6Alaywan Z. The Tres Amigas Superstation: Linking renewable energy and the nation's grid (July 2010) [C] //Power and Energy Society General Meeting, 2010 IEEE. IEEE, 2010: 1- 5.
7Tres Amigas LLC. The Tres Amigas superstation project discussion materials[R]. 2009.
8Ingemansson D, et al. The South-West scheme: A new HVAC and HVDC transmission system in Swe- den [C]. AC and DC Power Transmission (ACDC 2012), 10th IET International Conference on. 2012.
9Okba M H, et al. High voltage direct current trans- mission-A Review, part I [C]. Energytech, 2012 IEEE, 29 - 31 May 2012: 1 - 7.
10Okba M H, et al. High voltage direct current trans- mission-A Review, Part II - Converter technolo- gies [C]. Energytech, 2012 IEEE, 29 - 31 May 2012:1 - 7.