Utility Analysis of Wind Generation Time-domain Correlation Information for Stochastic Unit Commitment

Abstract

The scenario-based stochastic unit commitment (SBS-UC) is an effective approach to solve unit commitment considering wind power integration. SBS-UC can make full use of the probability distribution characteristics of wind farm output power, and thus optimal unit commitment results in statistics can be obtained. The SBS-UC has aroused widespread concerns, because the application effect of SBS-UC has a close relation with the formation mode of scenario set. Therefore, constructing the reasonable scenario set is a key problem which must be solved in the SBS-UC. Test scenario set 1 is obtained according to probability distribution of each period, without considering the time-domain correlation information of wind farm output power. Conversely, test scenario set 2 contains time-domain correlation information of wind farm output power through estimating the correlation coefficient matrix. Thus, based on the same SBS-UC model, the scheduling results of two different scenario sets under different formation modes are compared to emphasize the important role of time-domain correlation information of wind farm output power in the problem of unit commitment considering wind power integration.