  Wind energy conversion system (WECS) is stochastic in nature and has low
inertia to grid voltage instability, poor reactive power compensation and most
importantly fault susceptibility. Variable speed WECS such as a doubly-fed
induction generators (DFIG) are well known to reach steady state quickly after
fault occurrence without the need for an external reactive power source because
of the presence of a back-to-back converter that provides independent control
of the active and reactive power unlike in the fixed-speed squirrel cage
induction generator (SCIG) counterpart that cant be stabilized unless ab
external source of reactive power support is present. However, controlling DFIG
is complicated and costly due to complete tripping unlike the fixed-speed
generators which doesnt trip completely when fault occurs. Hence, in this work,
a 48-pulse, 3-phase static synchronous compensator (STATCOM) is used to ensure
reactive power compensation and fault-ride through (FRT) control of the SCIG
against over-voltage emanating from fault occurrence in a grid-connected power
system. The goal here is to guarantee voltage stability and fault-ride through
control against injected faults within certain time ranges at the point of
common coupling (PCC) between the AC sources, the load, and the fixed-speed
WECS.
