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Multi-Level VSC (e.g. 4L-FC VSC)<br />

4-Level-FLC Converter<br />

V aM<br />

V<br />

aM<br />

=−<br />

1<br />

V<br />

2<br />

dc<br />

V dc /2<br />

V dc /6<br />

S 1<br />

S 2 S<br />

2<br />

3<br />

1<br />

a<br />

V dc<br />

M C 1 V C 2<br />

3 dc<br />

V<br />

3 dc<br />

S 6 S 5<br />

S 4<br />

-V dc /6<br />

-V dc /2<br />

S 1<br />

S 2<br />

S 3<br />

S 4<br />

S 5<br />

S 6<br />

V dc<br />

/2<br />

on<br />

on<br />

on<br />

off<br />

off<br />

off<br />

V dc<br />

/6<br />

on<br />

on<br />

off<br />

off<br />

off<br />

on<br />

-V dc<br />

/6<br />

on<br />

off<br />

off<br />

on<br />

on<br />

off<br />

-V dc<br />

/2<br />

off<br />

off<br />

off<br />

on<br />

on<br />

on<br />

Power Electronics Lab<br />

All rights reserved.Prof. Bernet 9/2003-21

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