Redespacho termelétrico através de avaliação de regiões de segurança em tempo real

Abstract

The optimization of the operational cost of large-scale electric power systems is the subject of academic research to improve planning and control operations in real time, in order to obtain the appropriate amounts of generation from each plant to supply demand at every moment without compromise dynamic security in the face of contingencies, what is called economic dispatch. In Brazil, a country with a privileged predominance of hydroelectricity, one of the thermoelectric dispatches occurs exclusively to increase the electrical safety of operation of the Brazilian Interconnected System (SIN), regardless of the operational cost of the thermoelectric plants. In practice, this can compromise economic dispatch, since the conditions observed in real time are often not different from those considered by the operation planning. In this context, this dissertation presents the use of the safety assessment tool to perform thermoelectric redispatch for complete grid and altered grid by contingency in real time. The calculation of dynamic safety regions in real time using ORGANON is based on the graphical estimation of new points of operation, prioritizing operational safety to increase or reduce the use of thermoelectricity. The successive analyzes of the safety regions simulated with the thermoelectric redispatches considered consist of an empirical iterative algorithm. There was satisfactory application of this methodology in a Brazilian test system of 107 bars and in an electrical area of the SIN, both for complete grid and an altered grid. This research encourages studies of new practices that converge to obtain an economic dispatch updated in real time, with the intention of using the system more efficiently and reducing tariffs to the final consumer.