addition, excess power can
be sold the grid other consumers, such
as charging parks opening new business
opportunities for railway network operators.
6. MVDC railway power systems can also
directly integrate distributed renewable energy
sources such solar generation and battery
storage systems. Examples
include:
§ The use MVDC replace grid segments
in the United Kingdom.1
Battery Battery
3
3
3 3
ILC
3 3
LV 1kV
MV 6kV
Ship supply
transformer
Battery
Battery
Bow Thruster
No.
The advantages and drawbacks MVDC railway
power systems compared with MVAC are available
in [59].
The rest Section outlines existing MVDC
power system projects around the world. See the case study
below for detail the Flexible Power Link
project that aimed assist grid operations
by moving MVDC.
It offers advantages such simpler rolling stock
design, lower investment costs, higher reliability
and modularity, and easier integration with the AC
grid [59].
§ The work the Flexible Electrical Networks
(FEN) Research Campus RWTH Aachen
University Germany; started research
Figure 6-2 Example MVDC microgrid marine vessel application
ILC
LV 1kV
MVDC LVDDC scope
Shore connection
xxxx
Shore
Vessel
M
PS
SB
POD
G
3~
DG
Generator 2
G
3~
DG
Generator 1
SISHIP
SiPOD
G
3~
DG
Generator 3
G
3~
DG
Generator 4
SISHIP
SiPOD
POD
3 3
MV 6kV
3 3
3
3
Ship supply
transformer
Bow Thruster
No.2
MVDC SSCB
MVDC SSCB
LVDC SSCB
LVDC SSCB
.
§ The OPHELIA project France, using kV
MVDC network link together distributed PV
plant, detailed the case study above.5 Europe
MVDC projects Europe include commercial
MVDC deployments and research trials. Another project was
the Angle-DC project [60], deployed 2016-
2020, replace link with an
MVDC link; utilized the existing system’s
overhead lines and underground cables.53
MVDC projects around the world
system for long-distance, high-capacity railways
