Harmonics mitigation and solutions - Schneider Electric
Harmonics mitigation and solutions - Schneider Electric
Harmonics mitigation and solutions - Schneider Electric
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II. The effects of harmonics<br />
●Increase in the apparent power <strong>and</strong> over-sizing of<br />
sources<br />
> Linear load without harmonics:<br />
• Cos phi = Power factor = P/S<br />
φ<br />
ST (VA)<br />
P (W)<br />
> Non-linear load :<br />
S (VA)<br />
• DPF = Displacement Power Factor - P 1 /S 1 ( 50 Hz<br />
fundamental current only)<br />
• True Power factor = P/ST<br />
Q (var)<br />
D harmonic<br />
P 2 + Q 2<br />
> S = apparent power<br />
<strong>Schneider</strong> <strong>Electric</strong> 10<br />
S =<br />
S =<br />
P 2 + Q 2 + D 2
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