"Xinjiang electricity transmission" optimizes the allocation of energy resources across the country

Xinjiang is one of China's important comprehensive energy bases, with abundant coal, solar and wind energy resources

First, the "Xinjiang electricity transmission" covers 20 provinces, autonomous regions and municipalities across the country

In 2014, after Xinjiang's first ±800 kV Hami South-Zhengzhou UHVDC transmission project was put into operation, Hami region began to carry out large-scale centralized development of wind power and photovoltaics, vigorously built power transmission lines, actively promoted the layout of substations, and improved the structure of the local power grid, and three expansion projects

At present, the "Xinjiang power transmission" mainly includes four channels, two of which are UHV transmission, namely the ± 1100 kV UHVDC transmission project (referred to as Jiquan DC) from the Zhudong Changji converter station to the Xuancheng Guquan converter station in Anhui, and the ±800 kV UHVDC transmission project

The scope of "Xinjiang electricity transmission" covers 20 provinces, autonomous regions and municipalities in China, and the power from Xinjiang extends to Shanghai in the east, Beijing in the north, and Guangdong in the south, achieving the goal

Second, the "Xinjiang power transmission" science and technology first transmission UHV technology escort

Transmission from Xinjiang to the whole country requires crossing the desert, climbing high mountains to lay lines, and building iron towers on the Gobi Desert, which not only has extremely difficult construction conditions, but also causes serious power losses

In terms of technology, the State Grid organized the joint research of UHV transmission technology, achieved breakthroughs in modeling, design, manufacturing, maintenance and other aspects, mastered the complete design of UHVDC, modeling and simulation of transient voltage distribution in UHV converter valves, insulation of high-end converter transformers and other key technologies, and realized the comprehensive improvement

After conquering UHV technology, China was able to build power plants in resource-rich and sparsely populated areas in the western region, and transmit electricity

Third, the power structure is gradually transforming into new energy

Xinjiang's installed power capacity increased from 14.
07 million kilowatts in 2010 to 109.
03 million kilowatts at the end of January 2022, of which the installed capacity of new energy power generation reached 37.
18 million kilowatts, and the utilization rate of new energy increased from 63% in 2016 to 94%, and the transformation of regional energy structure has achieved remarkable
results。 Of the 503.
7 billion kWh of electricity sent by Xinjiang Electric Power Delivery, wind and photovoltaic power generation reached 137.
8 billion kWh
.
These new energy appliances are equivalent to about 41 million tons of standard coal burning in China, reducing carbon dioxide emissions by about 110 million tons, sulfur dioxide by 350,000 tons, and nitrogen oxides by 300,000 tons, which has helped China's energy green and low-carbon transformation
.

In Xinjiang's Hami region is rich in wind energy resources, thirteen Fangfeng District is the famous "100-mile wind area" in Xinjiang, with an average wind speed of more than 8.
46m/s for many years, and excellent
wind energy resources.
Hami has Santang Lake Wind Zone, Naomao Lake Wind Zone, 13 Fangfeng District and Southeast Wind Zone among the nine wind zones in Xinjiang, with a technological development volume of 75.
498 million kilowatts, accounting for about 62.
9%
of the total technological development volume in Xinjiang.
With the continuous construction and improvement of the power grid, relying on the Hami 750 kV substation has built a 220 kV ring network, and the Hami City is connected to the Shanshan 750 kV substation to the west, forming a grid pattern of east to west, and the wind power transmission capacity has been continuously improved
.

In order to meet the needs of large-scale development of new wind power and new energy, the State Grid Hami Power Supply Company has repeatedly implemented reconstruction and expansion projects for thirteen substations, which has greatly guaranteed the delivery
of new energy.
Since 2010, 450,000 kilowatts
of wind power have been installed in the thirteen-room area of Hami City.
14 wind power development projects with a total installed capacity of 1 million kilowatts in thirteen house wind zones have entered the construction stage
.
According to statistics, in the first quarter of this year, Hami Xinjiang sent 15.
943 billion kWh
of electricity.
Among them, the delivery of new energy is 3.
653 billion kWh, accounting for 23%
of the total amount of electricity sent.
Hami new energy enterprises generated 5.
23 billion kWh, of which 4.
6 billion kWh of wind power generation, and the highest single-day power generation of wind power reached 12 million kWh
。

The accelerated expansion of the new energy industry has led to the rise of Xinjiang's new energy equipment manufacturing industry, realized the green development of power plants, implemented energy-saving and emission reduction policies, and increased investment in environmental protection facilities, thereby improving the level
of cleaner production of power plants 。 Promote the project planning and construction of wind, light, fire and storage multi-energy complementary integration, vigorously promote the construction of resource-saving and environment-friendly enterprises, increase investment in technological transformation, reduce coal consumption, electricity consumption rate, water consumption and other consumable indicators, adopt advanced and efficient dust removal and desulfurization, low-carbon combustion and other environmental protection new processes, new technologies, and new equipment, strictly control the concentration and total amount of pollutant emissions, and promote the green development
of cleaner production in the whole process 。 According to the data, with the construction of the four major channels of "Xinjiang power transmission", more than 20 enterprises such as Guodian, China Power Investment and Datang have increased investment and expanded the capacity of coal, wind power and photovoltaic power generation projects in Xinjiang, directly driving investment in related industries by 101.
8 billion yuan.

"Xinjiang power transmission" is of far-reaching significance to the optimal allocation of energy in China, Xinjiang is rich in energy resources, has the conditions for large-scale development of coal power and wind power, and is suitable for local power generation
。 Catch the fast lane of UHV power transmission, implement large-scale "Xinjiang electricity transmission", promote the intensive development of Xinjiang's energy base, and transform Xinjiang's resource advantages into economic advantages
.
However, the contradiction between power supply and demand in the eastern region is tense, land resources are scarce, and environmental pressure is large, and it is no longer necessary to further expand the installed capacity of thermal power, and a large amount of external electricity
is urgently needed.
"Xinjiang electricity transmission" has effectively alleviated the contradiction between energy supply and demand in East China and other regions, supported local economic growth, and is a win-win result
for the eastern and central and western regions.
At the same time, the UHV power grid has huge investment, significant medium- and long-term economic benefits, and has the characteristics of long industrial chain and strong driving capacity, which can drive the transformation and upgrading of the equipment manufacturing industry in the upstream and downstream industrial chains such as power supply, electrical equipment, and energy-using equipment, and play an important role
in stabilizing the economy, adjusting the structure, and benefiting people's livelihood.
(Analyst Guo Zhen)

Transferred from: Xinhua Finance