Uncertainty Costs of Wind Power Generation Considering Expected Energy not Supplied under Different Spinning Reserve Levels

Nuntiya Chaiyabut and Parnjit Damrongkulkamjorn


Wind power uncertainty, Spinning reserve, Reliability, EENS


This paper presents the algorithm which includes the uncertainty of the wind power generation in the conventional unit commitment problem. The wind power uncertainty in each hour is considered as a normal distribution curve along the wind power forecast. The index used to determine the effect the wind power uncertainty has on the system is the cost of Expected Energy Not Supplied (EENS) which is added to the system operation cost. The spinning reserve according to wind power uncertainty is added at different levels as percentages of the wind power installed capacity. The algorithm is tested on the system with five thermal generators and the wind power penetration is assumed to be 25% of total generation. The study gives the minimum total cost which is the summation to generation operating cost, reserve cost and EENS cost.

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