contrast, Exebridge connects the Taunton
33 network, which predominantly demand-
led. The
back-to-back voltage source converters act as
a controllable interface between the two AC
networks, regulating power exchange and ensuring
stability under varying grid conditions. The FPL installed across
a normally open point (NOP) between the South
Molton and Exebridge 33/11 substations.
The FPL forms part Western Power Distribution’s
Network Equilibrium project.
.5. The project aimed
to improve voltage stability and optimize power
flows across the distribution system. This setup helps alleviate loading on
the 132/33 primary substations and enhances
voltage support along the extended radial circuits. The dynamic power
transfer control enables bidirectional energy
exchange, allowing for real-time balancing
between the two grid sections.
Figure 6-3 shows how the FPL integrated within
Western Power Distribution’s network in
Southwest England. Additionally, reactive power
management ensures smooth operation by
reducing voltage fluctuations critical factor for
integrating distributed generation scale.
The figure highlights how the FPL provides a
flexible and controllable connection between
networks with differing characteristics, supporting
power flow optimisation and system stability.
South Molton part the Barnstaple kV
network, which hosts high penetration of
distributed generation, particularly wind and solar
PV. Unlike
traditional reinforcement methods, the FPL
provides actively managed power link between
two previously unconnected networks,
utilizing MVDC back-to-back converter
station regulate power flows dynamically.
§ Research the Fraunhofer Institute for
Integrated Systems and Device Technology
on MVDC converters, examining applications
ranging from power marine systems [62].54
MVDC projects around the world
into conceptual frameworks and now a
major technology demonstrator covering
MVDC converter designs, grid control and
cyber-physical security issues.
§ Rated power transfer: (bidirectional
capability).
6. Voltage stabilization
is achieved through independent regulation at
both ends the link, substantially improving
local grid conditions.
§ Nominal voltage: each end. linking these two regions, the FPL enables
controlled export power from the energy
generation-rich Barnstaple area meet demand
in Taunton.
§ Converter type: Back-to-back voltage source
converters.
§ Short circuit contribution: additional
fault level increase, unlike traditional AC
reinforcements.1 Case study: Flexible Power Link,
England
The Flexible Power Link (FPL) project Western
Power Distribution southwest England an
advanced MVDC implementation designed to
enhance network flexibility, power flow control, and
distributed generation integration.
6.5.
The system configured follows:
§ Location: between Taunton and Barnstaple
Bulk Supply Points, Devon, UK.1 FPL’s MVDC control and protection
strategies
The FPL’s MVDC control system actively manages
power flows maintain system stability and
maximize network utilization.1.
§ link voltage: ±27 MVDC.
§ The Power Networks Demonstration Centre
(PNDC) research program the University of
Strathclyde Scotland; includes research on
MVDC circuit breakers, fault detection systems
and dynamic power routing [61].
§ Control functions: Active power transfer,
reactive power compensation, and voltage
stabilization
