ELECTROMECHANICAL SYSTEM WITH STORAGE OF WIND ENERGY IN HYDRAULIC ENERGY, IN THE DANUBE BOTTLENECK ("CUSURA DUNARII")

The present study analyses the operation mode, in the maximum power point-MPP, of wind turbine-WT, that operate at various wind speeds, located in the "Clisura Dunarii". The operation mode of the energy pumping storage system is analysed; in the hydraulic accumulation from "Portile de Fier I " hydroelectric power plant in time, at the point of maximum power. A maximum power point - MPP of energy storage is reached, with theflow of electricity in two directions, namely: in the network, or in the hydropower accumulation "Portile de Fier I", depending on the load curve in the national energy system and the potential eolian. In this way there is no problem of powerfluctuations that occurat wind speeds variable in time, fluctuations that disrupt the operation of the national powersystem (SEN), especially at wind speeds significantly variable overtime, as in the case of Romania. The system consists in a wind turbine, coupled with a synchronous generator with permanent magnets, (GSMP), which delivers electrical powerto an asynchronous motor, (MA), and coupled with a water pump, (PA). In the present paper, the behavior of the system is determined considering the mechanical angular speed/speed, rw (Wref), as a reference guantity in a driving system. Thus, an optimal management of the system is achieved, so as to extract the maximum wind energy, at wind speeds variable in time. The driving structure is based on measuring the momentary wind speed.