A study of a ±500 kV, 2400 MW compact converter station

For many years now Cigre has been collecting operating data on existing HVDC systems and periodically publishing updates of that material to the benefit of the entire industry. Recently a utility survey was made of HVDC projects operating worldwide. With the information on these additional important factors, the Cigre data will be more informative and provide increased practical value. This paper addresses four areas-availability, outage rate, thyristor failure rate, and maintainability. The latter will cover spare parts, maintenance staffing and training levels, and maintenance effort. Responses were received from 79 percent of the 42 questionnaires sent out to 37 utilities on 37 HVDC projects-both operating and nearing final construction