Environmental Engineering Reference
In-Depth Information
current controller is designed according to the
H
∞
control theory and the weighting function
is chosen so that the harmonic components flowing through the capacitors are eliminated.
Intensive experimental results have shown that, for an increased neutral current
i
N
, the parallel
voltage-
H
∞
current controller is effective and is able to maintain a stable neutral point even
when the neutral current contains significant harmonic components. The improvement of
performance due to the individual treatment of harmonics is clearly demonstrated.
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