在2000千米長的電力輸電線上實現最低損耗 瑞士蘇黎士2007年12月18日消息，電力自動化技術領先集團ABB，從中國國家電網公司及其同行伙伴處獲得44000萬美元訂單，為世界上最長的電力傳輸線提供超高壓輸電技術。 傳輸線長路長約2000千米（1.240英里），從中國西部到東部工業聚集的沿海地區，傳輸電量可達6,400兆瓦，充分滿足中國近三千一百萬人口的用電問題。從向家壩水力發電站到上海的連接將于2011年完成。 超高壓直流輸電連接由兩個分站和一個在超高壓（800千伏）狀態下利用突破性技術電力傳輸系統組成。其將最小化傳輸過程中的電力損失。 提高電力傳輸的電壓等級可以使環境受到相當大的受益，包括低電量損耗和與傳統高空輸電相比，更少地占用土地。 此項目表現了電力傳輸技術上的極大突破： • 在現在，6400兆瓦級比強大電力級的兩倍還多。 • 2000千米的輸電線是世界上最長的一條輸電線。 • 傳輸損耗將少于7％，明顯低于由傳統的500KV高壓直流輸電造成的損失。利用超高壓直流輸電與高壓直流輸電相比所帶來的節省，將相當于中國900000人口一年的電力損耗。 ABB電力系統部門領導Peter Leupp說：“超高壓輸電對于在偏遠地區進行有效水力發電是個關鍵性的新技術。ABB在此項目中辦演著非常重要的角色，ABB還支持世界上人口稠密地方的經濟發展，同時降低對環境影響。” 超高壓直流輸電是高壓直流輸電的深一層開發，ABB是此技術的創始人，已有50年的歷史。此新技術利用半導體閥，安裝在新近開發的六英寸的半導體上（功率半導體）和一個高級控制系統上，基于重多領域的研究（包括室外絕緣體和具有超高計算能力的高級控制系統），增長成為可能，在20年內實現最大的容量和效率傳輸。 [FONT=times] original text [/FONT] [font=times] ABB wins orders worth $440 million in China for world’s longest power link [/font] [font=times][Color=#708090]Technology leap allows low-loss transmission on 2,000-kilometer power link Zurich, Switzerland, Dec. 18, 2007 – ABB, the leading power and automation technology group, has won orders worth $440 million from the State Grid Corporation of China and other partners to provide new ultrahigh-voltage technology for the world’s longest power transmission link. The power superhighway running 2,000 kilometers （1,240 miles） from western China to the highly industrialized coastal area in the east, will have a capacity of 6,400 megawatts （MW）. That is enough to meet the needs of about 31 million people in China, based on average consumption per capita1. The link from the Xiangjiaba hydropower plant to Shanghai is scheduled for completion in 2011. The ultrahigh-voltage direct current （UHVDC） link comprises two substations and a power transmission system using breakthrough technology to transmit electricity at ultrahigh voltage （800 kilovolts）, which will minimize the amount of power lost in transmission. Increasing the voltage level of electrical transmission creates considerable advantages for the environment, including lower electricity losses and the use of less land compared to traditional overhead lines. UHVDC is particularly suitable for vast countries like China, where the centers that need power are often located far from power sources. This project represents a number of breakthroughs in electrical power transmission: • The 6,400 MW power rating is more than double the most powerful rating in operation today • At 2,000 km, the transmission line will be the longest in the world • Transmission losses will be less than 7 percent, significantly less than the losses from conventional 500-kilovolt （kV） high-voltage direct current （HVDC） transmission schemes. The savings from using UHVDC compared with HVDC are equivalent to the annual power consumption of more than 900,000 people in China. “Ultrahigh voltage transmission is a vital new technology for the efficient use of hydropower generated in remote areas,” said Peter Leupp, head of ABB’s Power Systems division. “ABB technology, which plays an essential role in this project, can support the economic development of some of the world’s most populous regions, while lowering environmental impact." UHVDC transmission is a further development of HVDC, a technology pioneered by ABB more than 50 years ago. The new technology, using thyristor valves equipped with newly developed six-inch thyristors （power semiconductors） and an advanced control system, allows the biggest capacity and efficiency leap in 20 years. The increase became possible following advances in basic research in a number of fields, including the development of new materials for outdoor insulators and advanced control systems with extremely high calculation capacity. [/color][/font]