摘要
以导线抛物线模型为基础,根据《110～500 kV架空送电线路设计技术规程》提出的四种可能气象控制条件,建立架空导线的状态方程,并通过牛顿-拉夫逊迭代求得导线的应力,进而推导出弧垂和限距计算方法,提出了在实际环境下计算和校验导线弧垂变化以及对地跨越物限距变化的方法。该方法在广东电网某实际运行的220 kV线路上进行了验证,计算结果与现场测量结果相比仅有少许的误差,由此证明了所提方法是可行的。
Based on the parabola model and four kinds of possible weather condition given in ＂the Design regulations for 110～500 kV overhead Line＂,this paper establishes the state equation of transmission lines,computes the working stress through Newton-Raphson iteration,derives the sag and span restriction and hence presents a practical method calculating the sag and restriction on and span of overhead lines under real environment.This method has been verified in a 220 kV transmission line of Guangdong Power Grid,which is putting into operation.The results from the proposed method only have a little error compared with that from on-site measurement.Therefore the feasibility of this method is demonstrated.
出处
《南方电网技术》
2010年第5期106-109,共4页
Southern Power System Technology
关键词
架空导线
跨越
弧垂
应力
气象条件
overhead lines
span
sag
working stress
weather condition
