Harmonics mitigation and solutions - Schneider Electric
Harmonics mitigation and solutions - Schneider Electric
Harmonics mitigation and solutions - Schneider Electric
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1<br />
Over-sizing of sources,<br />
cables, etc.<br />
1<br />
II. <strong>Harmonics</strong> <strong>mitigation</strong> <strong>solutions</strong><br />
●Electromechanical <strong>solutions</strong><br />
●Active filters<br />
- The harmonics are not<br />
eliminated.<br />
- Very costly<br />
Transformers with<br />
different couplings<br />
2 Limits h3 <strong>and</strong> multiples.<br />
h3 h9<br />
D<br />
yn<br />
2<br />
D<br />
h5 h7<br />
Normal or replacement<br />
sources<br />
Tuned<br />
filters<br />
Anti-harm.<br />
reactors<br />
&<br />
series filters<br />
<strong>Schneider</strong> <strong>Electric</strong> 12<br />
D<br />
d y y<br />
3 4<br />
Y<br />
y<br />
p1 = p2 p1 = p2<br />
3 <strong>and</strong> 4 attenuate h5 <strong>and</strong><br />
h7 (6-pulse bridge)<br />
5<br />
6<br />
L<br />
F<br />
5 6<br />
Attenuates harmonics<br />
at the tuning frequency.<br />
Decreases THD(i).
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