| 引用本文: | 张庆超,易乐钊.基于微扰法的不换位输电线路相模变换[J].电力系统保护与控制,2017,45(10):18-23. |
| ZHANG Qingchao,YI Lezhao.Phase-mode transformation of un-transposed transmission lines based on perturbation method[J].Power System Protection and Control,2017,45(10):18-23 |
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| 摘要: |
| 传统的对称分量法适用于理想换位的三相对称输电线路，对于不对称程度较大的不换位单回输电线路，其结果误差较大。为获得更精确的结果，采用模分量法，该方法的关键是求解相模变换矩阵。考虑了架空地线对不换位线路阻抗矩阵的影响，并运用微扰理论，通过构造因不换位造成的阻抗矩阵微扰量，可以求解出不同精度的相模变换矩阵。将求得的变换矩阵用于模分量理论进行故障分析，所得的计算结果与实际结果相比误差很小，验证了该方法的可行性。 |
| 关键词: 不换位输电线路 相模变换 模分量法 微扰法 故障测距 |
| DOI：10.7667/PSPC160756 |
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| Phase-mode transformation of un-transposed transmission lines based on perturbation method |
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ZHANG Qingchao,YI Lezhao
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(School of Electrical Engineering & Automation, Tianjin University, Tianjin 300072, China)
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| Abstract: |
| Traditional symmetrical component method only works under the condition of symmetrical parameters of transposed transmission lines. The error can’t be ignored if the transmission lines are un-transposed single-circuit transmission lines. The modal analysis can be used for better results. The key of the modal analysis is to get a phase-mode transformation matrix. This paper considers the effect of the existence of the earth wire and uses perturbation theory to get phase mode transformation matrix of different precisions by building a perturbation made by un-transpose. Applying the obtained matrix to the theory of modal analysis, it finds that the calculated results have small error compared with the real results, verifying the feasibility of the method. |
| Key words: un-transposed transmission lines phase-mode transformation modal analysis perturbation theory fault location |
