6Song Ruihua,Zheng Chao,Li Ruomei,et al.VSCs based HVDC and its control strategy[C].Transmission and Distribution Conference and Exhibition(Asia and Pacific),Dalian,2005,1:1-6.
7Eriksson K,Weimers L.Gotland HVDC light transmission-world's first commercial small scale DC transmission[C].CIRED Conference in Nice,France,1999.
8Schettler F,Huang H,Christi N.HVDC transmission system using voltage sourced converters design and application[C].Proceedings of IEEE 2000 PES Summer Meeting,Seattle,2000,2:715-720.
9Sidori A.Nonlinear control system[M].London:Springer-VerJag,1994.
10Petitclair P,Bacha S,Rognon J P.Averaged modelling and nonlinear control of an ASVC(advanced static var compensator)[C].IEEE Power Electronics Specialists Conference,Baveno,1996,1:753-758.