How to clear the snow on the wire (regardless of cost)

DC deicing device uses DC short-circuit current to generate heat in conductor resistance to melt ice. For lines with different wire diameters and lengths, different deicing currents can be obtained by adjusting their DC output voltages.

The impact on the system during ice melting is small, and less switching operations are needed. In addition, due to the small size of the 6-pulse DC ice melting device, it can move ice melting between stations.

After the ice disaster in 2008, most of them have been equipped with deicing devices (high current method), and those without deicing devices and surface insulation generally use artificial deicing (bamboo pole beating, rope throwing, pulling wires along the line, etc.). ), without an insulated surface, manual deicing can only be used if there is a power outage.

Extended data

Application of DC deicing device in power system

At the beginning of 2008, the northern part of Shaoguan suffered the most serious ice and snow disaster since meteorological records were recorded. The bad weather caused hard and heavy ice to condense on the transmission lines, which caused the transmission lines to be overwhelmed, broken wires and collapsed towers, and the whole northern Shaoguan power grid was in a state of collapse.

The disastrous weather has brought great losses to Shaoguan power grid. In this disaster, 220kV Tongji Station also had 220kV Pingtong Line, 1 10kV Tongluo Line A and Tongluo Line B stopped due to the ice disaster.

According to the characteristics of Shaoguan area, Shaoguan Power Supply Bureau installed a DC deicing device in 220kV Tongji Station, which can deice the 220kV and 1 10kV outgoing lines in the station, thus ensuring the safe power supply of important loads.

References:

Baidu encyclopedia -DC ice melting device