Abstract:
In this paper, a smart hybrid Fast Goertzel Algorithm
and RLS-Adaptive Filter based control scheme for harmonic
elimination, load balancing is presented. The control algorithm is
designed for shunt active power filter (SAPF) connected in parallel
with grid under distorted load conditions and non-linear load. The
function of the fast Goertzel algorithm is to extract the fundamental
frequency component with its magnitude and phase from the load
currents. This extracted fundamental frequency component is used
for estimating the reference currents based on the Recursive Least
Squares (RLS) adaptive filter approach. This hybrid FG-RLS (Fast
Goertzel-Recursive Least Square) control algorithm retains its
behaviour even under load unbalancing and sudden load shutdown.
Such improvement helps the adaptive filter for better convergence
rate with less computation burden. The performance of the proposed
FG-RLS scheme is simulated on three-phase applications to
demonstrate its capability for extracting the fundamental
component and further estimating reference currents.
