This summer, the high temperature in many places across the country keeps the demand for electricity high. UHV transmission projects have established a "green corridor" for energy transmission, which allows clean hydropower to flow smoothly across the country and ensure the overall balance of power supply and demand.
76% of China’s coal resources are in the north and northwest, 80% of the hydropower resources are in the southwest, and most of the land wind energy is concentrated in the northwest, northeast, and north of North China, and more than 70% of the energy demand is in the eastern and central regions. The long-term trend of China's economic development and the endowment characteristics of energy resources determine that the basic pattern of energy development center shifting to the west and the load center in the eastern and central regions will not change for a long time. Build ultra high voltage power grids to transport thermal power, wind power, solar power generation, and southwestern hydropower in the western and northern regions to the east over long distances. Large-scale energy consumption in the energy consumption of end-users can be effectively replaced by electricity or electricity instead of electricity (gas). Energy consumption bottlenecks in the eastern and central regions.
Cross-regional coal transportation is more expensive than burning oil, and it costs more than half of the cost to transport it to the consumption area. According to Li Yizhong, former deputy director of the Economic Committee of the National Committee of the CPPCC and former Minister of Industry and Information Technology, “fuel needs to be transported over long distances and is not reasonable. The best way is to let the place where resources are abundant generate electricity, and then transport it to the eastern coast via UHV.â€
Bai Jianhua, deputy chief economist of the State Grid Energy Research Institute and director of the Institute for Energy Strategy and Planning, briefed reporters on the combination of factors such as high transportation links, large coal traffic on roads, poor coal coal quality, and high energy consumption in coal transportation methods. . According to a survey conducted by Shanxi Datong through the Qinhuangdao Port to the East China Sea Iron Sea Union Coal Transportation Process, the energy consumption of the coal transportation method is as high as 8.4%, including the power consumption of railway transportation, the fuel consumption of road and ship transportation, the fuel consumption and power consumption of port loading and unloading. Transportation energy consumption, such as the loss of transportation at the collection and transportation stations, railways, highways, waterways, and ports, and the increased energy consumption for transportation of low calorific value coal. Under the same transport path, considering the increased energy consumption of air-cooled units, the energy consumption of the UHV AC transmission method is only 6.1%, which is 2.3% lower than that of coal transportation.
"The 21st century energy security will be based on all-round energy security, and China should lose no opportunity to lead the construction of a comprehensive energy security system based on electricity." Xie Kechang, vice president of the Chinese Academy of Engineering, held an academic forum in April this year. Said. The large-scale and high-efficiency optimization of energy resources and the implementation of electrical energy substitution at the end-use energy consumption are the inevitable choices to ensure the safe and reliable supply of energy in China.
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