The Adaptive Linear Element (ADALINE) as seen in [9]
- [12], when considered for harmonic detection can
determine harmonics in just half cycle of the fundamental
period. This algorithm serves good for harmonic tracking in
a real time environment due to its faster convergence rate. In
this paper, a Modified ADALINE algorithm with a TimeVariant
Widrow – Hoff rule has been proposed for harmonic
detection. This algorithm incorporates all the merits of
ADALINE together with a reduced error, to attain
maximum convergence. Thus detection reaches its
maximum value of exactness. A dc/ac inverter is used for
simulation to verify the effectiveness of the developed
algorithm. The effectiveness is investigated by simulation to
estimate harmonics by both ADALINE and Modified
ADALINE algorithms and the results are compared.