A Decompositon Method for Weekly Unit Commitment Considering Hydro Power Characteristics

With the development of hybrid power system, its unit commitment (UC) faces the problem of large scale and high complexity. This paper proposes an ADMM-based method to decompose the problem to smaller scale while obtaining the same result. Considering the cross day adjustment characteristic of hydro power, the UC through one week or longer period is broken down to each single day. By obtaining the scheduling solution and hydro power distribution plan alternatively and iteratively, the final solution with high precision can be determined. The case studies prove the effectiveness of the proposed method.