Electrotechnical Systems

155Simulation of Power Electronics Devices

=1

O1, 1

Cl

Block 1

Sum1

Sum2

Select

Sign

5

S2

S1

Sign(

I

a1

)

Comm

0

Cl

K

V

c

IX

IX

i

[B, IX]=

sort(u)

(a)

K0=1

+

+

+

–

O2, 1

Block 2

K

K

Block 3

K0=2

K0=3

O2, 2

O2, 3

O2, 4

O3, 1

O3, 3

O3, 4

O3, 2

O1, 2

O1, 3

O1, 4

=2

=3

=4

O1, 1

O2, 1

O3, 1

O4, 1

O1, 3

O2, 3

O3, 3

O4, 3

O1, 4

O2, 4

O3, 4

O4, 4

M1

M3

M4

M2

OR

OR

OR

(b)

OR

O1, 2

O2, 2

O3, 2

O4, 2

=1

PWM

Cl

K

=2

=3

=4

O4,

1

O4,

2

O4,

3

O4,

4

Select

AND

AND

AND

AND

IX(IX)

FIGURE 4.70 Control of the modular multilevel converter. (a) input circuits, (b) control

pulse generation.

156 Electrotechnical Systems

the outputO2,2; the logical 0 are at al ...