The hottest UHV may reconstruct the energy storage

2022-08-02
  • Detail

UHV may restructure the energy storage and transportation pattern

to realize the effective connection between large coal power, hydropower and wind power bases and load centers in the Middle East

during the 12th Five Year Plan period, Xinjiang electric power company will build 1100 kV high-voltage projects in Hami Zhengzhou and Zhundong Chongqing, with Xinjiang power transmission capacity reaching 25million kW; Shanxi electric power will build three ultra-high voltage channels and 500 kV three vertical and four horizontal main frames, and the external power transmission will reach 30million kW, twice that during the Eleventh Five Year Plan period. The full launch of China's ultra-high voltage power construction will not only become the main force of power transmission from major energy provinces, but also play a huge role in building a modern energy storage and transportation system

UHV will become the main channel for energy transmission from a large province.

at present, the northwest is one of the regions with the most abundant energy resources in China, in which the prospective coal reserves account for about half of the country, and the wind energy resources account for about 1/3 of the country's onshore exploitable capacity. There is a huge potential for power development. Up to now, Shaanxi, Gansu, Ningxia, Qinghai and Xinjiang have been linked together, making it a reality that coal, hydropower, wind power and other energy in the northwest are bundled to the power load center in the Middle East. Recently, the National Energy Administration agreed to carry out preliminary work for 11 750 kV power projects of northwest power, marking the beginning of the construction of northwest power during the 12th Five Year Plan

according to the plan, in addition to the Northwest Central China Lingbao back-to-back project, Baoji Deyang DC project and Northwest Central China Ningxia east transmission to Shandong DC project that have been put into operation, northwest power will build five UHV DC transmission projects in Ningxia, Zhejiang, Xinjiang, Henan, Gansu, Hunan, Xinjiang, Chongqing, Gansu and Jiangxi, as well as 660kV DC transmission projects in Shaanxi and Shandong, and Qinghai Tibet joint project. By then, the scale of northwest electric power transmission will be increased from the current 6.11 million kW to 55.81 million KW, 9.1 times of the current scale. Among them, the export capacity of UHVDC project will reach 42.5 million KW, accounting for 76.2% of the total export scale

It is recorded that after 10million to 40million cycle tests

according to the national power planning, China will build UHV power in North China, East China and central China (Sanhua) by 2015, forming three vertical lines, three horizontal lines and one ring, and build 11 UHV DC transmission projects. Among them, three vertical, three horizontal and one ring refer to the power transmission from Ximeng, Mengxi, Zhangbei and Northern Shaanxi energy bases to Sanhua through three vertical UHV AC channels, and the power transmission from northern coal power and southwest Hydropower to North China, central China and Yangtze River Delta UHV ring through three horizontal UHV AC channels. By 2020, the coal power of Shanxi and Northern Shaanxi will be transmitted through UHV AC, the coal power of Mengxi, Ximeng and Ningdong will be transmitted through UHV AC and DC, and the coal power of Xinjiang and Mengdong will be transmitted to Sanhua power through UHV DC

UHV is an important component of modern storage and transportation system

the proposal of the Fifth Plenary Session of the 17th CPC Central Committee on formulating the 12th Five Year Plan for national economic and social development clearly points out that it is necessary to strengthen the construction of modern energy industry and comprehensive transportation system. In this regard, the national energy administration proposed to build a modern energy storage and transportation system, strengthen the construction of transportation channels in the three western regions, eastern Mongolia and Xinjiang, and improve the capacity of transporting coal from the north to the South and from the west to the East. We will continue to transmit electricity from the west to the East and from the north to the south, and build EHV and UHV transmission lines

on February 15, this newspaper learned from the Comprehensive Transportation Research Institute of the national development and Reform Commission that the Research Report on the construction of the 12th Five Year Plan energy comprehensive transportation system jointly drafted by the Comprehensive Transportation Research Institute of the national development and Reform Commission and the National Energy Research Institute of household appliances, commissioned by the national development and Reform Commission, is being revised. It is understood that in addition to railway, highway, waterway, aviation and pipeline transportation, power transmission is also classified as energy transportation. For the current situation that the Ministry of Railways plans railways, the transportation department plans highways and waterways, and the electric power department plans electric layout. The research report suggests that it is necessary to plan and manage the production, transportation and marketing of coal power and the integration of mining, road, port and electricity

at present, the transportation capacity of the three west regions (Shanxi, Shaanxi and Western Inner Mongolia), the main coal dispatching areas in China, is close to saturation. In this regard, changing coal transportation to power transmission is undoubtedly one of the important ideas for the transformation of coal producing areas. Over the past two years, the 1000 kV high-voltage AC line has been connected with central China Electric Power Co., Ltd., which has realized the mutual aid of water and fire, greatly alleviated the power shortage in Central China during the dry season, and also greatly reduced the pressure of highway and railway transport capacity tension. Li Xiaopeng, vice governor of Shanxi Province, said in a recent media interview

in addition, in order to reliably transmit the unstable power in Hami, Xinjiang, Jiuquan, Gansu and other wind power bases, it must be bundled with coal power and hydropower, which also requires the development of strong and intelligent power. Among them, UHV power will undoubtedly play a key role

On January 5, the maximum load gap of Hubei electric power reached 2.92 million KW, and the national power transmitted 985million kwh to Hubei through UHV, effectively making up for the power supply gap in Hubei; On January 8, the power supply gap in Sichuan was 1.5 million kilowatts. Huazhong power mobilized power from Hubei, Henan, Hunan and Jiangxi provinces to assist Sichuan with 24million kilowatt hours of electricity through UHV, ensuring the safe and stable operation of Sichuan power. Facts have proved that UHV has played a positive role in optimizing the allocation of energy resources and promoting economic and social development

coal is the main primary energy in China, and coal electricity accounts for the largest part in the power structure. In all economically developed regions, there is also a need for sufficient local power supply. As long as the above conditions are not fundamentally changed, the phenomenon of coal transportation will exist for a long time. The new national standard for Science in China has six characteristics: Panjiazheng, an academician of the Chinese Academy of Sciences and the Chinese Academy of engineering, recently wrote an article, but we must also see the corresponding severe consequences, various constraints and the development trend of clean power supply. Therefore, it is not only feasible but also necessary to vigorously develop long-distance transmission technology to alleviate the contradiction

the power transmission is clean power. In contrast, less than half of the carbon in raw coal is ash, stone and impurities. Moreover, considering climate change commitments, energy supply structure indicators, coal resources, safe production, environmental capacity, land carrying capacity and other aspects, the development of UHV is mainly due to the fact that products such as fasteners 1 are strong smart electricity used to fix things, which can not only reduce the coal transportation pressure of Railways and highways, save power supply costs, but also promote the construction of large coal power bases in coal producing areas, Improving the comprehensive utilization of coal is also a technical and experience guide to mine associated resources, and creating significant economic benefits. It is estimated that the contribution ratio of coal transmission and power transmission to GDP is about 1:6, and the employment pull effect ratio is about 1:2

as Panjiazheng pointed out, power transmission and coal transportation complement each other, and there is no competition. The construction of coal transportation channel should be adapted to local conditions. If the efficiency of railway transportation is not high, it is a more ideal choice to strengthen power construction. (wangxuhui)

Copyright © 2011 JIN SHI