Security-Constrained Unit Commitment Problem including thermaland pumped storage units: An MILP formulation by the application oflinear approximations techniques

ÁLVAREZ, GONZALO E.; ÁLVAREZ, GONZALO E.; MARCOVECCHIO, MARIAN GABRIELA; MARCOVECCHIO, MARIAN GABRIELA; AGUIRRE, PÍO ANTONIO; AGUIRRE, PÍO ANTONIO

ELECTRIC POWER SYSTEMS RESEARCH

ELSEVIER SCIENCE SA

Lugar: Amsterdam; Año: 2018 vol. 154 p. 67 - 74

0378-7796

This paper presents a new approach for solving Security Constrained Unit Commitment (SCUC) problemsbased on the application of several linear approximation techniques. Model considers thermal units,transmission constraints, and Pumped Storage Units (PSUs), which are important in power systems dur-ing peak and off-peak demand periods. Particularly, the proposed MILP model takes into account thehydraulic heads of PSUs for generating and pumping modes through linear methods of operation pointselection. Therefore, a more realistic model is presented in comparison with other models available inthe literature. To verify the effectiveness of the proposed approach, a modified IEEE 31-bus power systemwith two PSUs is tested. Our results indicate that the implementation of PSUs can achieve productioncost savings compared with power systems in which thermal generation supplies the entire electricitydemand. For improving the power system operations and maintenance, different indicators obtainedfrom results are reported in graphs. This information is useful to identify the most critical parts of thesystems and make recommendations for corrective or future actions.