南方电网技术2018，Vol.12Issue(1)：33-40,8.DOI:10.13648/j.cnki.issn1674-0629.2018.01.006
覆冰工况下耐张塔失效预警技术研究
Research on Failure Warning Technology of Strain Tower Under Icing Condition
张厚荣 1张力 2杨跃光 1王敩青 1陈禾 1阮江军 2杜志叶2
作者信息
- 1. 南方电网超高压输电公司检修试验中心,广州510623
- 2. 武汉大学电气工程学院,武汉430072
- 折叠
摘要
Abstract
Icings on transmission lines occur frequently in China,which is a great threat to the safe and stable operation of transmission lines. Taking an actual ± 500 kV strain tower as an example, a real-time warning method for the failure of strain tower under icing condition based on insulator string tension measurement system and finite element method (FEM) is proposed. An angle theoretical calculation method for insulator string is put forward,and the reliability of this method is verified by comparing the calculated results with measured data. The weak points of the tower under different icing condition are analyzed and the stress distribution of tower and critical failure curve is given. It can be seen from the curve that if the large side tension is too large or too small while the small side tension is certain,the tower may fail due to over-large unbalanced tension. Failure analysis of tower under the unbalanced de-icing condition is done at last. Combining with practical application effectively,this paper has certain guiding significance for the study on the failure warning of the strain tower under icing condition of small wind speed area.关键词
耐张塔/拉力测量/有限元/失效预警/不均匀脱冰Key words
strain tower/tension measurement/FEM/failure warning/unbalanced de-icing分类
信息技术与安全科学引用本文复制引用
张厚荣,张力,杨跃光,王敩青,陈禾,阮江军,杜志叶..覆冰工况下耐张塔失效预警技术研究[J].南方电网技术,2018,12(1):33-40,8.
