With support from The Three Gorges Office of the State Council, National Development and Reform Commission and State Grid Corporation, a combination formed by our company and ABB Corporation designed and submitted a bid jointly for Three Gorges — Shanghai DC Transmission Project （?500kv，3000a，3000mw）; the XD Transformer Co., Ltd. of the XD Group has obtained manufacture task of 14 converter transformers and 3 smoothing reactors, and the quantities of machines it made are much more than the quantities it made in Three Gorges — Guangdong DC Transmission Project. Significant breakthrough has been made in localization of manufacture of thyristor valve, system research and design of complete set of equipment of converter station: a combination formed by our company and ABB Corporation designed and submitted a bid jointly, 50% thyristor valve used in the project, i.e. twelve lockshield valves, were made by XPR of our company, and thyristor components（348 components totally）of another 50% thyristor valves were also assembled by XPR XIHARI（Xi'an High Voltage Apparatus Research Institute Co., Ltd.）of the company has undertaken system research and design of complete set of equipment of the converter station of the project together with Beijing Wanglian DC Engineering Technology Co., Ltd. Total amount of the contract is USD 114.877 million, which is equivalent to RMB 949.34352 million Yuan according to list price of exchange rate 1: 8.264 of Bank of China on June 16, 2004.
China XD Group’s ability on technology and manufacture of DC transmission has taken three steps through the engineering practice of four ?500kv DC Transmission Projects of Three Gorges-Changzhou, Three Gorges-Guangdong, Guizhou-Guangdong and Three Gorges-Shanghai:
We introduced technology; assembled and manufactured some equipment when we took part in Three Gorges-Changzhou Project;
We jointly designed and independently manufactured converter transformers and smoothing reactors in Three Gorges-Guangdong Project and Guizhou-Guangdong Project.
We have made the depth of localization and manufacture share of domestic manufacturing company taking a step by adopting the ways of joint-design, syndicated tender and independent manufacture in Three Gorges-Shanghai Project, especially the significant breakthrough we made in the aspects of localization of making thyristor valve and system research and design of complete set of equipment of converter station.
Therefore, China XD Group has the ability of designing and manufacturing and supplying converter transformer, smoothing reactor and thyristor valve used in ?500kv HVDC Transmission Project; has two programs for transporting converter transformer and smoothing reactor by rail and by road; can take part in or undertake system research and design of complete system of converter station of ?500kv HVDC Transmission Project.