Short and Medium Term Energy Solution
Bulk Power Generation Station
- CONCEPT OVERVIEW
Liberia emerges from the destruction of
the civil crisis, a fully integrated Bulk
Power Generation system that will provide
efficient power systems supply must be
deployed to meet the energy needs of the
new emerging economy in Monrovia and the
new Bulk Power System will allow the "New
Monrovia" to emerge and be built
by local and foreign investors in three
areas covering the main access roads into
the capital, Monrovia-Shefflin Highway,
Monrovia-Virginia Highway and Monrovia-Mount
Barkley Highway. Considering Monrovia's
"geography" and "topography"
a "35KV 40MW High Voltage Transmission
RING System" can be built in a period
of 8 -12 months using cement poles to
insure the flow of power "Around"
35KV Transmission system will effectively
have three nodes points that will move
electricity along these major highways
thus providing direct access into the
interior parts of Liberia (East, West
and North). This expansion will allow
major growth in the Liberian economy leading
to major job creation in these areas.
power generation market has many companies
such as Aggreko, Cummins Power Generation,
Kohler Power Systems and others that focus
on this business model across the global
market place. This is NOT a new concept
and based on previous as well as working
models of the Bulk Power Generation Power
Station, one can be constructed in relatively
short time (2 - 3 months) in Liberia.
The power generation units are NOT purchased,
rather they are provided as part of the
"Power Purhase Agreement - PPA"
with the Government of Liberia for the
duration of the agreement.
Power Station's generation units will
be 440VAC/50Hz or 60Hz and packaged transformer
units (440 to 35KV/ 5 -10MVA) shall be
installed to "step up" the generation
voltage to 35KV to connect on the HV T&
D network. With the establishment of a
"Power Purchase Agreement - PPA"
between the Liberia's National Power Company
(LEC) and the Independent Power Generation
Company, agreements can be established
for the GOL to provide the "diesel
fuel" for generation and power can
be provided to the T&D network for
a very low rate.
KEY to making this solution work is effective
deployment or construction of the Power
Station at the "Bulk Fuel Storage
Site" and this means, basing the
power system at the LPRC facility on the
Gardnersville Highway. Based on this solution,
once the "35KV 40MW High Voltage
Transmission Ring System" has been
established around the city, the "Three
Critical Nodes" can provide power
to the rest of the surrounding cities
leading into the three critical areas
of the country:
ELWA Junction - Single Line/Circuit Distribution
Line (35KV) along the Shefflin Highway
to Marshall, RIA, and lower Margibi as
well as other areas.
2) Free Port Junction - Single Line/Circuit
Distribution Line (35KV) along the Duala
Road to Caldwell Junction and up to Lott
Carey and towards Bomi Hills area
3) Red Light Junction - Single Line/Circuit
Distribution Line (35KV) along the Mount
Barkley Highway to Careysburg, 15 Gate
and to Kakata areas
Bulk Power Generation Station can be initiated
with as little as 5MW and as demand is
increased on the 35KV Transmission Ring
and into the Three Critical Nodes, additional
1MW units can be added. Based on the PPA,
the Independent Power Generation company
shall be responsible for the complete
operation of the Bulk Power Generation
Station as well as all related maintenance
and servicing of the power generation
units installed at the Station.
POWER STATION CONSTRUCTION & NETWORK
Stage/Deploy the power generating units
at LPRC area for the since the "Bulk
Fuel Supply" is at the LPRC facility.
This will eliminate the need to transport
fuel by trucks, reduce theft and will
improve operating effectiveness and productivity
while reducing generation costs.
Construct a concrete "pad" of
the required size (100 feet x 100 feet
or larger) to provide a secure "pad
mount" for the power generation units
and transformer units.
Proper warehousing of spares and consumable
hardware will be provided using 40 foot
containers at the site.
The "Bulk Power Station Site"
will be properly fenced to prevent vandalism
from outsiders and proper lighting for
the area will be provided for security.
Proper "fuel piping" shall be
installed to provide effective fuel metering
to each of the generating units from the
Bulk Fuel Storage" tank or tanks
at LPRC. This will allow proper accounting
of "Fuel Consumption vs Generated
Kilowatt" from the station.
The Power Generation Units will provide
- Automatic Synchronization to add additional
- Automatic Load Controllers / Real Time
- LV Circuit Breaker to connect to "Common
LV Bus System"
The required number of LV/HV Transformer
Banks Units (5 - 10MVA) shall be deployed
to "Step Up" the generating
voltage of 440VAC to 35KV.
As load in the "35KV Power Loop"
increases over time (5MW to 10MW and above)
more generating units can be added to
meet "Load" demand.
40MW at 35KV POWER LOOP DESIGN
that Monrovia is a "BIG LOOP"
this presents a very simple power network
design for the "short term"
power needs as well as a basis for our
long term energy needs. To meet the short
term and moderate term needs for power,
a 40MW at 35KV "Power Loop"
should be built around the city and power
"injected" into the "Power
Loop" from the LPRC Bulk Power Station.
The 35KV transmission line should "originate"
from the LPRC Bulk Power Station and terminate
at the "Gardnersville Highway".
35KV Fused Cut Outs and "3 Gang 35KV
Fused Switches" will be installed
on the required number of cement poles
to provide "manual switching"
and "sectioning" into the following
Red Light (2 x 35KV Splits)
Omega Tower Area towards Careysburg
ii. ELWA Junction (2 x 35KV Splits)
1. Shefflin to RIA and Marshall
Congotown to Tubman Blvd
Freeport Junction (2 x 35KV Splits)
Central Town towards Viatown and Claratown
ii. Duala and towards Clay and Virginia
Across the "Swamp" from Gardnersville/LPRC
Junction and connect to:
Old Road Area and then to Tubman Blvd
Over Current Protection: Eeah "35
KV Split" on the 35KV Power Loop
will be protected by 3 HV Fused Cut Outs
with the proper current rating at 35KV.
This will provide a cost effective solution
for power distribution, over current protection
and T&D maintenance in the future.
Power distribution at the "Point
of Utilization" shall be provided
by a "Medium Voltage - MV" network
rated at 11KV. This network will originate
at the 35KV lines to feed the 5 - 10 MVA
34KV/11KV transformers that will be deployed
in strategic areas in and around the city.
11KV/440VAC "Packaged Substations"
shall be deployed in neighborhoods to
feed the "Utilization Voltage"
to the various blocks of Loads. The Packaged
Substation will be comprised of the following:
- 1 x Oil Filled Transformer (250KVA,
- 1 x Fused Feeder Pillar (4 Ways - 250
- Cement Pad Mount with Fencing
- 3 x 35KV Fused Cut Out (Primary Protection
At each area's "Point of Utilization",
one Packaged Substation will be installed
for low voltage distribution for customers:
New Georgia Estate
- Steven Tolbert Estate
- Barnesville Estate
- Iron Factory
- Old Road Area
- ELWA Junction
- Police Academy Area
- Red Light
Utility poles to be deployed for this
project will be constructed from "Cement"
to allow for the following:
Massive Job Creation (Local labor and
- Lower Cost Labor
- Durability of infrastructure (poles)
- Long term project to make needed poles
for network expansion into the Three
Critical Nodes of the power network
Prepayment Meters shall be installed for
residential customers and commercial customers
to insure "revenue collection".
This will allow for "Pre-financed
Power" to be provided to the economy
§ With the "prepaid business
concept" already driving the Telecom
sector, the very same product distribution
network can be used to provide effective
distribution of Prepaid Energy Cards to
With current funding for the EPP from
the USAID, World Bank and the EU, focus
can be put on the building of a low cost
40 - 50MW @ 35KV Power Loop around the
city using cement poles. Effective implementation
of this project can yield results within
4 - 6 months of initiation. This will
put Liberia on track for "sustainable
development" and attract foreign
investors who not see the "supply
of power" as a major challenge to
making their investments realized.
power system will also stimulate the construction
sector for various contractors such as
plumbing, electrical, construction and
all other building trades. Most importantly,
existing Liberian businesses that will
get connected to the power system grid,
will be able to increase their profits
and reduce their costs of operating due
to the reduction in generator maintenance,
fuel purchase and other related expenses
related to the use of localized generators.
This will lead these companies to increase
employment for the local economy and increase
the government's tax base.
PLC, (www.aggreko.com) is the world leader
in the provision of temporary power for
typical application like Liberia. A "Power
Purchase Agreement - PPA" arrangement
with Aggreko will allow Liberia to accelerate
its economic growth and expansion in the
relative short term.
Power Station supply various capacities
at different voltages ranging from 8 MW/11kV
at Aniyakanda to 45 MW/33KV at Kosgma
and operated a 10 MW/69kV "baseload"
power plant at the Panit-an substation
in the Capiz Province of Panay Island.
A complete package was supplied including
generators, transformers, fuel tanks,
and high voltage cabling. All equipment
and ancillaries were mobilized, installed
and commissioned less than 40 days after
electrification was also an issue, and
when Cabinda Town had established a reliable
electricity source the demand in outlying
areas also increased. To meet this demand,
Aggreko installed eight 'satellite power
stations' of 2MW power packages in remote
areas, from the rain forests in Northern
Cabinda to the area's surrounding the
and operated a 9MW / 6.6kV temporary power
plant, which was synchronized with the
cement plants' existing medium speed heavy
fuel oil power unit.
Prepared and presented by:
Alkina Fayah Phillips - Power Systems
& Telecoms Engineer