空输电系统，基于相分量模型的计算方法能够准确计算全线任一点发生接地短路时，OPGW线上短路电流的分布情况。 |
| 关键词: 光纤复合架空地线 架空输电线路 杆塔 任一点接地 短路电流分布 |
| DOI：10.7667/j.issn.1674-3415.2016.02.012 |
| 分类号: |
| 基金项目:国家自然科学基金项目(51277066) |
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| Research of current distribution between OPGWs in overhead transmission system with grounding fault at any point |
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QI Zheng1, RAO Zhi1, YANG Linlin2
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1.School of Electric and Electronic Engineering, North China Electric Power University, Beijing 102206, China;2.State Grid Beijing Electric Power Company, Beijing 100031, China
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| Abstract: |
| Fault currents distributed on optical composite overhead grounding wire (OPGW) have a significant influence on the safe operation of the overhead transmission system. Traditional calculation methods include simplified calculation method and sequence component method. These two only focus on the grounding fault at one of the power towers. Owing to much ignorance, the calculation results are too simplified and not reliable. To solve these problems, this paper discusses the calculation of the grounding fault current distributed on OPGW at any point of the transmission line based on phase component method. The whole line can be divided into different sections by each power tower. Separately, two mathematic modulations are built when the grounding fault at tower and between towers. Numerical examples are applied to verify the correctness of theories of fault at the tower, and then the results are used to verify the correctness of fault between towers, finally applied into an actual project. In the complex overhead transmission system with OPGWs, phase component method proposed can accurately calculate the current distribution with grounding fault at any point of the line. |
| Key words: optical fiber composite overhead grounding wire overhead transmission line power tower grounding fault at any point fault current distribution |
