Analysis and treatment of current unbalance abnormal situation of 750 kV double-circuit parallel transmission line
At present, the biggest problem faced by short-distance double-circuit parallel lines is the three-phase parameter asymmetry problem caused by non-transposition. This leads to three-phase current asymmetry, especially during heavy load performance is more prominent. Take a 750 kV double circuit para...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2023-01-01
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| Series: | International Journal of Metrology and Quality Engineering |
| Subjects: | |
| Online Access: | https://www.metrology-journal.org/articles/ijmqe/full_html/2023/01/ijmqe220016/ijmqe220016.html |
| _version_ | 1797835239011123200 |
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| author | Xie Yadi Li Shan Wang Chong Yang Dingqian |
| author_facet | Xie Yadi Li Shan Wang Chong Yang Dingqian |
| author_sort | Xie Yadi |
| collection | DOAJ |
| description | At present, the biggest problem faced by short-distance double-circuit parallel lines is the three-phase parameter asymmetry problem caused by non-transposition. This leads to three-phase current asymmetry, especially during heavy load performance is more prominent. Take a 750 kV double circuit parallel erection line in actual operation as an example, use EMTPE electromagnetic transient simulation software to simulate and analyze the current imbalance phenomenon. This paper studies the influence of phase sequence arrangement, distance between loops, distance between wires, line length, equivalent impedance, ground wire conditions and line power flow on current imbalance, and puts forward reasonable restraining measures. The simulation results show that when the line power flow is heavy, the double circuit lines are arranged in the same phase sequence and the distance between circuits is relatively short, there will be a large amplitude of zero sequence current on the line, mainly circulation current. If it is not suitable to adjust the protection measures, it can be considered to adjust the double-circuit lines to reverse phase sequence operation mode. The research results can provide reference for the engineering design of double-circuit parallel transmission lines. |
| first_indexed | 2024-04-09T14:50:55Z |
| format | Article |
| id | doaj.art-62d1a186a0dd4fbdad67d95861b07d4a |
| institution | Directory Open Access Journal |
| issn | 2107-6847 |
| language | English |
| last_indexed | 2024-04-09T14:50:55Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | International Journal of Metrology and Quality Engineering |
| spelling | doaj.art-62d1a186a0dd4fbdad67d95861b07d4a2023-05-02T09:33:00ZengEDP SciencesInternational Journal of Metrology and Quality Engineering2107-68472023-01-0114210.1051/ijmqe/2023001ijmqe220016Analysis and treatment of current unbalance abnormal situation of 750 kV double-circuit parallel transmission lineXie Yadihttps://orcid.org/0000-0002-0789-4110Li ShanWang ChongYang Dingqian0State Grid Xinjiang Electric Power Research Institute, XinjiangAt present, the biggest problem faced by short-distance double-circuit parallel lines is the three-phase parameter asymmetry problem caused by non-transposition. This leads to three-phase current asymmetry, especially during heavy load performance is more prominent. Take a 750 kV double circuit parallel erection line in actual operation as an example, use EMTPE electromagnetic transient simulation software to simulate and analyze the current imbalance phenomenon. This paper studies the influence of phase sequence arrangement, distance between loops, distance between wires, line length, equivalent impedance, ground wire conditions and line power flow on current imbalance, and puts forward reasonable restraining measures. The simulation results show that when the line power flow is heavy, the double circuit lines are arranged in the same phase sequence and the distance between circuits is relatively short, there will be a large amplitude of zero sequence current on the line, mainly circulation current. If it is not suitable to adjust the protection measures, it can be considered to adjust the double-circuit lines to reverse phase sequence operation mode. The research results can provide reference for the engineering design of double-circuit parallel transmission lines.https://www.metrology-journal.org/articles/ijmqe/full_html/2023/01/ijmqe220016/ijmqe220016.htmlcurrent unbalancedouble circuit parallel transmission linessequence componentinfluencing factorsemtpe |
| spellingShingle | Xie Yadi Li Shan Wang Chong Yang Dingqian Analysis and treatment of current unbalance abnormal situation of 750 kV double-circuit parallel transmission line International Journal of Metrology and Quality Engineering current unbalance double circuit parallel transmission lines sequence component influencing factors emtpe |
| title | Analysis and treatment of current unbalance abnormal situation of 750 kV double-circuit parallel transmission line |
| title_full | Analysis and treatment of current unbalance abnormal situation of 750 kV double-circuit parallel transmission line |
| title_fullStr | Analysis and treatment of current unbalance abnormal situation of 750 kV double-circuit parallel transmission line |
| title_full_unstemmed | Analysis and treatment of current unbalance abnormal situation of 750 kV double-circuit parallel transmission line |
| title_short | Analysis and treatment of current unbalance abnormal situation of 750 kV double-circuit parallel transmission line |
| title_sort | analysis and treatment of current unbalance abnormal situation of 750 kv double circuit parallel transmission line |
| topic | current unbalance double circuit parallel transmission lines sequence component influencing factors emtpe |
| url | https://www.metrology-journal.org/articles/ijmqe/full_html/2023/01/ijmqe220016/ijmqe220016.html |
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