This paper proposes two controllers for employing part of variable speed wind generation systems kinetic
energy in supporting the standalone MG frequency. The first controller acts similar to the frequency
droop control, while the second controller emulates both the inertia response and the frequency droop
control simultaneously. The MG frequency dropped only to 49.9 Hz with employing the proposed
controllers compared with 49.68 Hz without employing the proposed controllers. Also, the injected
active power from the storage device dropped from 20 kW to only 3 kW after employing the proposed
controllers. In addition, the reactive power capability of the Double Fed Induction Generator (DFIG) wind
generation system has been employed to maintain the standalone MG bus voltage at acceptable level. If
there are fixed speed wind generation systems in the standalone MG, this paper proposed using the pitch
angle controller to employ a suitable wind turbine power reserve in MG frequency supporting during the
standalone mode. Results proved the effectiveness of the proposed controllers in improvement the MG
overall performance during and subsequent the islanding occurrence.