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Optimisation de L'écoulement de Puissance en Présence des Appareils des Systèmes de Transmission Flexibles en Courant Alternatif (FACTS) en Utilisant les Algorithmes Génétiques

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Titre :	Optimisation de L'écoulement de Puissance en Présence des Appareils des Systèmes de Transmission Flexibles en Courant Alternatif (FACTS) en Utilisant les Algorithmes Génétiques : Application sur le Réseau Electrique Algérien
Auteurs :	Belkacem Mahdad, Auteur ; Kamel Srairi, Directeur de thèse
Support:	Thése doctorat
Editeur :	Biskra [Algerie] : Université Mohamed Khider, 2003
Langues:	Français
Résumé :	During the last years, as power demand grow, the power system become increasingly more difficult to operate within the indices power quality, and the system become more insecure with unscheduled power flows and higher losses. In this context to overcome the technical difficulty related to power system security, a new concept has been introduced to power system operation and control called Flexible Alternative Current Transmission System (FACTS). The main objective of the different FACTS technology: Shunt Controllers (SVC), Series Controllers (TCSC), and the Hybrid Controllers (UPFC) are to bring a system under flexible control and to transmit power as ordered by the control centre. In other term this new technology allows to increase the power system security at severe critical conditions.This thesis proposes the application of an efficient hybrid algorithm based Parallel Genetic Algorithm and Fuzzy Logic Rules to solve the optimal power flow with consideration of dynamic controllers. Two techniques are then proposed to enhance the solution of the optimal power flow. The first technique is a Controlled Genetic Algorithm designed to adjust dynamically the GA parameters which are: the crossover and mutation probability. The second technique is a parallel GA based decomposed electrical network. At the decomposed stage the length of the original chromosome is reduced successively and adapted to the topology of the new electrical network partition. Two sub problems are proposed to coordinate the OPF problem under different loading conditions: the first sub problem related to the active power planning under different loading factor to minimize the total fuel cost, and the second sub problem is a reactive power planning designed based in practical rules to make fine corrections to the voltage deviation and reactive power violation using a specified number of shunt dynamic compensators named Static Var Compensators (SVC). To validate the flexibility and the robustness of the proposed approach, the proposed algorithm tested on many IEEE standard electrical network test (IEEE6- bus, IEEE 9-bus, IEEE 14-bus, IEEE 25-bus, IEEE 30-bus, IEEE 118-bus), and to the Algerian Sonelgaz 59-bus network test. The simulation results compared with conventional method (MATWORK Program, PSAT Package) and with global optimization methods (GA, FGA, DE, PSO, ACO, TS). The results show clearly that the proposed approach can converge to the near solution and obtain a competitive solution at critical situation and with a reasonable time.