Stranded Bundle VRC Power Line Deicing (Chinese)

PolarStar | Wed Sep 7, 2011
You’re attending a de-icing test with variable resistance conductor for distribution lines. Here you can see a single loop of that conductor which has an Ampacity of 200 amps. The current in both sides of the conductors is 120 amps. The conductor is constructed of 1/8 `` diameter aluminum strands twisted around the steel core in the center, like the one shown in the video. The conductor’s resistance can be electronically switched from the very low value, that is when the conductor is in normal operation, to resistance which can be 10, 25, or even 50 times greater, and this is used for rapid de-icing. The switching is done by control electronics placed at both sides of the conductor section. Such a section can be as short as one span between two conducting poles, or towers, and as long as 2 kilometers. In case of any failure or over-heating, the conductor automatically returns to normal operation’s mode. This test is being conducted at -10 C with dense wet snow frozen in and around the conductor.
下面是可变电阻导线除冰试验。这种导线可以应用到输变电线路上。画面中的是一个采用此种导线的回路,它的载流量是200安培。实验中这个导线两边电流都是120安培。导线由直径为1/8英寸铝线绞在钢丝芯上组成,如画面中的这段导线所示。其电阻可由电子开关控制,可高可低。在通常的运行模式下是低电阻,在快速除冰模式下电阻增加10倍,25倍甚至50倍。这种转换是由控制电子完成。控制电子安装在一段导线的两端。这一段导线在实际线路中的长度,短的如两个电杆或铁塔之间的距离,长的可达2公里。如有故障或过热发生,导线自动回复通常运行模式。试验是在零下10度进行,导线上的结冰是致密的雪和水凝固而成。

The conductor further away from us, will be switched in the rapid de-icing mode,
离我们稍远的那段导线,转换到快速除冰模式。

while the conductor closer to us will remain in the normal operation mode.
而离我们稍近的这段,则是正常的运行模式。

Begin test. Turn on the power. Both sides are in normal operation mode. Let’s turn on the rapid de-icing mode for the further away side. (2:05)
开始测试。打开电源,两边都是正常运行模式。让我们打开稍远的那段的快速除冰模式。

End of test (3:20) (de-icing time is from 2:05 to 3:20)
试验结束。

As you can see, the conductor in rapid de-icing mode is free of ice while the one further away from us, which is the one in normal mode did not heat, and therefore, still has the ice attached to it.
我们可以看到,快速除冰模式下的导线已经清除了冰雪,而那段离我们稍远的导线,也技术在正常的运行模式下的,没有发热,还有冰块覆盖在上面。