A MILP model for generation maintenance scheduling coordinated with hydrothermal dispatch

• Published in: Energy systems (Berlin. Periodical) 2020-11, Vol.11 (4), p.839-857
• Main Authors: Martínez, María Victoria Ramírez, Zuluaga, Antonio Hernando Escobar, Guimarães, Frederico Gadelha
• Format: Article
• Language: English
• Subjects: Economics and Management; Electric power generation; Energy; Energy Policy; Energy Systems; Hydrothermal systems; Inflow; Integer programming; Linear programming; Maintenance management; Mathematical analysis; Mathematical models; Mixed integer; Operations Research/Decision Theory; Optimization; Original Paper; Preventive maintenance; Schedules; Scheduling
• ISSN: 1868-3967; 1868-3975
• DOI: 10.1007/s12667-019-00342-2

In some real power systems in Latin America, such as those in Brazil, Colombia and Ecuador, the final decision about when to carry out the preventive maintenance is made by the ISO (integrated system operator), in a centralized way. In such a scenario, an optimization model coupling generation maintenance scheduling (GMS) and hydrothermal dispatch (HTD) might lead to lower operation costs from the ISO’s perspective, leading to an optimal solution that might differ from the combined base maintenance schedule (BMS) proposed by the power generation companies. In this paper we develop a mathematical model coordinating the GMS with middle term HTD from the point of view of the ISO. The mathematical model proposed is a mixed integer linear programming (MILP) type that approaches the uncertainty in water inflows through multiple scenarios. The test system emulates a real scale hydrothermal system. The results obtained by the proposed model show operation cost reduction ranging from 5% to as much as 20%, when compared with the BMS proposed by the individual companies.