Integration of the Energy Storage System with a Wind Generation to Support Frequency in the Distribution Network
With the significant increase in the insertion of wind turbines in the electrical
system, the overall inertia of the system is reduced resulting in a loss of its ability
to support frequency. This is because it is common to use variable speed wind
turbines, based on the Double Fed Induction Generator (DFIG), which are coupled
to the power grid through electronic converters, which do not have the same
characteristics as synchronous generators. Thus, this thesis proposes the use of the
DFIG-associated Battery Energy Storage System (BESS) to support frequency. A
control strategy was developed, and important factors such as charging and
discharging current limitations and operation within BESS limits were considered.
Time domain simulations have been proposed to study a distribution system
containing a wind turbine (DFIG), showing the advantages of BESS over frequency
disturbances.