A ROBUST UNIT COMMITMENT ALGORITHM FOR HYDROTHERMAL OPTIMIZATION

This paper presents a unit commitment algorithm which combines the Lag rangian Relaxation (LR), Sequential Unit Commitment (SUC), and Optimal Unit Decommitment (UD) methods to solve a general Hydro-Thermal Optim ization (HTO) problem. We argue that this approach retains the advanta ges of the LR method while addressing the method's observed weaknesses to improve overall algorithm performance and quality of solution. The proposed approach has been implemented in a version of PG&E's HTO pro gram, and test results are presented.