Capacity Benefit Margin (CBM) assessment incorporating tie-line reliability

Capacity Benefit Margin (CBM) plays an important role in available transfer capability (ATC) computation. CBM is a transmission capability margin reserved by load serving entities to meet the generation reliability requirements. In recent years, there are several methods developed to compute the CBM. However, the methodologies do not consider the reliability of an interconnected system in the CBM determination. This paper presents the computation of CBM considering the reliability of an interconnected system. It is important to consider the reliability of an interconnected system in the CBM determination because the interconnected system is used as a medium in transferring the power to an area in order to overcome the deficiency of generation reliability. The modified IEEE 24-bus Reliability Test System (RTS) is used to demonstrate the effectiveness of the proposed method in determining the CBM considering reliability of an interconnected system.