Address at the 2006 International Conference of UHV Transmission Technology
Dong Yongchu Deputy Director General

(Nov. 28th 2006)
Bureau of High-tech Research and Development of Chinese Academy of Sciences

Distinguished guests, ladies and gentlemen,

It??s my great honor to attend the 2006 International Conference of UHV Power Transmission Technology. Today, the experts of electric power industry from all over the world and the leaders of various enterprises get together and discuss and study the UHV power transmission technology. This will definitely has a far-fetching and active influence on the development of electric power in China, and even all over the world. On behalf of Chinese Academy of Sciences, I send my sincere congratulations to the Conference.

Since the reform and opening up in China, the demand of electric power has been keeping a rapid growth with the continuous and rapid development of economy. In 2005, the total electricity consumption and installed capacity reached 2470TWH and 517GW respectively. It is predicted that by 2020, electricity consumption of the whole society will be over 6000TWH and total installed capacity will exceed 1200GW. Therefore, the rapid development of electric power demand poses a new and higher requirement of the power network development. However, considering the present less-developed power network in China, the task of future power network development is still very tough.

China is rich in primary energy resources reserve. The water resources reserve ranks the first in the world, the proven coal resources reserve ranks the third in the world and the coal resources is account for over 90% of the total national fossil energy resources. More than 2/3 of the coal resources are in north China, and 80% of the hydropower resources are in west China. However, more than 2/3 of energy resources demand is focused in the central and east China. Just because of this imbalance between the energy resources and productivity arrangement, the large scale energy resources allocation optimization becomes imperative. In order to meet the needs of large scale electric power transmission, both China and foreign countries made a lot of research on UHV power transmission, superconducting power transmission and flexible AC transmission, etc. among which some technologies have been put into practice. In recent years, State Grid Corporation of China designed to build the UHV networks composed of 1000 kV AC and ??800 kV DC, which will evidently improve the power transmission capability with long distance, big capacity and low loss. Besides, it will also bring the role of power networks in energy resources allocation optimization into full play and will definitely be a significant innovation and breakthrough in electric power industry development. According to the domestic and foreign UHV technology research and construction practice, it is feasible for us to develop UHV power transmission technology and it will bring us a clear economic and social benefit. In the future period, China will actively develop the hydropower resources in southwest China. The total installed capacity of planned first and second period of Jinshajiang hydropower project will reach 38GW, equals to 2 Three -Gorges Project. At the same time, a large scale coal base will be built in northwest China and this will improve China's coal development and utilization efficiency in a coal-fired power integration development manner. Because the northwest coal-fired power base and the southwest hydropower base is 800-3000 kilometers away from the east load center, while the present 500 kV. power networks is limited in long distance and big capacity power transmission ability, it is required to realize the upgrade of power networks technology and develop the UHV power transmission energetically as soon as possible. According to the power networks programming, with the large scale development of southwest hydropower and northwest coal-fired power and the construction of the national UHV power networks, by 2020, the capacity of UHV power networks will have been over 200GW. The prospect of UHV development will be broad in China.

From the development of the world energy resources, the UHV power networks also have a potential development space in south Asia, South Africa and Latin America. For example, the Democratic Republic of Congo, situated in South Africa, is rich in water resources and thus has a good condition for building a large scale hydropower base of over 40GW. However, Congo is about 3000-6000 kilometers away from the load center in Africa; therefore it is clear to see the necessity and advantages of transmitting power by UHV power transmission technology. The utilization and development of UHV power transmission technology is helpful in promoting the resources development and allocation in other countries and regions in the world.

Chinese government attaches great importance to innovations and development in energy resources field and categorizes the study and development of large capacity and long distance DC power transmission technology and equipment into the priority topic of key energy resources field in national middle and long period science and technology development layout program. During the recent years, with the support of the Chinese government, the study of UHV power transmission technology became deeper and deeper and also made a lot of significant research achievements. Moreover, China??s ability in UHV equipment research and developing is also strengthened. All of these established a good foundation for UHV power networks development.

With the Chinese government??s approval of South-east of Shanxi-Nanyang-Jinmen UHV AC experimental demonstration project, the UHV power transmission technology has stepped into the project application period in China. Here I will talk about my understanding of UHV power transmission technology development.

1. Stick to the scientific power development view.

Faced with the rapid growth in electric power demand, we should emancipate the mind and change the view on the basis of the Chinese characteristics, establish a development road for optimizing allocation of energy resources, speed up R&D, popularizing and application of UHV power transmission technology and improve the power networks?? ability in allocating the energy sources.
2. Strengthen theoretical research and consolidate the development base.

Theory is the guide for practice. The development of UHV power networks is a cross-discipline and cross-field systematic project and thus faces many new challenges in programming, design, operation and control etc. Therefore, the strengthening of the basic research of power networks and its related fields, the realization and grasp of power networks safe operation and control mechanism, the realization of the breakthrough of power networks theory and the prediction and solution of the possible problems and difficulties in project design, equipment manufacturing, project construction and operation process are the important guarantees for the scientific development of power networks.

3. Strength the technological innovation and promote the power networks construction.

To strengthen the development of the UHV power networks, the technological innovations must be put in an important place, the UHV technological standard must be established and the key and difficult issues in the development of the UHV power networks must be solved. For example, promote the miniaturization of UHV equipment through the research and application of the new material; improve the supervision and control ability of the power networks through the study and innovation of the power networks online supervision and control measures and thus improve the ability of putting safety within control. Meanwhile we should pay attention to the result transformation and ensure the scientific result plays a more important role in project practice. In the past 2 years, China has made a lot of achievements in the key UHV technological research. In the future, we will focus on the important problems and difficulties encountered in the UHV experimental demonstration project construction, continuously strengthen the scientific research, tackle the key research project and improve the technological innovation ability so as to ensure the smooth progress of the construction and prove the advantages of UHV power transmission technology.

4. Strengthen the international communication and realize the win-win cooperation.

With more and more attention being attached to the UHV power transmission technology, Russia, USA, Japan and some countries and regions in Europe are now energetically making research on this field. In this field, more and more enterprises and organizations are pressing on with the research and development and seek the cooperation with China. To speed up the development of the UHV power transmission technology, China has to learn the advanced experiences from foreign countries. This International Conference of UHV Power Transmission Technology just provides a good opportunity for every country to learn from others?? strong points to offset its own weakness. This kind of mutual-benefit exchange and cooperation does not only good for development of UHV power transmission technology in China, but also play a promoting role for the development and application of UHV power transmission technology worldwide.

The development of UHV power transmission technology is a brand-new project in world electricity power field. Chinese Academy of Sciences will continuously support the UHV power transmission technology in China, and will promote the sustainable development of Chinese electricity power industry and make its contributions to the building of innovation-oriented country and serve harmonious society.

Thank you very much.

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