Industry news
UHV: the "national card" of China's high-end manufacturing

Source: economic reference 2016/9/26 8:20:31

Speaking of the world's leading "made in China", the most likely response of ordinary people is high-speed rail and space. But many people don't know that China's UHV transmission is also a "business card" that China takes the lead in the high-end manufacturing field.

After more than ten years of unremitting efforts, China has mastered the core technology of UHV, becoming the world's first and the only country to successfully grasp and apply UHV technology. This allows the Chinese "UHV" to shout out completely, "the standard of China is the world standard".

The Chinese standard is the world standard

In Hebei, Dingxing County, Baoding City, a named "Beijing West" 1 million volt substation has been basically completed, waiting for the completion of commissioning began to send electricity. In layman's view, this is not very different from other substations, but the area is large, and they are also built on a dense tower, lined with rows of wires. But a glance at the inside can see the difference.

This is the world's highest voltage substation, and the internal equipment is fully domestically made. In the field of substation can be said to be spotless, if careful can be found, the square column column surface cement walls not only straight and smooth as a mirror, although more than ten meters high, but without any seams, it is very difficult to do, need high technology and process. This point, even the world's expert came to thumbs.

"In the field of UHV power transmission, we can proudly say that Chinese standard is the world standard, UHV State Grid Corporation of Hebei command deputy commander Zhang Guilin said, China in the world leading position in the field of UHV power transmission, currently operating on the international field of UHV power transmission construction, many aspects of the international standard are from China.

The installation of GIS equipment in 1 million volt substation is an international problem, because GIS equipment requires very high environmental requirements during the installation process, and requires a dust free standard. Otherwise, short circuit will happen in the operation of power plants, causing major accidents and losses. In order to solve this problem, the national network of Hebei company responsible for the construction of the creative all-weather multi-functional assembly building technology at the installation site laying track, then closed the plant built in orbit, installed a mobile section, after the completion of the construction can be removed to remove.

Reporters at the scene saw that entering the mobile factory had to pass several passes, not only to wear the closed work clothes, but also to isolate the blow before entering, so as to prevent dust from entering. Although it is a mobile workshop, but the internal equipment is complete, it can effectively realize the dust free operation, constant temperature and constant humidity, in order to ensure the safe installation of the equipment.

The cylindrical GIS equipment has a total length of hundreds of meters, and the weight of a single segment is about 10 tons. However, during installation, we must achieve horizontal error of not more than 2 millimeters, otherwise it will fail in operation. In order to overcome this problem, the construction technology innovation of Hebei construction company has invented the installation of stabilisation rack, which can effectively guarantee the installation error below 2 mm.

In order to effectively achieve long distance and large capacity transmission demand, the construction of 1 million volts and high voltage can be said to be strives for perfection. From small to millimeter to 100 tons, difficulties are everywhere, and innovation is everywhere. A tower with a height of 114.6 meters and a weight of 431 tons is close to completion on the top of Taihang Mountain in Xingtai County, Xingtai. Several tons of steel pieces are transported to the mountain by the temporary heavy cableway.

As a world standard, UHV is an innovative technology developed by the national Power Grid Corp independently and widely applied. It solves the problem of domestic energy imbalance and achieves the optimal allocation of energy resources in a wider range. At the same time, China's modern power grid technology, including UHV and smart grid, provides a realistic alternative for developing renewable energy bases worldwide and building global energy Internet in the future. Liu Zhenya, the former chairman and Secretary of the Party group of the national Power Grid Corp, said at the 2014 Paris business and climate summit that to build the global energy Internet, we must use UHV. UHV is a unique technology in China, with the development of all human beings, and China is willing to share this advanced technology with the whole world.

Carrying out the idea of "green construction" with the spirit of the craftsman

"As the world's highest voltage transmission and transformation equipment, the requirement is very precise. We must be" artisan spirit "to ask ourselves, for every link, no matter the size, we should be professional, dedicated and attentive. Zhang Guilin said.

Zhang Guilin introduced that the former power plants were built on the edge of the city, and then shipped coal to generate electricity, so the city was polluted. Now power plants are built in sparsely populated areas, and substations are built on the side of the city to transport the power plants to the cities, so that they are more environmentally friendly than before, but this is not enough. They must also achieve green environmental protection in the process of construction.

"The premise is green construction, that is to pay attention to green environmental protection in construction, and the green construction we are now putting forward is green environmental protection from design, construction, products to operation and management process." Zhang Guilin said, green building is the concept of sustainable development in the construction of power grid development embodied in the whole process, and not just in the engineering construction of a closed construction, eliminate dust, reduce the noise, it is not only in the site around the flowers and grass, regular watering, but all aspects including sustainable development, such as ecological and environmental protection, resources and energy utilization, social and economic development.

Before the construction land is the direct construction, so easy to land the upper soil tillage and tillage planting, the formation of twenty or thirty years to soil, now is the first construction will land on 60 cm soil taken out to local governments to protect farmland, soil is under the earth, used to backfill. In this way, it covers an area of 200 mu, but can regenerate 200 acres of good farmland, greatly saving the resources of cultivated land.

Not only in the area of land saving, in water saving, material saving, energy saving and environmental protection, the Hebei company of the national network has made strict regulations in the whole construction process.

Look at Taihang Mountain that most of the more than 400 tons of the tower will find that it is a "short leg", the four tower is not in a plane, but some high and some low tower, tower. "This is also to protect the mountains to the maximum extent. Before the construction in the mountains, basically put the whole mountain flat, then build the tower in a plane. So much damage to the mountain, and the rest of the gravel and slag directly along the hillside down the hillside, the vegetation is destroyed, "Zhang Guilin, now according to the different mountain to measure to determine each Taki position, so that we can minimize the destruction of the mountain. And after the end of the construction, the grass is re - planted in the mountains to ensure that the mountain vegetation is not destroyed.

Not only that, the idea of green is also reflected in the details of all aspects. In the 1 million volt substation of Shijiazhuang in Xingtai, Xingtai, the firewall of the transformer is not flat, but like a hedgehog. The brick of the wall is regularly emerging, and it is an innovation of Shijiazhuang Railway Station. The reason to do so, because there is a transformer noise during operation, while the substation is built in the wilderness, but in order to minimize the noise nuisance, the firewall wall built so you can maximize the contact area of the wall, the noise can play a certain role in the adsorption.

The rest such as sewage intelligent zero emission treatment technology, green lighting technology, building material energy saving and so on have become the standard configuration in the construction process. And the most important thing is not only to carry out the green concept in the construction of such a 1 million volt large substation, but also to implement the green concept in the construction of various levels of projects.

"Even if a pole is built, we all have to ensure the idea of implementing green construction," Zhang Guilin said.

A guide to the global energy Internet

UHV, as the most advanced transmission technology in the world, has many outstanding features, such as large capacity, high efficiency, low loss, long distance and so on. This also creates conditions for the construction of the global energy Internet.

The global energy Internet is a global energy infrastructure. It is a radical solution to solve the dilemma of fossil energy and achieve sustainable and coordinated development of energy, economy, society and environment. For example, about 60% of Hebei's pollution comes from coal and fuel, which is 20 percentage points higher than the national average. The construction of the global energy Internet will form a new pattern of electricity - centered and clean energy, which can effectively promote the improvement of the environment in Beijing, Tianjin and Hebei. At the same time, it is conducive to the digestion of Hebei iron and steel, cement and other excess capacity.

The national Power Grid Corp chairman, party secretary Shu Yinbiao went to Beijing SETRA high voltage substation China research said, more than 75% of the energy resources in the West and North, and the main load center in the East, west energy UHV technology will be sent to the eastern, Eastern to meet the demand for electricity, to solve the problem of haze and pollution. At the same time, the global energy Internet is an important part of Belt and Road Initiative strategy, power grid interconnection wider scope, is not only feasible, but also can be realized.

The national Power Grid Corp has signed a cooperation agreement with many international research institutions such as the International Energy Agency and the National Renewable Energy Laboratory, to participate in the construction of the European super power grid, and to carry out the research on the key technologies of the global energy Internet.

At present, the development of UHV has risen as a national strategy, China has mastered the key technology of UHV core, and built a number of world-class innovation projects, to further accelerate the development of UHV, the global service in the country, to promote the supply side structural reforms, "The Belt and Road" construction, the coordinated development of Beijing Tianjin Hebei, Yangtze River Economic with the construction and revitalization of northeast old industrial base and other major strategy play a key role in solving the security problem of power and optimize the allocation of energy resources is of great significance to solve the problem of network security and clean development etc..

The general manager of Hebei Liu Kejian said the company will vigorously promote the "UHV spirit" and innovation of the artisan spirit, advocating "green building", and strive to create quality engineering, benchmarking project, demonstration projects for building global energy Internet, to achieve more extensive network interoperability contribute.

It is estimated that from 2016 to 2030, the total investment of UHV will reach 2 trillion and 220 billion yuan, and 10 thousand yuan to 750 thousand volts will be invested 4 trillion and 500 billion yuan, and the total investment of clean energy development in the western region is 5 trillion and 600 billion yuan. Each year, it can boost GDP by about 0.6 percentage points and provide about 1 million 400 thousand jobs.