CIGRE B4 AG-04: HVDC and FACTS Performance

CIGRE B4 Advisory Group AG-04 was formed specifically to assemble and publish data on the reliability and operational experience of HVDC systems in service around the world. The Advisory Group developed definitions for the reliability terms and parameters and prepared a protocol for collecting and compiling the data. The first data were collected in 1968, covering 4 HVDC systems utilizing mercury arc valves. The survey data is published every 2 years at the CIGRE Session in a paper titled, “Survey of the Reliability of HVDC Systems throughout World“. AG-04 has also published a protocol for FACTS reliability and started collecting data several years ago. The HVDC Compendium, which was initiated in 1982 to supplement the HVDC performance data with single line diagrams and other technical information on specific HVDC systems, is also the responsibility of AG-04.