Installation and Connection
3-16 | CFW-11M G2
3
3.2.1.6 Harmonics of the 18-Pulse Rectifier
and
show the typical values of the
harmonic content of the currents, Power Factor and THD (I) on the power supply, considering the 18-pulse rectifier.
Table 3.8:
Individual harmonics, Power Factor and THD (I) typical for rated load in the output, 18-pulse rectifier
Harmonic
Order
I (%)
FP
THD(I)
1
100.0 %
0.97
3.2 %
5
0.2 %
7
0.0 %
11
0.1 %
13
0.0 %
17
2.5 %
19
1.9 %
23
0.0 %
Nor
ma
liz
ed
Ha
rm
on
ic
A
mpl
itud
e
Load percentage
5th Harmonic
7th Harmonic
11th Harmonic
13th Harmonic
17th Harmonic
19th Harmonic
23th Harmonic
0 %
0,0 %
0,5 %
1,0 %
1,5 %
2,0 %
2,5 %
3,0 %
20 %
40 %
60 %
80 %
100 %
120 %
Note:
Amplitude of the normalized harmonics as a function of the fundamental with 100 % of load. 18-pulse rectifier.
Figure 3.20:
Typical values of the harmonics of the input current with variation of the output power
0.971
0.968
0.967
0.966
0.965
0 %
6.0 %
5.5 %
5.0 %
4.0 %
3.5 %
3.0 %
20 %
40 %
60 %
80 %
100 %
120 %
0.97
0.969
P
ow
er
F
act
or
THD
4.5 %
Load percentage
Figure 3.21:
Power Factor (FP) and THD (I) with variation of the output power 18-pulse rectifier