Reliability evaluation of multi-terminals VSC-HVDC system

Abstract

Reliability evaluation of VSC-HVDC system with multi-terminals has received very little attention in the past. In this paper, an equivalent model is developed for evaluating the reliability of VSC-HVDC system, especially multi-terminals VSC-HVDC system. Using the reliability engineering concepts, such as the method of component equivalents and the frequency and duration method, some reliability indices, such as forced outage rate and frequency of each terminal, are calculated and the capacity outage probability table can also be obtained. Case studies are numerically applied on two VSC-HVDC systems which have different terminals and results are analyzed. At last, sensitivity analyses for forced outage rate and frequency with respect to the failure rate of different components are conducted.