Souhir Tounsi
Network, wind energy, injected energy, optimal control, AC–DC conversion, DC–AC conversion
This paper concerns the control of a wind energy conversion chain injecting a portion of energy into an electrical network. In fact, the kinetic energy captured by the air is converted by means of a geared speed multiplier, a three-phase synchronous generator with permanent magnets, an AC–DC converter, and a DC–AC converter. An AC–DC converter is used to convert the three voltages developed by the electric generator into a direct voltage, in this case, a first phase of optimal energy recovery at batteries, aims to regulate the direct voltage to its optimal value for being converted into three- phase alternating voltages injectable into the network, takes place. The amplitude of the voltages injected into the network is regulated to a value allowing maximum energy extraction. To protect the energy conversion chain against over-currents, three resistors connect the three-phase voltages to the network. The voltages injected into the network are maintained in phase with the network voltages to maintain the power factor at unity. The global model of the conversion chain is validated following its implementation in the MATLAB–Simulink simulation environment.
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