Fuzzy-Logic Based Frequency Controller for Wind Farms Augmented With Energy Storage and PV Systems

Document Type: Original Article

Authors

1 Department of Electrical Engineering, Tabriz Branch, Islamic Azad University, Tabriz,

2 Department of Electrical Engineering, Tabriz Branch, Islamic Azad University, Tabriz

3 Department of Electrical Engineering, Miyaneh Branch, Islamic Azad University, Miyaneh

4 Young Research and Elite club, Miyaneh Branch, Islamic Azad University, Miyaneh,

Abstract

To improve the primary frequency response in future low-inertia hybrid power system a fuzzy
logic based frequency controller (FFC) for wind farms augmented with energy storage systems
(wind-storage system) and intelligent PV farms for the frequency stabilization is proposed in
this paper. Using system frequency deviations the proposed controller provides bidirectional
real power injection and rate of change of frequency (RoCoF). Displacement of conventional
synchronous generators by non-inertial units such as wind or solar generators will result in
reduced-system inertia affecting under-frequency response. Frequency control is important to
avoid equipment damage, load shedding, and possible blackouts. To improve the frequency
response of low-inertia power system Wind generators along with energy storage systems can
be used. Moreover, FFC ensures optimal use of energy from wind farms and storage units by
eliminating the inflexible de-loading of wind energy and minimizing the required storage
capacity. The efficacy of the proposed FFC is verified by using the simulation results on the
low-inertia hybrid power system.

Keywords