After continuous snowfall, the land in western Beijing was covered in silver. The house of Li Yuanrong, an old man in Tanchang Village, Miaofengshan Town, Mentougou District, Beijing, was clean and tidy. The electric heating equipment beside the wall was working silently. The indoor thermometer showed 22 degrees Celsius.

Miaofengshan Town is the first coal-free town in Mentougou area, and it is also an area severely affected by floods this summer. Since November, we have inspected the lines and equipment of the "coal to electricity" village every day, which has become the daily work of Zhang Lizhi, customer manager of the "coal to electricity" power supply station of the State Grid Mentougou Power Supply Company, and his colleagues. During the snowfall in Beijing from December 13th to 16th, 38 customer managers of the State Grid Mentougou Power Supply Company carried out grid service guarantees in 106 "coal-to-electricity" villages and responded to customer demands 24 hours a day.

Yuan Zonghui, deputy director of the equipment department of the State Grid Beijing Electric Power Company, said that in response to the cold wave and cooling weather, more than 8000 cadres and employees of the company actively carried out the work of keeping warm and providing supplies. In view of the icing of power lines in mountainous areas, they used vertical take-off and landing fixed-wing unmanned aerial vehicles for the first time to inspect transmission lines. The UAV has vertical take-off and landing capability. It is not restricted by terrain. It is equipped with high-definition cameras, infrared cameras, lidar and other equipment. It can transmit the inspection images back to the ground station operators in real time through satellites.

Recently, rain and snow cooling weather continued to affect many places in northern China. The State Grid Corporation of China closely follows the changes of severe weather in various places, adjusts the operation mode in time, and fully guarantees the grid structure and startup intensity. Arrange coal and electricity to "open as much as possible" and organize all kinds of supporting power supplies to be fully developed and stable. Coordinate the whole network resources to support areas with tight balance, realize "complementary resources, mutual aid in time and space, and mutual benefit in the market" to ensure the safe and stable operation of power grid and reliable power supply.

At 0:00 on December 15th, the first unit of the State Grid Xinyuan Liaoning Qingyuan Pumped Storage Power Station, the largest pumped storage power station in Northeast China, successfully passed the 15-day trial operation, with excellent indicators and officially put into operation for power generation.

According to the introduction of relevant staff of the northeast branch of the State Grid Corporation of China, the northeast branch comprehensively studied and judged the load change trend, and according to the principle of "should be combined and should be combined and should be combined", it started all 4 million kilowatt standby shutdown units and released long-term power balance information in advance. Supervise the dispatching and power generation enterprises in three provinces and one district to strengthen unit monitoring, optimize the operation mode of pumped storage units, and improve the peak capacity of the power grid; adhere to the "medium-and long-term basis, spot surplus and shortage of mutual aid, emergency dispatch emergency" principle, make full use of the auxiliary service market, improve the supply capacity.

From December 14, the strongest cold wave since this winter in Hunan went online, and the highest temperature dropped by 20 degrees Celsius. In order to ensure the safety and warmth of the people of the whole province through the winter, in terms of enhancing the power supply capacity, the State Grid Hunan Electric Power Innovation Market Trading Mechanism, signed a flexible trading agreement with Gansu, to achieve Qishao DC in the second half of the year according to the channel capacity full delivery. At the same time, the State Grid Hunan Electric Power closely tracks the channel and supply and demand situation, expands the source of electricity purchase, and improves the winter delivery capacity. It is estimated that the direct current power transmission in Qishao will reach 33.8 billion kilowatt-hours this year, up 17.8 percent year on year.

In terms of ensuring the stable output of electric power, many UHV stations in Hunan have stepped up equipment inspections and adopted digital means to ensure the safety and reliability of power supply. As the receiving end station of Qishao UHV DC, ± 800 kV Shaoshan Converter Station shoulders the important mission of helping Hunan's energy transformation and development and driving economic and social development. In order to ensure the "peak winter" this year, Shaoshan converter station has carried out in-depth defect and hidden danger management to ensure that key hidden dangers are "cleared to the bottom" and the annual maintenance of the camera is completed with high quality.