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Coordinated control of a battery energy storage and a Dump load in an autonomous Wind Power System

This paper presents the modelling and dynamic simulation of an Isolated Wind Power System (IWPS) consisting of a Wind Turbine Generator (WTG), a grid-forming Synchronous machine, a Battery Energy Storage System (BESS), a dump load (DL) and consumer load. First the IWPS components modelling is explained. Then IWPS frequency control requirements are analyzed and a PID regulator to govern the active power stored+dumped by the BESS+DL combination or supplied by the BESS along with a power-sharing algorithm between the BESS stored power and DL dumped power is presented. Finally, the IWPS is simulated in the cases of WTG power and consumer load variations. The simulation graphs show how the BESS or BESS+DL combination under the command of the PID + BESS-DL power-sharing algorithm perform a good regulation of the IWPS frequency. The results also show that the BESS improves the IWPS power quality and reliability when compared with only DL frequency control.