基于BOTDR测温技术的架空线路动态增容方法

摘要

架空导线的载流量一般是在输电线路周围环境为恒定的假设下计算得到的,是比较保守的定额.为了充分利用现有架空输电线路的输电能力,提出一种基于BOTDR测温技术的在线动态增容新方法.利用OPGW上的BOTDR测温技术对架空线路周围环境温度进行分布式测量,通过牛顿迭代推导出导线温度,将导线实时温度瓶颈点代入新的热平衡公式,从而计算出实时载流量.计算证明,该方法能够有效地提高线路载流量,对线路载流量设计优化有理论指导作用.%The transmission capacity of overhead line is generally calculated under the assumption that the surrounding environment of the transmission line is constant,and it is quite conservative.In order to make full use of the transmission capacity of the existing overhead transmission lines,a new method of on-line dynamic capacity-increase is developed based on BOTDR temperature monitoring technology.By using the Brillouin optical time domain reflectometer (BOTDR) temperature monitoring technology on OPGW,distributed measurement can be done for the ambient temperature of the long distance overhead line in real time.The wire temperature is deduced by Newton's iteration method.The real time load flow is calculated by substituting the choke point of temperature of real-time wire into the new simplified heat balance equation.The result shows that this new method can effectively improve the carrying capacity of the line and is of great theoretical value to design optimization of the line load flow.