Planejamento de chaves em redes de distribuição utilizando fluxo de potência ótimo

Abstract

In view of the great relevance of the reliability area of electrical distribution systems for concessionaires and consumers, this work proposes a methodology for planning tieswitches based on the use of Lagrange multipliers obtained from the problem Optimal Power Flow. Such variables, when determined for power balance and upper limit of the switching variables equations, allow quantifying, respectively, the potential transfer of power between feeders and the tendency of closing the tie-switch to maximize the system load. It is thus possible to determine the best tie-switches among a variety of candidates through the proposed constructive heuristic algorithm. As a result, a more effective allocation of disconnect switches is acquired in order to improve the reliability of the system, which will be proven in the case studies of four systems in increasing order of number of bars, starting with the tutorial 14 bar system up to an real 476 bar system. At the end of this work, pertinent questions are raised and proposals for future work.