Whether the cold wave in China will be a tragedy has aroused heated discussion among netizens. What do you think of this?

Affected by the cold current, Texas and other places in the United States have recently suffered from severe cold storms, and millions of Americans have been cut off from water and electricity, with Texas being the most seriously affected. In Fort Worth, Texas, people light candles in their homes without electricity. US President Biden announced the existence of Texas? A catastrophe? And ordered the federal government to provide assistance.

This one in Texas, USA? Disaster? It has attracted the attention of many domestic netizens and asked: If China encounters a cold wave in Texas, will it? Tragedy? ? Before answering this question, let's take a look at how awesome China State Grid is.

According to the article "Development Achievements of China Electric Power Industry in 70 Years" published in Price Theory and Practice, the new China electric power industry has experienced a development process from weak to strong and from backward to advanced, and has made great achievements that attract worldwide attention. From a low level of safe operation to one of the highest levels of safe operation in the world, power supply has entered a high reliability stage. National network? . Since the founding of New China 70 years ago, China has ranked first in the world in terms of power generation and installed capacity; Power consumption increased by 1900 times; Per capita electricity consumption increased by 630 times; The line length of power grid increased by 290 times; The electrification rate is 100%.

According to the Analysis and Forecast Report of National Power Supply and Demand Situation in 2020-202 1 year issued by Power Statistics Data Center of China Electric Power Enterprise Federation, the electricity consumption of the whole society in China is 75 1 trillion kWh, up by 3. 1% year-on-year. Thirteenth Five-Year Plan? During this period, the electricity consumption of the whole society increased by 5.7% annually. China's full-caliber power generation reached 7.62 trillion kWh, up 4.0% year-on-year. Thirteenth Five-Year Plan? During the period, the national full-caliber power generation increased by 5.8% annually; The installed capacity of full-caliber power generation in China was 2.20 billion kilowatts, up 9.5% year-on-year; ? Thirteenth Five-Year Plan? During this period, the installed capacity of full-bore power generation in China increased by 7.6% annually.

According to the report of China Electric Power Enterprise Association (China Electric Power Enterprise Association), in 2020, the supply and demand of electricity in China will be generally balanced, and some areas will be more than enough. Power supply is tight in some areas during peak hours, and it is sufficient and reliable during epidemic prevention and control, which provides a strong power guarantee for social epidemic prevention and control and national economic development.

According to official reports, during the Spring Festival, the State Grid operated smoothly, and the national average daily power generation increased by 1.73% year-on-year. The power received by China Southern Power Grid was 65.438+04.559 billion kWh, and the power transmission from west to east was 654.38+05.1700 million kWh, increasing by 654.38+03.0 1% and 256.5438+03% respectively. With such a deep body? Internal strength? , the state grid to deal with the cold wave? Trick? It is also endless, exquisite and exquisite.

First of all, it must be clear that it is necessary to resist ice and protect electricity in the cold wave, right? Relatively warm? The south generally does not need the lower temperature in the north. This is related to the geographical location, topographic environment and special weather and climate in the south. Under the continuous low temperature and rainy weather, supercooled water droplets (rain and fog) in the air collide with the surface of an object with a near-surface temperature below 0℃ and freeze rapidly, gradually forming a layered ice shell covering the surface of the object. This phenomenon is vividly called in Guizhou. Frozen? . For the power grid, icing will cause lines and equipment to freeze.

Freezing disasters mainly occur in mountainous areas in southern China, especially in Yunnan-Guizhou Plateau in winter. The meteorological conditions leading to icing are:

1 is cold, and the temperature is maintained near or below 0℃; 2 wet, continuous freezing rain, Mao Mao rain or dense fog, and sometimes sleet; Level 3 wind, the wind speed is suitable. Freezing is not only a local phenomenon, but also often occurs in mountainous areas of Sichuan, Chongqing, Yunnan, Hunan, Guangxi and other provinces around Yunnan-Guizhou Plateau, and even in mountainous areas of Hubei, Jiangxi, Anhui, Zhejiang, Fujian and other provinces.

Due to the special climate in southern mountainous areas, transmission lines and equipment will be covered with ice. Icing of transmission lines will lead to ice flash, short circuit, disconnection and even tower collapse, which will lead to power system failure. Therefore, every winter, especially during the cold wave, China Southern Power Grid must start anti-icing and protect electricity, and remove the icing on the lines in time to ensure the safe operation and stable power supply of the power grid. In the strongest cold wave, China Southern Power Grid accumulated 10 kV and above lines to be iced for thousands of times, and dispatched more than 6,000 people to carry out anti-icing emergency work every day.

So what? Anti-icing and anti-electricity protection? How? It is a natural phenomenon that the sky will freeze and the lines will freeze. At this stage, manpower cannot be reversed. Fortunately, technology has been improving, doing it every year? Anti-icing and anti-electricity protection? Work, from manual to high-tech leap, this work, grid people are more and more handy.

Sky-eye ice observation: an ice observation drone that can accurately measure the ice thickness of the line. Since the ice disaster in 2008, China Southern Power Grid Corporation has greatly improved the anti-icing ability of the power grid by vigorously implementing the anti-icing reinforcement project, adopting DC deicing technology and building an icing monitoring and early warning system. DC deicing: By applying DC voltage to the transmission line, short circuit is made at the end of the transmission line, and the conductor is heated to deice the transmission line. The principle is simple, but considering the actual situation of the power grid, the transmission line is very long and the operation of the large power grid is very complicated. Behind it is a lot of scientific research, development and application, which can be described as full of science and technology. ? One-button sequential DC ice melting? The staff only need to click the mouse, and the ice on the line will melt! One-click ice melting: The staff of Yunnan Zhaotong Power Supply Bureau of China Southern Power Grid can melt the ice on the line with the click of a mouse! One-key sequential DC ice melting operation shortens the original 4-hour ice melting operation to 10 minute. Laser cannon:? Laser cannon? Not only a small expert in clearing obstacles, but also? Ice melting artifact? . The ice layer with the thickness of 12 cm can be removed successfully within 8 minutes. The laser obstacle-clearing instrument is now in its fifth generation, smaller in size and more powerful in function. Lidar: Lidar carries out line scanning observation, and only takes 10 minute to complete the collection of ice-covered ground wires, towers and landforms of 56 1 meter. By accurately measuring the spatial position of the dense laser spots emitted by the backpack lidar equipment, the centimeter-level fine model of the whole line, that is, the digital transmission line, can be output, which has a good guiding significance for disaster prediction. There is a saying in our power system:? Social development, power first, safety first? The sense of security mentioned here is not what we usually know? Little security guard? Or personal safety, but the stability of power grid, which is multi-level? Great security? . ? Power grid? Aorta? Strong? Capillary? Smooth, also is not a day's work. In the cold, rainy and freezing weather year after year, China power grid has been making progress and getting stronger and stronger.