Chao News client reporter Huang Weifen correspondent Fu Yunxiao Hu Runhan Wu Chen.
According to the commander-in-chief, the branch line of the Mingchuan V264 Nature Reserve has been changed to a DC ice melting state, the line is unmanned, the line has no ground wire, and the personnel of each unit have been in place and have the conditions to carry out DC ice melting. On January 10, the State Grid Hangzhou Lin'an District Power Supply Company carried out a distribution network mobile DC ice melting drill in Qingliangfeng Town, and Luo Chao, the person in charge of the site, used the walkie-talkie to report in real time.
This drill simulated that under the condition that the 10,000-volt Mingchuan Line Xialin Branch of Qingliangfeng Town was affected by cold wave weather, and the State Grid Hangzhou Lin'an District Power Supply Company applied an extended DC ice melting device to carry out ice melting operations.
The mountainous area in the western part of Lin'an has a high altitude, and the average temperature is at least 5 percent lower than that in the urban area. The power supply radius of the line in mountainous areas is relatively long, and most of them are in radiation operation mode, which is very easy to cause accidents such as inverted poles and broken lines in the event of freezing disasters. Xu Lixin, a full-time distribution network operation in the company's operation and maintenance department, said, "We carried out ice melting drills in mountainous areas in advance, mainly to improve the anti-icing and anti-icing ability of the power grid in bad weather." ”
It is reported that the weight of the extended DC ice melting device is only 320 kg, and the line temperature can be raised from 0 to 20 in 10 minutes, which can meet the requirements of 02 to 2Ice melting demand for distribution network conductors within 0 km. Compared with the traditional active mobile ice melting device, its ice melting line distance is longer, and the ice melting process control of the line is more accurate, which can effectively meet the needs of rapid de-icing of distribution network lines in mountainous areas under bad weather and ensure the safety of the line.
Under normal circumstances, if the power grid line is covered with ice, manual de-icing will be used to remove hidden dangers. With the application of intelligent equipment such as extended DC ice melting devices, there are more options for line de-icing. "Through the DC ice melting device, the AC output of the emergency power generation vehicle is converted into DC electricity and added to the ice melting line, and the thermal effect of DC current is used to melt the ice on the line. This technology is more efficient than manual de-icing, and the risk factor is also greatly reduced, which not only ensures the safe operation of the power grid, but also ensures the personal safety of emergency repair personnel. Xu Lixin said.
Next, the State Grid Hangzhou Lin'an District Power Supply Company will continue to do a good job in the icing monitoring of the main distribution network equipment, maintain the ice melting equipment in a timely manner, and actively optimize the organizational structure, strengthen the rapid response ability of the emergency repair team, and ensure that in case of extreme weather or sudden danger, it can take immediate action and deal with it decisively.
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