高寒地区110kV城网中提高导线允许温度的可行性研究

Feasibility study of 110 kV urban network on increasing conductor allowable temperature in alpine-cold region

随着电网密度逐渐增大,新建线路走廊日益紧张,提高导线允许温度,可充分发掘大量现有线路的输送能力,节约新建线路数量或降低新建线路的投资造价。文中针对高寒地区特殊的气象条件,研究了110 kV城网中提高导线温度的可行性。线路试运行结果表明,将导线允许温度从70℃提高到80℃时,除部分配套金具不能满足要求外,其余均能安全运行。

With the density increasing of urban networks, transmission line corridor is decreasing rapidly, increasing conductor allowable temperature could tap the transmission capacity potential of many existing lines sufficiently and reduce the number of new lines or reduce the cost of new lines. In particular alpine-cold meteorologic condition, feasibility of increasing conductor allowable temperature in 110kV urban networks is studied, The test running results show that networks could operate safely except that a few hardware fittings could not meet the demand when conductor allowable temperature is increased from 70 degree Celsius to 80 degree Celsius.