4IEEE 1240-2000 IEEE guide for the evaluation of the reliability of HVDC converter stations.2000.
5CHRISTOFERSEN D J,VANCERS I,ELAHI H,et al.A survey of the reliability of HVDC systems throughout the world during 1997 ~ 1998[R/OL].[2007-02-01].http://www.cigre.org.
6VANCERS L,JCHRISTOFERSEN D,LEIRBUKT A,et al.A survey of the reliability of HVDC systems throughout the world during 1999~2000[R/OL].[2007-02-01].http://www.cigre.org.
7VANCERS L,JCHRISTOFERSEN D,LEIRBUKT A,et al.Survey of the reliability of HVDC systems throughout the world during 2001 ~ 2002[R/OL].[2007-02-01].http://www.cigre.org.