摘要
台风天气严重威胁到沿海地区电力系统的安全稳定运行,由于配电网设计标准相对较低,配电设施受到的影响较大.架空配电线路混凝土电杆破坏现象已成为配电故障的重要因素,有必要对其破坏进行深入分析.本文对混凝土电杆受风载作用下的应力分布及弯矩进行了研究,并考虑最严重的情况,对导线承受风载时电杆支持点弯矩进行了计算,得到了电杆支持点截面、迎风面与背风面中心线的应力分布,分析了不同风速下的杆体最大应力变化趋势,并比较了设计风速下杆身和导线分别承受风载时杆根支持点的弯矩,可为配电网设计和运维工作提供依据.
Typhoons pose a great threat to the secure and stable operation of power systems in coastal areas; and the power distribution facilities are greatly affected due to the lower design standards. The failure of con- crete poles in overhead lines is an important factor in distribution fault; so it is necessary to perform a deep analysis of it. In the paper, the stress and the bending moments of concrete poles subjected to wind loads are studied; and the bending moments of the support point resulted from transmission lines is calculated consider ing severe cases. Both the stress distribution of the cross-section of the support point and that of the center line of windward side and leeside of the pole are obtained. The maximum stresses of the pole body are analyzed; and the bending moments of the support point resulted from pole and transmission lines are compared. The results can provide basis for the design, operation and maintenance of power distribution network.
作者
马辉
李超
Ma Hui Li Chao(College of Electrical Engineering ＆ Renewable Energy, China Three Gorges Univ. , Yichang 443002, Chin)
出处
《三峡大学学报（自然科学版）》
CAS
2017年第3期66-69,共4页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金青年基金(5150070317)
湖北省微电网工程技术研究中心开放基金(2016KDW03)
关键词
风载荷
配电网
混凝土电杆
破坏
wind load
power distribution network
concrete pole
failure
