Influence of two strong convective weather cases on a 500 kV transmission line
The meteorological causes of wind deflection and tower collapse of a 500 kV transmission lines are analyzed. The wind speed distribution characteristics in the fault area of the line are obtained by using the observed wind speed of an automatic weather station and the three-dimensional wind field ba...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
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zhejiang electric power
2023-03-01
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| Series: | Zhejiang dianli |
| Subjects: | |
| Online Access: | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=c24b9e42-0ba4-4430-a76d-bb8b36671b59 |
| _version_ | 1797851271651131392 |
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| author | KANG Lili CHEN Keji HAN Songyu JIANG Yujun |
| author_facet | KANG Lili CHEN Keji HAN Songyu JIANG Yujun |
| author_sort | KANG Lili |
| collection | DOAJ |
| description | The meteorological causes of wind deflection and tower collapse of a 500 kV transmission lines are analyzed. The wind speed distribution characteristics in the fault area of the line are obtained by using the observed wind speed of an automatic weather station and the three-dimensional wind field based on radar inversion. The results show that the maximum wind speed and the extreme wind speed observed by automatic weather stations around the two accidents are small. The three-dimensional wind field of radar inversion better indicates the fault's location and time. Compared with strong convective weather which can cause the wind deflection， the strong convective weather which can cause the tower collapse has a higher echo height and stronger updraft. The core height of its reflectivity factor drops more than 3.5 km within 6 minutes， causing greater ground damage， but its locality is strong and the influence range is small. The results show that the current design wind speed of the transmission line is safe under the strong convective weather that causes wind deflection， but adverse terrains that can accelerate the wind speed must be avoided. It is suggested to take “cascaded collapse prevention” as the main idea for the microburst which can cause the tower collapse. In addition， under the influence of strong convective weather， the gust coefficient calculated by the observed wind speed is significantly larger than the value in the relevant specifications. |
| first_indexed | 2024-04-09T19:14:07Z |
| format | Article |
| id | doaj.art-f1c1733df53047c59070cb596d675bb3 |
| institution | Directory Open Access Journal |
| issn | 1007-1881 |
| language | zho |
| last_indexed | 2024-04-09T19:14:07Z |
| publishDate | 2023-03-01 |
| publisher | zhejiang electric power |
| record_format | Article |
| series | Zhejiang dianli |
| spelling | doaj.art-f1c1733df53047c59070cb596d675bb32023-04-06T08:17:34Zzhozhejiang electric powerZhejiang dianli1007-18812023-03-01423798710.19585/j.zjdl.2023030101007-1881（2023）03-0079-09Influence of two strong convective weather cases on a 500 kV transmission lineKANG Lili0CHEN Keji1HAN Songyu2JIANG Yujun3Zhejiang Institute of Meteorological Sciences, Hangzhou 310008, ChinaState Gird Zhejiang Economic Research Institute, Hangzhou 310008, ChinaZhejiang Meteorological Information Network Center, Hangzhou 310001, ChinaZhejiang Institute of Meteorological Sciences, Hangzhou 310008, ChinaThe meteorological causes of wind deflection and tower collapse of a 500 kV transmission lines are analyzed. The wind speed distribution characteristics in the fault area of the line are obtained by using the observed wind speed of an automatic weather station and the three-dimensional wind field based on radar inversion. The results show that the maximum wind speed and the extreme wind speed observed by automatic weather stations around the two accidents are small. The three-dimensional wind field of radar inversion better indicates the fault's location and time. Compared with strong convective weather which can cause the wind deflection， the strong convective weather which can cause the tower collapse has a higher echo height and stronger updraft. The core height of its reflectivity factor drops more than 3.5 km within 6 minutes， causing greater ground damage， but its locality is strong and the influence range is small. The results show that the current design wind speed of the transmission line is safe under the strong convective weather that causes wind deflection， but adverse terrains that can accelerate the wind speed must be avoided. It is suggested to take “cascaded collapse prevention” as the main idea for the microburst which can cause the tower collapse. In addition， under the influence of strong convective weather， the gust coefficient calculated by the observed wind speed is significantly larger than the value in the relevant specifications.https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=c24b9e42-0ba4-4430-a76d-bb8b36671b59strong convection500 kv transmission linethree-dimensional wind fieldwind deflectiontower collapse |
| spellingShingle | KANG Lili CHEN Keji HAN Songyu JIANG Yujun Influence of two strong convective weather cases on a 500 kV transmission line Zhejiang dianli strong convection 500 kv transmission line three-dimensional wind field wind deflection tower collapse |
| title | Influence of two strong convective weather cases on a 500 kV transmission line |
| title_full | Influence of two strong convective weather cases on a 500 kV transmission line |
| title_fullStr | Influence of two strong convective weather cases on a 500 kV transmission line |
| title_full_unstemmed | Influence of two strong convective weather cases on a 500 kV transmission line |
| title_short | Influence of two strong convective weather cases on a 500 kV transmission line |
| title_sort | influence of two strong convective weather cases on a 500 kv transmission line |
| topic | strong convection 500 kv transmission line three-dimensional wind field wind deflection tower collapse |
| url | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=c24b9e42-0ba4-4430-a76d-bb8b36671b59 |
| work_keys_str_mv | AT kanglili influenceoftwostrongconvectiveweathercasesona500kvtransmissionline AT chenkeji influenceoftwostrongconvectiveweathercasesona500kvtransmissionline AT hansongyu influenceoftwostrongconvectiveweathercasesona500kvtransmissionline AT jiangyujun influenceoftwostrongconvectiveweathercasesona500kvtransmissionline |