With the increasing demand for electrical energy, the design of electrical networks is becoming more and more complex to operate according to standards. The choice of devices for the installation of an electrical network would lead to many consequences such as loss of power, deterioration of the line due to overvoltages, etc. As a result, there are several methods of solving difficult problems, including metaheuristic methods. These methods, which appeared in the 1980s, are inspired by natural systems such as the particle swarm (PSO), the ant colony (ACO) and the genetic algorithm method (AG). The latter is a global research and optimization technique that is based on the mechanisms of natural selection and genetics, which can simultaneouly search for several possible solutions. In this work, it is a question of proposing a progam based on a metaheuristic method which will make it possible to optimally choose the elements of an electrical network. To do this, we first used the parameters of the Cameroonian North Interconnected Network (RIN) the proposed a program based on a genetic algorithm that we simulated with the characteristics of the latter using the MATLAB software in order to choose the best devices (conductors, insulators, pylons) for its implementation.

This work relates to a method of flow control for a unit of ultrafiltration membrane water powered by photovoltaic energy over the Sun in order to better master the sealing time and avoid damage to the filtration module. The complete system modeled and simulated on Matlab/Simulink includes a photovoltaic generator and a floor of adaptation converter-inverter, a single phase Electromagnetic induction motor coupled to a centrifugal pump, constituting the membrane ultrafiltration unit. The chopper booster switch IGBT is controlled by a MPPT controller - P & O that regularly adjusts the duty cycle taking its values in a range restricted to stabilize the voltage at the output of the chopper, and at the same time the flow of the pump.

Static converters are used in many different areas of the conversion of electrical energy. Significant developments in electric power switches and variety of design techniques of control and regulation circuits bring very advantageous solutions for congestion, reliability, performance and maintenance of converters. The present work focuses on the study and implementation of an Arc cosine pulse generator for commutated converter acting on a composite bridge in order to linearly control the speed of a DC motor. The principle of the control of the Arc cosine pulse generator for commutated converter is based on the fact the average rectified voltage is proportional to the control voltage as the rectified voltage is a function of the average cos?, which over a wide beach, is clearly non-linear. But for tension adjustment needs over a wide range, with a control voltage and constant ratio, it is often necessary to linearize the control. This allows a similarly linear variation in the speed of the DC motor.

Nowadays, it is known that every action made with the aim of contributing to reverse the global warming is appreciated according to its intrinsic value. Through the effect of economies of scale, together, the little actions made elsewhere are significant. If each person or every family in any area uses solar energy in all its domestic activities, the damage due to energy consumption in the world will be very low. This paper presents the command of an autonomous single phase converter with shifted command used to stabilize the energy produce by the photovoltaic cells in regard of the normal condition of usage. This shifted command aids in modifying the characteristics of the output voltage, particularly the effective value of its fundamental without involving the continue voltage of its energy supply. In multiple applications, it can be used in the energy supply of sensible devices like non synchronous machines. When this is jointed to a pump, it can produce drinking water by a tangential ultrafiltration unit of water with a perforated fiber. When it is combined to the command of the static converter of Mc Murray Bedford which is constituted of a monostich and a dephaser, commanded by the mutual inductance in order to obtain of a tension too close.