  This paper reviews methods that are used for adequacy risk assessment
considering solar power and for assessment of the capacity value of solar
power. The properties of solar power are described as seen from the perspective
of the power-system operator, comparing differences in energy availability and
capacity factors with those of wind power. Methodologies for risk calculations
considering variable generation are surveyed, including the probability
background, statistical-estimation approaches, and capacity-value metrics.
Issues in incorporating variable generation in capacity markets are described,
followed by a review of applied studies considering solar power. Finally,
recommendations for further research are presented.
