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SUMMARY Thousand kilovolts of AC transmission has the highest operation voltage and the most advanced technology in the world. Based on 1000 kV Changzhi–Nanyang–Jingmen UHV AC Demonstration Project in China, this paper presents the main design principles and key technical schemes in UHV substation design, including the main electrical connection, the selection of major UHV equipments, overvoltage and insulation coordination, 1100 kV GIS layout, insulator strings design, environmental impact control and seismic design. Copyright © 2011 John Wiley & Sons, Ltd. |