Master's Dissertation
DOI
https://doi.org/10.11606/D.18.2009.tde-27052009-142518
Document
Author
Full name
Aldir Silva Sousa
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2009
Supervisor
Committee
Lázaro, Ruben Augusto Romero
Title in Portuguese
Tomada de decisão Fuzzy e busca Tabu aplicadas ao planejamento da expansão de sistemas de transmissão
Keywords in Portuguese
Algoritmo heurístico construtivo
Busca Tabu
Metaheurística
Planejamento da expansão da transmissão
Abstract in Portuguese
Title in English
Fuzzy decision making and Tabu search applied to planning the expansion of transmission systems
Keywords in English
Constructive heuristic algorithm
Fuzzy decision making
Heuristic
Metaheuristic
Tabu search
Transmission expansion planning
Abstract in English
A new solution technique to solve the long-term static transmission expansion planning (TEP) problem based on fuzzy decision making is proposed. The technique applies the concepts of fuzzy decision making in a constructive heuristic algorithm. The fuzzy system is used to circumvent some critical problems of heuristics that use sentivity indices as a guide for insertion and construction of new lines. The heuristic algorithm proposed in this work is based on the divide and conquer technique. It has been verified that the deficiency of the constructive heuristics is due to the decision of inserting new lines based only on information given by the index, which usually is calculated from a relaxed mathematical representation of the problem and can become less accurate during the solution process. In order to be able to deal with such problem, whenever the quality of the index decreases, the original problem is divided into two sub-problems: one examines the quality of the solution when the transmission line indicated by the sensitivity index is inserted and the other subproblem checks the opposite. Fuzzy decision-making is used to decide the moment to divide the problem into two subproblems based on other information. The hybrid linear model is used to model the long-term transmission expansion planning problem and is used in the proposed algorithm. Tests was done with systems of small-term, medium-term and long-term. The optimal solution of small-term and medium-term was foundo using just the construtive heuristic algorithm with fuzzy decision-making. To deal with long-term systems was used the solutions of the construtive heuristic algorithm with fuzzy decision-making to init a tabu search. The tabu search uses the dc model. The results are very promising. The test was done with some real brazilian systems and with the real colombian system.