输电线路实时增容技术的理论计算与应用研究  

Theoretical Calculation and Application Study on Real-time Capacity-increase of Transmission Lines

作　　者：黄新波[1] 孙钦东[2] 张冠军[3] 程荣贵[4] 

机构地区：[1]西安工程大学电子信息学院,西安710048 [2]西安理工大学计算机学院,西安710048 [3]西安交通大学电气工程学院,西安710049 [4]西安通信学院基础部,西安710106

出　　处：《高电压技术》2008年第6期1138-1144,共7页High Voltage Engineering

基　　金：陕西省自然科学基础研究计划(2006E117);西安市科技计划(GG06050);陕西省教育厅科技专项基金(06JK298)~~

摘　　要：电力系统可采用实时增容技术来提高现有输电线路的输送载流量,实现对导线温度、环境温度、风速等因素的实时监测,从而在不改变现行技术规程规定的前提下动态调整输送载流量。为此,建立了输电线路暂态运行方程,给出了导线允许温度与弧垂变化的关系式,并分析了导线允许温度、环境温度、风速、日照强度等因素对线路输送载流量的影响。研究结果表明:环境温度较低(<10°C)时,提高导线允许温度对输送载流量的影响不大(11%);环境温度较高(>30°C)时,提高导线允许温度对输送载流量的影响较大(22.7%);而环境温度和风速对输送载流量的影响要远远大于导线允许温度的影响。运行结果表明:实时增容技术可有效提高现有输电线路的输送载流量(>50%),它比静态增容技术更有效。The real-time capacity-increase technology of transmission lines is adopted to increase transmission current capacity of transmission lines, by which the conductor temperature, the ambient temperature and the wind speed can be timely measured and the transmission current capacity can be adjusted dynamically without breach of available rules. The transient running formula of transmission lines is established, the mathematical relationship between the conductor allowable temperature and the variety of sag of the span is presented, and the effect of environment parameters on the transmission current capacity of lines is analyzed, such as ambient temperature, wind speed, sunshine intensity, etc. The theoretical results show that the effect of conductor limited temperature on transmission current capacity is weak （11% ） when the ambient temperature is below 10 ℃ and stronger when the ambient temperature is higher （22.7%） than 30 ℃. and the effect of the ambient temperature and the wind speed on transmission current capacity is greater than that of the conductor temperature. The running results show that the transmission current capacity of existing transmission lines can be improved by 50% by real-time capacity-increase technology which is more effective than the static capacity-increase technology.

关 键 词：输电线路 实时增容 导线温度 环境温度 风速 输送载流量 静态增容 

分 类 号：TM726[电气工程—电力系统及自动化] TM744