Reliability evaluation of hybrid multiterminal HVDC subtransmission systems

An approach to determining the reliability of a hybrid multiterminal HVDC subtransmission system is presented. The performance analysis of a multiterminal HVDC subtransmission system is divided into three main segments: the rectifiers, the inverters and the underground cable system. The reliability models associated with the three segments are developed and a reliability evaluation procedure is presented. Two sets of indices, namely the basic load point indices and the system performance indices, are calculated to measure the reliability of a system. The proposed technique is applied to a hypothetical multiterminal HVDC subtransmission scheme and the results are presented.