Transmission constrained unit commitment method教程.pdfVIP

A Transmission-Constrained Unit Commitment Metho d Chung-Li Tseng, Shmuel S. Oren, Department of IEOR, UC Berkeley, Berkeley, CA 94720, USA tseng@ieor.b erkeley.edu, shmuel@euler.b erkeley.edu Carol S. Cheng, Chao-an Li, Alva J. Svob o da, Raymond B. Johnson Paci c Gas Electric Company, San Francisco, CA 94177, USA Abstract In to days p ower system, generating units of a util- ity company are normally lo cated in multiple areas This pap er presents a transmission-constrained unit that are interconnected via transmission lines. If the commitment metho d using a Lagrangian relaxation ap- transmission constraints are not considered, the sched- proach. The transmission constraints are mo deled as ule obtained might cause some transmission lines to b e linear constraints based on a DC p ower ow mo del. overloaded. In this pap er, we will discuss the unit com- The transmission constraints, as well as the demand mitment problem which takes transmission constraints and spinning reserve constraints, are relaxed by attach- into account. ing Lagrange multipliers. In this pap er we take a new approach in the algorithmic scheme. A three-phase al- The transmission constraints will b e mo deled as lin- gorithm is devised including dual optimization, a fea- ear constraints based on a DC p ower ow mo del. This sibility phase and unit decommitment. A test prob