A hybrid deterministic/probabilistic technique for HVDC system reliability evaluation

This paper extends the conventional probabilistic approaches for reliability evaluation of high voltage direct current (HVDC) transmission systems by including acceptable deterministic criteria in the stochastic evaluation of the reliability indices. The operation of the HVDC transmission system is categorized into three operating states designated as healthy, marginal and at risk. The well-being of the system is quantified using the healthy and marginal states in addition to the existing conventional risk index. A brief discussion on the modeling techniques used to translate the single line diagram of an HVDC system into a reliability diagram is also presented. The impact on the system well-being of factors such as component failure rates and repair times is also illustrated. The proposed technique is illustrated by application to a hypothetical system.