The hottest UHV industry technology is expected to

2022-09-19
  • Detail

UHV industry technology is expected to become "China's business card"

UHV, which refers to 1000kV AC or ± 800kV DC. The UHV ± 800 kV DC transmission project, which was studied and constructed by State Grid and China Southern Power Co., Ltd., won the special prize of 2017 National Science and technology progress award on January 8. This technology is the transmission technology with the highest voltage, the largest capacity and the longest economic transmission distance that has been successfully applied in the world at present. In the construction of the "the Belt and Road", we should strengthen the promotion of this technology to make it a bright "Chinese business card" of China's "going global". The transmission voltage is generally divided into high voltage, super electromechanical coil is burnt out, and whether the contact of the reversing switch is good, such as high voltage and ultra-high voltage. Internationally, high voltage (HV) usually refers to the voltage of 35 220kV; EHV usually refers to the voltage of 330kV and above and 1000kV and below; Ultra high voltage (UHV) refers to the voltage of 1000kV and above. High voltage direct current (HVDC) usually refers to the DC transmission voltage of 600kV and below, and the voltage of 800 kV and above is called ultra-high voltage direct current transmission (UHVDC). UHV refers to 1000kV AC or 800kV DC

the UHV 800 kV DC transmission project, which was studied and completed by State Grid and China Southern Power Co., Ltd., won the special prize of the 2017 National Science and technology progress award on January 8. This technology is the transmission technology with the highest voltage, the largest capacity and the longest economic transmission distance that has been successfully applied in the world at present. In the construction of the the Belt and Road, we should strengthen the promotion of this technology to make it a bright Chinese business card for China to go global

the bottleneck of UHV investment growth highlights.

according to the "analysis report on the gap planning of UHV equipment industry market prospects and investment strategy adjustment coordination" released by the prospective industry research institute, with regard to the zero adjustment of various types of experimental machines, China's electricity investment market space is about 500 billion yuan. The national electricity investment has increased from 250billion yuan in 2008 to nearly 500billion yuan in 2016. The investment has doubled in eight years, with an average annual compound growth rate of 9%. In recent years, the national electricity investment has remained above 450billion yuan, the growth rate of investment has decreased year by year, and the market space has remained at about 500billion yuan

the average annual compound growth rate of UHV cumulative investment was about 20% before 2012. It began to grow rapidly in 2014. In 2015, the growth rate exceeded 50%, and the growth rate peaked. In 2016, the growth rate of UHV cumulative investment fell by more than 20 percentage points year-on-year. The growth rate of UHV cumulative investment is similar to that of high-speed rail and nuclear power industries

the market space and growth rate of China's power investment in

the advantages of 800 kV DC transmission technology are obvious

the distribution of China's energy resources and power load is extremely uneven, more than 80% of energy resources are distributed in the West and North, and more than 70% of power consumption is concentrated in the East and middle. The contradiction between energy supply and economic development is prominent. Developing high-capacity, long-distance and high-efficiency transmission technology is the inevitable choice for the cross regional and large-scale optimal allocation of power energy in China

UHV 800 kV DC transmission project brings significant economic and social benefits. Its transmission capacity is two or three times that of 500 kV DC project, and the economic transmission distance is increased to 5 times, the operation reliability is improved by 8 times, the loss per unit transmission distance is reduced by 45%, the area of line corridor per unit capacity is reduced by 30%, and the cost per unit capacity is reduced by 28%

UHV DC transmission technology is internationally recognized as China's leading technology in the world. At present, only China has fully mastered this technology and has begun large-scale engineering applications. In 2010, China independently built the Yunnan Guangdong and Xiangjiaba Shanghai UHV 800 kV DC demonstration projects. By the end of 2017, a total of 12 UHV DC transmission projects had been built across the country, with an annual transmission capacity of more than 450 billion kwh, of which clean energy accounted for more than 80%, equivalent to reducing the consumption of standard coal in the eastern and central regions by 170 million tons and carbon dioxide emissions by 450 million tons per year. It is the main transmission channel of the air pollution prevention and control action plan

promote UHV technology to become China's business card

their UHV transmission technology has created many records in terms of theoretical density of 250 ~ 300kg/m3, mechanism, engineering construction and equipment manufacturing capacity. From China's creation to China's leadership, it has occupied the commanding height of the world's electric technology. It is suggested to promote the export of electrical equipment, especially the contracting and equipment export of UHV DC transmission projects, like the promotion of high-speed rail, Hualong No. 1 nuclear power and other projects

on the one hand, UHVDC transmission technology, engineering operation design technology and China's large power operation technology are transmitted as China's business cards. China has a good technical foundation, manufacturing capacity and design capacity. According to the different needs of different countries for transmission technology, China has the ability to provide different solutions. These technical solutions can go to sea together and enhance the added value of China's products and equipment going global

on the other hand, continue to invest and optimize the existing technology level. Since 2016, China Southern Power has undertaken the national key research and development plan project, and independently developed flexible DC transmission technology. At present, the UHV DC transmission project from Yunnan to Guangdong, which is being constructed by southern power, adopts the hybrid mode of traditional DC and flexible DC, which can improve the safety and reliability of electricity, and is the world's first

flexible DC transmission technology is the development direction of electricity in the future.

this technology has higher requirements in digitization and intellectualization. We hope to get the support of relevant national departments in project approval, software and hardware research and development and talent introduction, so that this Chinese wisdom has greater development space

for more industry information, please click attention: electromechanical industry

Copyright © 2011 JIN SHI