The lessons learned
from FPL will serve valuable reference for
future grid modernization initiatives and reinforce
the important role MVDC the transition a
decarbonized electricity system.9 cables. Further details are
available [63]. However,
these findings were recently re-evaluated, and
are presented Annex other early work,
KEPCO conducted experiments determine
the maximum MVDC voltage applicable to
existing MVAC cables and conductors and
confirmed that could applied to
22. KEPCO’s initial
analysis showed that MVDC was economically
viable only very limited cases.
6.5.
Examples include:
§ MVDC investigative work initiated 2017 by
Korea Electric Power Corporation (KEPCO),
the country’s sole power utility.
Continuous insulation monitoring place to
detect early-stage insulation degradation, thereby
preventing major failures. The
modular converter design allows selective isolation
of faulted sections without compromising the entire
system, enhancing fault tolerance.55
MVDC projects around the world
The FPL system achieves overcurrent
protection through fast-acting circuit breakers
that isolate faults and minimize network downtime. Metal-oxide surge
arresters (MOSAs) provide transient overvoltage
protection safeguard the system against
switching transients and lightning strikes. This latter capability
ensures more reliable power supply, reducing the
risk blackouts and system failures. MVDC transmission also reduces
overall energy losses, resulting operational cost
savings. The project findings indicate that MVDC-
based solutions offer cost-effective approach to
managing power constraints while future-proofing
the distribution network against rising demand. Recognizing
MVDC technology core element future
distribution networks, KEPCO launched a
project assess feasibility. The
bidirectional nature the MVDC link enhanced
grid resilience, allowing dynamic power re-routing
in the event outages.
§ The Korean government sees MVDC
technology key component future
Figure 6-3 Single line diagram showing
integration the Flexible Power Link
. efficiently balancing distributed
generation across networks, the FPL helps ensure
optimal utilization power generated wind
and solar farms.
Another advantage the FPL system was its ability
to improve the hosting capacity for renewable
energy sources.
6.1.
Following the success the trial phase, Western
Power Distribution now exploring wider
deployment MVDC links constrained areas of
the UK’s distribution network.2 FPL’s operational benefits and
economic impact
The implementation the FPL system helped
defer infrastructure investment reducing the
need for costly grid reinforcements such as
additional substations and transformers.6 South Korea
South Korea has several noteworthy MVDC
research, testing and demonstration projects
