Effects of wind power on day-ahead reserve schedule

The impact of wind power generation on the reserve levels has been studied in this paper through the simulation of a one-year daily unit commitment schedule for a benchmark power system. The case study shows that under the hybrid “N-1” plus “ 3σ ” security criterion, there exists a complex relationship among reserve levels, wind penetration and the relative size the conventional units. When such units are relatively large, they dominate the reserve settings for small levels of wind power penetration. However, in systems where the relative weight of individual generators is smaller, the “ 3σ ” security constraint plays a more conspicuous role even at low levels of wind penetration.