UHV: Electrical equipment ushered in industrial upgrading

In the 8 years from this year, the State Grid will invest about 1.2 trillion yuan, put into operation 94,000 kilometers of UHV lines, convertible capacity of 320 million kVA, and 460 million kilowatts of converter capacity, by 2015, 2017 and 2020 It will build a “two vertical and two horizontal”, “three vertical and three horizontal” and “five vertical and five horizontal” UHV “three China” synchronous power grids respectively, and at the same time it will build 27 UHV DC projects by 2020.

With the continuous approval and construction of UHV projects, China's electrical equipment manufacturing industry has also ushered in the spring of development. The successful development of UHV power transmission equipment has changed China's long-term development model of "advancement of technology, digestion and absorption" from developed countries in the field of electrical equipment manufacturing, achieving a comprehensive breakthrough from basic research to engineering practice and achieving "China's Creativity". And "China leads."

I. Breakthroughs in Technical Equipment Upgrades On March 21, 2005, the then State Council Vice Premier Zeng Peiyan presided over a special meeting to hear the State Grid Corporation UHV work report. The Minutes of the meeting pointed out that the development of UHV power grids is a concrete embodiment of the implementation of the scientific development concept by the power industry, an important guarantee for the continued growth of China's electricity demand in the future, and an effective way to optimize energy allocation in China.

The UHV, which was a brand new thing in the country at that time, began to gradually enter people's field of vision. Since then, according to the requirements of the National Development and Reform Commission, China Machinery Industry Federation has conducted a serious investigation on UHV. The focus of the investigation is on the feasibility of independent R&D, self-manufacturing, and partial introduction of foreign advanced technologies for domestic UHV equipment, and the production required for localization. , test conditions, and delivery schedules.

"Compared to the production of power generation equipment, China's power transmission and transformation equipment industry is lagging behind that of developed countries. Through the development and production of UHV power transmission equipment, this lesson will be supplemented to enable simultaneous development." The former National Machinery Industry Deputy Minister Lu Yanzhen said after the investigation.

Since the country agreed to start the UHV work in 2005, there have been more than 3,000 academicians and engineering technicians, including 11 institutions at home and abroad, including more than 30 academicians, who have participated in the UHV demonstration, and the major domestic electric power scientific research and design institutes. Nine universities participated in UHV research and design, more than 500 construction units and tens of thousands of people participated in the construction of UHV projects, and more than 200 equipment manufacturers participated in the development and supply of equipment.

It's hard to imagine how hard it is to move forward in the process of exploration. Although the U.S., the Soviet Union, Italy, Japan, and other countries have conducted research on UHV transmission technologies, overall, UHV development in foreign countries is still in experimental research and practical exploration, and there has been no breakthrough in commercial applications.

"Every equipment we have encountered in the UHV transmission is new. In the past, we were not only not our own, but also not abroad. For so many years, foreign countries have no longer studied it. There are no products available for reference, nor are they available for reference. Reference to the technical experience or standards, we must be independent innovation. Independent innovation, especially equipment, the difficulty is very great." Deputy director of the company's exchange and construction department, UHV AC transmission project second finisher Chen Weijiang said.

In the following years, through the arduous efforts of scientific research personnel and manufacturers, China’s UHV technology has made a major breakthrough, fully grasped the UHV core technology and a full set of equipment manufacturing capabilities, and realized UHV transformers and reactors, 6 inches. Thousands of key equipment such as thyristors and large-capacity converter valves have been independently developed and manufactured, which has completely broken the long-standing technological monopoly of foreign manufacturers such as ABB and Siemens. The localization rate of the 1,000 kV UHV AC pilot demonstration project in Jindongnan-Nanyang-Jingmen reached more than 90%, and the localization rate of Xiangjiaba-Shanghai ±800 kv UHV DC demonstration project was close to 70%.

If UHV AC and DC demonstration projects were completed and put into operation to achieve a historic breakthrough in China's UHV from scratch, then the stable operation of the above two projects since they were put into operation fully demonstrates the reliability of our own research and development equipment. Sex, enough to meet the requirements of the operation of the big grid. The successful R&D of UHV power transmission projects has greatly enhanced the R&D and manufacturing capabilities of domestic equipment manufacturers for key equipment, led to the full upgrade of China's power transmission and transformation equipment manufacturing industry, and achieved U.S. high-tech R&D design, manufacturing processes and test detection capabilities. Level, the power grid technology has achieved a major shift from introduction to output, from catch-up to lead.

The R&D results of UHV equipment are also applied to the technical upgrade of ultra-high pressure equipment. Luo Mohui, chief analyst of Jinmo Energy Network, said that the domestic backbone electrical equipment manufacturing enterprises took the lead in forming the core competitiveness and had mastered the domestic market dominance, and fully entered the international market, achieving a breakthrough in the export of high-end products. Since 2009, despite the continuous impact of the international financial crisis, China's UHV and ultra-high pressure main equipment manufacturers have seen a rise in exports. The export of 500 kV and above equipment products has reached 10 billion yuan, and the annual growth rate has exceeded 40%. The successful overseas projects are distributed in North America, Central Asia, the Philippines, India, Brazil and other countries and regions. UHV and ultra-high voltage equipment has become a powerful weapon for domestic companies to open up the international market.

Second, to lead the establishment of an international standard to lead the world. This is the goal of today's increasingly powerful China in all areas. For UHV transmission technologies and equipment, China has become a truly global leader.

According to the special report of the International Power Grid Committee, “The important breakthroughs in UHV key technologies and equipment are of great significance for promoting the research and application of UHV transmission technology worldwide. It is a great technical achievement and it is the power of the world. Milestones in the history of industrial development.” Nobel Prize-winning physics, the United States Secretary of Energy Zhu Yuwen also made no secret of China's achievements in the field of UHV transmission: “China’s challenges to the U.S. leadership in innovation and the rapid development of related areas include: Voltage, maximum delivery capacity, lowest loss UHV AC, DC transmission."

In recent years, under the background of the state encouraging enterprises to actively implement the "go global" strategy, the company has accelerated the pace of internationalization. From the Philippines to Brazil, from Portugal to Australia, from Russia to Venezuela, international business has continued to break through from point to point. In this process, it is particularly important to actively participate in the formulation of international standards for energy and power, promote the conversion of UHV and other advanced technological achievements into international standards, and increase China’s influence and discourse in the international electrotechnical field.

Strengthening standard construction can, on the one hand, reduce business development costs, ensure the quality of products and services, better meet customer needs, and establish a good brand and image; on the other hand, it can increase market access barriers and foster and create competition. The unique competitive advantage that opponents can't imitate. Once the corporate standards have risen to industry standards, national standards, and even international standards, they will occupy a very favorable position in the domestic and international market competition, winning more development opportunities and a broader market space. "Enterprise Standardization-Standard Internationalization-Enterprise Internationalization" has become an important strategy for companies to gain a dominant position in international competition.

In the face of rare opportunities, the company continued to push forward the research and development of UHV technology and equipment, and took the lead in establishing a complete UHV transmission technology standard system in the world. Among them, the UHV AC technical standard system consists of 7 categories and 77 standards. The UHV DC technology standard system consists of five categories and 123 criteria. UHV AC 1000 kV voltage becomes the international standard voltage.

In addition, the International Power Grid Commission and the Institute of Electrical and Electronic Engineers have established eight UHV working groups led by Chinese experts and are currently leading the preparation of relevant international standards. There are 38 Chinese experts who have joined the International Power Grid Working Group and the International Organization for Standardization. China has become a permanent member of the International Electrotechnical Commission, two secretariats of the International Electrotechnical Commission are located in the State Grid Corporation of China, and Shu Yinzhao, deputy general manager of the State Grid Corporation of China, has served as vice chairman of the International Electrotechnical Commission.

From the international standard receiver to the international standard setter, in the global competition in the electrician industry, China will undoubtedly win the initiative.

Third, the development of a broad market space At present, the focus of China's energy development gradually moved westward and northward, while the basic pattern of load center in the eastern and central regions will not change for a long time. Large-scale energy, long-distance transmission and large-scale optimal configuration are historically inevitable. . In addition, the contradiction between coal and electricity transportation still exists, and the “bottleneck” problem of southwest hydropower, Inner Mongolia, and Northwest Electric power delivery is becoming increasingly prominent. Especially with the rapid development of new energy, the installed capacity of wind power will exceed 200 million kilowatts in 2020 and the photovoltaic power generation will exceed 50 million. Kilowatts, must rely on large power grids, large markets to optimize the configuration and consumption.

The UHV power grid is conducive to the optimal allocation of power resources in a wider range, which is conducive to saving line corridors and saving land resources, saving investment in the construction of the power grid and operating costs, reducing the impact of coal power on environmental pollution, and accelerating construction. The voice of high-voltage power grids is growing louder and louder.

In the next 8 years, the development of UHV power grids will be accelerated, and the electrical equipment manufacturing industry will also usher in a golden period of development with a vast market development space. Domestically produced equipment manufacturing companies represented by Nan Rui, Xu Ji, and Ping Gao have already With the large-scale application of UHV technology, the technology can be quickly converted into mass production capabilities, ready to invest in new challenges.

At the same time, the development of UHV technology in China has attracted the attention of countries in the world. Countries such as India, Brazil, Russia, and South Africa have proposed plans or plans for long-distance and large-scale power transmission using UHV technology. Enterprises and organizations in the United States, the European Union, and other countries and regions have also strengthened their UHV transmission technologies with China. Cooperation. In February 2010, Shenyang Tebian Electric Engineering Co., Ltd. successfully obtained over US$100 million UHV power transmission and transformation equipment procurement contracts from State Grid Corporation of India. This is not only the first time that India has purchased UHV power transmission and transformation equipment from Chinese companies, but also the first time that Chinese companies have exported high-end UHV power transmission products to foreign countries.

Looking around the world, energy science and technology innovation is in a new active period. The current lead does not mean eternal lead. Any company that wants to take the initiative in this competition must form a close chain between basic research, technology research and development, achievement transformation and industrialization, and do a good job in all aspects. Only by bringing together all forces can we always walk in the spring of great development.