电力系统保护与控制2016，Vol.44Issue(10)：84-90,7.DOI:10.7667/PSPC151184
高压架空输电线路覆冰情况下风险评估研究
Reliability risk evaluation for the high voltage overhead transmission line under icing condition
王燕 1杜志叶 1阮江军1
作者信息
- 1. 武汉大学电气工程学院，湖北 武汉 430072
- 折叠
摘要
Abstract
This paper analyzes the reliability risk evaluation method for the high voltage overhead transmission line under heavy icing condition. The finite element calculation model which considers non-linear material and coupled character of the tower-line system is built. The stress distribution and deformation of the tower-line system are analyzed considering the ice thickness and wind speed parameters. Based on iterative correction method, a new form-finding method is applied to determine the initial state of the sag, and then both the initial strain range and the shape of the grounding line are determined. Furthermore, tower safety margin evaluation method is proposed. On the basis of finite element calculated results of tower-line system under various ice thickness and wind speed condition, regression analysis is adopted to obtain the safety margin curve of the tower. The safety margin curve intuitively describes the relationship between ice thickness, wind speed and the tower failure rate level. The safety margin curve of the tower of a 500 kV icing transmission line is calculated and the vulnerable area of the tower is obtained. Comparative curve of safety margin demonstrates the validity of the improved corrective recommendations.关键词
高压输电线路/覆冰/塔-线系统/安全裕度/风险评估Key words
high voltage overhead transmission line/icing condition/tower-line system/safety interval/risk evaluation引用本文复制引用
王燕,杜志叶,阮江军..高压架空输电线路覆冰情况下风险评估研究[J].电力系统保护与控制,2016,44(10):84-90,7.
