Fifth, renewable
energy is environmentally
friendly being mostly carbon neutral. This
reduces indoor
and urban pollution as well as emission of greenhouse gases that
cause
global
warming.
1.1
Vision
The Federal
Government of Nigeria’s vision of renewable energy in the power sector
is
the achievement
of accelerated sustainable development through increased share of
renewable
electric power to the national electricity
supply.
1.2 Electricity situation in Nigeria
Nigeria is endowed with
sufficient energy
resources to meet its present and future
development
requirements. The country possesses the world’s sixth largest reserve
of
crude oil. It is
increasingly an important gas province with proven reserves of nearly
5000
billion cubic
meters. Coal and lignite reserves are estimated to be 2.7billion tons,
while
tar sand
reserves represent 31 billion barrels of oil equivalent. Identified
hydroelectricity
sites have an
estimated capacity of about 14,250MW. Nigeria has significant
biomass
resources to
meet both traditional and modern energy uses, including electricity
generation. The
country is exposed to a high solar radiation level with an annual
average
of 3.5 –
7.0kWh/m2/day. Wind resources in Nigeria are however poor -
moderate, and
efforts are yet
to be made to test their commercial competitiveness.
The current
installed capacity of grid electricity is about 6000MW,
of which about 67
percent is
thermal and the balance is hydro-based. Between 1990 and 1999, there was
no
new power plant
built and the same period witnessed substantial government under-
funding of the
utility for both capital projects and routine maintenance
operations.
Generating plant
availability is low and the demand – supply gap is crippling. Poor
services have
forced most industrial customers to install their own power generators,
at
high costs to
themselves and the Nigerian economy.
By 2005, the
transmission network consisted of 5000km of 330 kV lines, and 6000km
of
132 kV lines.
The 330 kV lines fed 23 substations of 330/132 kV rating with a
combined
capacity of
6,000 MVA or 4,600 MVA at a utilization factor of 80%. In turn, the 132
kV
lines fed 91
substations of 132/33 kV rating with a combined capacity of 7,800 MVA
or
5,800 MVA at a
utilization factor of 75%.
The distribution
grid consisted of 23,753 km of 33 kV lines and 19,226 Km of 11 kV
lines. In turn,
these fed 679 substations of 33/11kV rating and 20,543 substations
of
33/0.415 and
11/0.415 kV ratings. In addition, there were 1,790 distribution
transformers
and 680
injection transformers.
The transmission
network is overloaded with a wheeling capacity less than 4,000 MW.
It
has a poor
voltage profile in most parts of the network, especially in the
North,
inadequate
dispatch and control infrastructure, radial and fragile grid network,
frequent
system collapse,
exceedingly high transmission losses.
PHCN’s business
operations are inefficient. The system suffers from chronic under-
investment, poor
maintenance, un-recorded connections and under- billing arising from
a
4