Prediction of Reliability and Availability of HVDC Valve and HVDC Terminal

An availability and a reliability prediction has been made for a high-voltage direct-current (HVDC) terminal containing silicon controlled rectifiers (SCRs). This prediction was made using published failure rates for the electronic equipment. Published failure rates and outage duration times were used for such ac equipment as power transformers and power circuit breakers. Actual field failure rate data were used for the SCRs. Estimates were used for the time that it would take to replace electronic equipment in order to get back into service.