According to the planning of The State Grid Corporation of China, during the 14th Five-Year Plan period, the total investment of UHV AC and DC projects is 30.2 billion yuan, 12,600 km of UHV AC lines will be added, and the transformer capacity will be 174 million kVA, and 17,200 km of DC lines will be added, and the converter capacity will be 163 million kW. UHV power grid will usher in a new round of construction peak.

The Baihetan-Zhejiang ±800 kV UHV DIRECT current transmission project has been approved by the National Development and Reform Commission (NDRC), the 10th line approved since the UHV restarted in 2018.

According to the Notice on Accelerating the Planning and Construction of a Number of Key Power Transmission and Transformation Projects issued by the National Energy Administration in 2018, 12 UHV lines were planned to be approved by the end of 2019.

In the view of insiders, although the approval speed of UHV is lower than expected after the restart, the construction tide of UHV will come during the "14th Five-Year Plan" under the background of building a new power system and achieving peak carbon neutrality.

01

Multiple projects await approva

After reviewing the construction of UHV in the past five years, the reporter found that the construction of UHV was zero in 2017 and 2020, and even in 2018, when the country restarted UHV projects, only six UHV lines were started. At present, zhumadian - Wuhan UHV ac project and Nanchang - Wuhan UHV AC project are still in the approval stage.

Following last year's mengxi jinzhong 1000 kV and Zhangbei 1000 kV Xiongan UHV projects, this year qinghai - Henan ±800 kV, Shaanxi - Wuhan ±800 kV, Yazhong - Jiangxi ±800 kV three UHV projects are put into operation. In the view of insiders, UHV construction will enter a prosperous period in the future due to its technical advantages of large transmission capacity, long distance and high efficiency, which can greatly improve the transmission capacity of power grid, promote the consumption of new energy in northwest and southwest China, and reduce the rate of abandoning water, wind and light. A large number of ultra-high voltage (UHV) projects are planned during the 14th Five-Year Plan period, and 13 UHV projects are expected to be started during the period, the reporter confirmed from sources familiar with the matter.

Informed sources told reporters that according to the state Grid Corporation of China's planning, during the 14th Five-Year Plan period, the total investment of UHV AC and DC projects will be 300.2 billion yuan, 12,600 kilometers of UHV AC lines will be added, the transformer capacity will be 174 million kVA, the DC lines will be added 17,200 kilometers, and the converter capacity will be 163 million kw. UHV grid will usher in a new construction peak. "At present, the UHV projects awaiting approval are ±800 kV Jinshang-Hubei DC, Longdong-Shandong DC, Hami North -Chongqing DC and 1000 kV Sichuan-Chongqing UHV AC."

The reporter has learned that the UHV projects under construction are under intense construction, and the ±1000 kV Changchang-Changsha UHV ac project scheduled to be completed and put into operation by the end of 2021 is progressing as scheduled. "At the site of the new 1000 kV substation project in Nanchang, Jiangxi province, nearly 900 power grid builders are carrying out construction in full swing, taking advantage of the fine autumn weather. More than half of the installation has been completed, and we plan to complete the installation of 1000 kV GIS by the end of this month." Jiangxi Province transmission and transformation Engineering Co., LTD. Site project manager Wei Chunhua said.

02

We will optimize regional energy supply and demand

In the view of insiders, China's resource endowment and load are in reverse distribution, and UHV, as a linking platform, effectively solves the dilemma between them and realizes trans-regional large-scale allocation of energy.

Data show that during the 13th Five-Year Plan period, UHV inter-regional and inter-provincial electric power transmission shows a growing trend. Last year, the state Grid UHV inter-provincial electric power transmission reached 2,0764.13 billion KWH, and it is expected that this year the UHV inter-provincial electric power transmission reached 244.1541 billion KWH. By 2025, the inter-provincial and inter-regional transmission capacity of state Grid operating areas will reach 300 million kw, and the proportion of clean energy delivered will reach 50 percent.

This summer, the highest electric load for the first time in the whole society of zhejiang 100 million kilowatts, and ningxia spirit state to shaoxing, zhejiang province, sichuan xiluodu to zhejiang Jin Huate HVDC project are full power transmission, especially during summer peaks, the country sent by the end of the balance between supply and demand are present tensions, the zhejiang province needs to promote clean energy in zhejiang. In the view of industry insiders, the approval of baihetan - Zhejiang ±800 kV UHVDC transmission project comes at a good time, and it will effectively increase cross-provincial support capacity after its operation.

A number of interviewees said that in addition to realizing trans-provincial large-scale deployment of energy, the UHV industry plays an outstanding leading role.

Data from CCID show that in 2020, the total investment scale of China's UHV industry and its supporting links upstream and downstream of the industrial chain exceeded 300 billion yuan, of which the UHV industry investment scale was nearly 100 billion yuan, driving social investment exceeded 200 billion yuan. By 2022, China's UHV industry and its upstream and downstream supporting links will drive a total investment of 414 billion yuan. By 2025, the total investment scale of the UHV industry and the industries it drives will reach 587 billion yuan. Thanks to the "14th five-year" ultra-high pressure construction expectations, the recent capital market atmosphere is particularly warm, ultra-high pressure plate progress.

03

UHV construction ideas change

In the view of insiders, UHV construction has changed from the traditional concept and operation mode of simultaneous transmission and distribution of power system to the incomplete real-time balance of coordination and interaction of source network, load and storage. In order to effectively support the development and utilization of various new energy sources, achieve high proportion of grid connection and convenient access of various energy facilities, it is necessary to speed up the construction of UHV power grid and build a strong smart grid with UHV as the backbone as soon as possible.

"The idea of ultra-high pressure development has changed compared with the past, which is in line with China's current industrial transformation and upgrading." The source said bluntly.

The reporter learned from the interview that in order to build the 14th Five-Year UHV project with high quality, the State Grid UHV AC Company and the State Grid UHV DC Company have been merged into the State Grid Co., LTD. UHV Construction branch.

An industry insider who did not want to be named told reporters that during the "14th five-year plan" how to ensure the reliable supply of electricity in east and central China is a must answer. During the 14th Five-year Plan period, the growth of electricity was slower than before, but the pressure on power balance was increased under the construction of a new power system. Therefore, it is imperative to accelerate the construction of 1000 kV interprovincial grid in central China and meet the needs of interprovincial power exchange.