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Converter Comparison - f c = 750 Hz<br />
(V ll,ν=1 = 2,3 kV, V dc =3400V, f c =750Hz, 2L-VSI: 6.5kV IGBTs, 3L-NPC / FC VSI:<br />
3.3kV IGBTs, 4L-FC VSC: 2.5kV IGBTs, S S = 38,61 MVA = const.)<br />
2L-VSC<br />
3L-NPC VSC<br />
3L-FLC VSC<br />
4L-FLC VSC<br />
Rated IGBT current I C,n<br />
990 A<br />
975 A<br />
975 A<br />
858 A<br />
Max. phase current I ph,max<br />
@ T j,max<br />
= 125° C, f c<br />
= 750 Hz<br />
600 A<br />
897 A<br />
871 A<br />
726 A<br />
Maximum apparent converter<br />
output power S C,max<br />
2.390 MVA<br />
3.573 MVA<br />
3.47 MVA<br />
2.892 MVA<br />
4<br />
output power [MVA]<br />
3<br />
2<br />
1<br />
0<br />
149,5% 145%<br />
121%<br />
100%<br />
2L-VSI 3L-NPC 3L-FLC 4L-FLC<br />
⇒ 3L–NPC VSC enables the<br />
highest converter output<br />
power<br />
Power Electronics Lab<br />
All rights reserved.Prof. Bernet 9/2003-23
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