Power Reserve Dispatch to Mitigate Variability of Generation Output due to Wind Ramps

Abstract

Flexibility in power systems with high penetration of wind power is the most important factor required for maintaining generation capacity and load balance. Generating reserves play a key role in this new scenario. These must be available not only in terms of quantity, but particularly in their ability to provide a suitable response rate compatible with variations in wind generation, as well as with the phenomenon of wind ramps. The generating units responsible for the AGC may not be able to compensate this variation in generating power. Taking into account, reserves must be redispatched to keep the power balance. However, since reserves have different costs and response ramps, our problem is to find out which reserves have to be redispatched at minimum cost. This paper addresses the question of the optimal dispatch of reserves against wind power ramp events by taking account of operational constraints including interruptible load contracts.