基于置信区间的高压输电线路融冰时间等权平均研究分析  

Equally Weighted Average of Ice Melting Time for HV Transmission Lines Based on Confidence Interval

作　　者：吕锡锋[1] 何青[1] 

机构地区：[1]华北电力大学 电站设备状态监测与控制教育部重点实验室,北京102206

出　　处：《华东电力》2014年第2期360-366,共7页East China Electric Power

基　　金：中央高校基本科研业务费专项资金资助(11QX49)~~

摘　　要：导线的覆冰是我国南方地区输电线路常见的自然灾害,电热融冰技术是输电线路除冰的主要方法之一。高压输电线路的电热融冰是多物理场的非线性过程,融冰时间的长短受多种因素的影响,是关系到融冰效率的一个重要参数,本文用置信区间的等权平均对融冰时间进行分析研究,建立适合导线融冰分析的3自由度覆冰模型,确定出融冰时间的置信区间以及等权重平均值,并总结了覆冰厚度、导线温度、环境温度、以及对流换热系数等多种边界条件对LGJ-90/25、LGJ-300/40以及LGJ-500/45型雨凇导线等权重平均融冰时间的影响,为高压输电线路的融冰技术的应用和发展提供理论的分析方法和依据。Wire ice coating is a common natural disaster in southern China transmission lines, and electric melting technology is one of the main deicing methods for transmission lines. HV transmission line electric ice melting is a multi-physical nonlinear process, whose ice melting time, affected by many factors, is an important parameter related with the ice melting efficiency. This paper uses equally weighted average of confidence interval to analyze the ice melting time, and establishes the model of 3 degrees freedom suitable for wire ice melting analysis. Determine the confidence interval and the weighted average of the ice melting time, summarizes the influence of a variety of bounda- ry conditions （such as the ice thickness, wire temperature, environment temperature, and convection coefficient） on the equally weighted average ice melting time for the verglas wire of LGJ-90/25, LGJ-300/40 and LGJ-500/45. This research can provide a theoretical basis and method for HV transmission line melting ice technology.

关 键 词：高压 输电线 电热融冰 融冰时间 置信区间 权重平均 

分 类 号：TM75[电气工程—电力系统及自动化]