© Manitoba HVDC Research Centre | a division of Manitoba Hydro International Ltd.
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MMC- Technologies
Presenters: Juan Carlos Garcia and Farid Mosallat
February 26 - 2015
Webinar:
© Manitoba HVDC Research Centre | a division of Manitoba Hydro International Ltd.
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1. Modular multi-level converters
2. dq decoupled vector current control
3. Half and H-bridge converters
4. Detailed equivalent models of MMC valves
5. Simulation of a two-terminal system
6. Simulation of a dc-fault and re-start process (half- and H-bridge
MMCs)
7. Setup of a three-terminal system (on-line demonstration – if time
allows)
8. Questions
Table of contents
© Manitoba HVDC Research Centre | a division of Manitoba Hydro International Ltd.
© Manitoba HVDC Research Centre | a division of Manitoba Hydro International Ltd.
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If you have questions during
the Webinar
© Manitoba HVDC Research Centre | a division of Manitoba Hydro International Ltd.
• Please e-mail PSCAD Support at
support@pscad.com
© Manitoba HVDC Research Centre | a division of Manitoba Hydro International Ltd.
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∠0
∠
Grid-connected VSC:
Operation principle
Neglecting R:
V
E
jX
L
I
I
V
E jX
L
I
I
Supplying P:
Absorbing P:
Supplying Q:
Absorbing Q:
I
V
E
jX
L
I
δ
V
E
jX
L
I
I
δ
sin
cos
∗
⇒
∠0∠
© Manitoba HVDC Research Centre | a division of Manitoba Hydro International Ltd.
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Phase Locked Loop (PLL)
© Manitoba HVDC Research Centre | a division of Manitoba Hydro International Ltd.
t
[
s
]
2.520 2.540 2.560 2.580 2.600 2.620 2.640 2.660 2.680 2.700
50
60
70
80
90
100
110
[Hz]
fsrc f (PLL)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
[rad]
Theta
-0.60
-0.50
-0.40
-0.30
-0.20
-0.10
0.00
0.10
[kV]
Vq
-1.00
-0.50
0.00
0.50
1.00
[kV]
Cos(Theta) Va
Extracting the phase angle of phase-A
voltage
