Optimal operation of an wind power system with energy storage in electric accumulators

This work presents for a operating wind system at a time-variable wind speed, the way to compute the stored energy in the electric accumulators (EA). The mechanic energy that is captured through the wind turbine (WT) is converted into electric energy by a generator, for example, permanent magnet synchronous generator (PMSG). The synchronous generator provides energy, using a rectifier, in an electric accumulator (EA). Using classic mathematical models for the wind turbine, permanent magnet synchronous generator and the electric accumulator it has been proved be simulations that the WT + PMSG + EA system can operate in the optimal energy area regardless wind speed values if the generator's voltage level is properly chosen and the transformation ration (TR) corresponds to it. The electric system is self-regulating, adapting to the wind speed variation. By analyzing several cases, we were able to establish the basic values leading to optimum performance.