NAME:
Professor C.O.A. Awosope
COLLEGE:
Engineering
SCHOOL:
Applied Engineering
DEPARTMENT:
Electrical & Information Engineering
PROGRAMME:
Electrical & Electronics Engineering
CV UPDATED:
December 3rd, 2014
ABSTRACTS OF PUBLICATION
S/N
1
TITLE OF ARTICLE
ABSTRACT
Wind Energy Potential
in Nigeria
Wind energy is one of the fastest growing
COA. Awosope
technologies in energy generation industry nowadays. et al.
The erratic and epileptic state of power in this
country and the concern about global warming should
be a great concern for all and should drive us into
strong demand for wind generation. The main
advantages of electricity generation from wind are
the absence of harmful emissions, very clean and the
almost infinite availability of the wind that is
converted into electricity. In Nigeria, where the wind
power prospect is estimated to be high or moderate
has not connected this renewable resources to the
grid. It is not just enough to say that the wind turbines
should be connected to the grid because there are
sufficient wind speeds to drive the wind turbine.
Mostly, the stability and reliability studies must be
carried out whenever wind power is to be connected
to power system to predict severe consequences on
the power system to which the wind generators will
be connected.
AUTHOR (S)
Page 1 of 12
OUTLET
International Electrical
Engineering Journal
(IEE) Vol. 3 (2012) No 1,
PP595-601. ISSN 20782365
This paper therefore describes the wind energy
potential in Nigeria and specifies the conditions to be
met before the wind generator can be connected to
the existing grid and how it can be connected. The
paper also shows that short-circuit power at Point of
Common Coupling (PCC) is the crucial value for the
permissible installed power ratings of the turbine.
2
Wind Power Potential
and Integration in Africa
Wind energy penetration into power networks is
increasing very rapidly all over the world. The great
concern about global warming and continued
apprehensions about nuclear power around the world
should drive most countries in Africa into strong
demand for wind generation because of its
advantages which include the absence of harmful
emissions, very clean and almost infinite availability
of wind that is converted into electricity. This paper
shows the power available in the wind. It also gives an
overview of the wind power potential and integration
in some selected Africa countries like Egypt, Morocco,
South Africa and Nigeria and thechallenges of wind
power integration in Africa continent are also
discussed. The Northern part of Africa is known to be
Africa’s Wind pioneers having installed and
connected the Wind Energy Converters (WEC) to the
Page 2 of 12
COA. Awosope
et al.
International Journal of
Development and
Sustainability. ISSN:
2186. 8662. May 2013
grid. About 97% of the continent’s total wind
installations are located in Egypt, Morocco and
Tunisia.Research work should commence on the
identified sites with high wind speeds in those
selected Africa countries, so that those potential sites
can be connected to the grid. This is becausethe
ability of a site to sufficiently accommodate wind
generation not only depends on wind speeds but on
its ability to interconnect to the existing grid. If these
wind energy potentials are tapped and connected to
the grid, the erratic and epileptic power supply facing
most countries in Africa will be reduced; thereby
reducing rural-urban migration and morejobs will be
created.
3
Technical Challenges in
connecting Wind Energy
Converter to the grid.
Most developing nations of the world are looking COA. Awosope
towards renewable energy sources as a sustainable et al.
option. Among all the energy sources, the one that is
matured to the level of connecting it to the grid (either
distribution or transmission) is wind energy. As wind
energy is increasingly integrated into power systems in
some countries in the world, the stability of already
existing power systems is becoming a concern and of
utmost importance to the power system engineers and
operators. This is because the connection of wind
generators to the existing grid poses new challenges
Page 3 of 12
International journal of
renewable and sustainable
energy Vol. 2, No 3, pp 9092 May 20, 2013
which have a significant impact on the system and
equipment operations in terms of steady state, dynamic
operation, reliability, power quality, stability and safety
for both the utility and customers. These challenges are
due to the fluctuating nature of the wind and the type of
wind generator used. In order to supply quality voltage,
SVC and STATCOM can be used to control the reactive
power at the point of common coupling. Also the use of
variable speed wind turbine generator can help in
lowering the flicker level. This paper therefore gives the
overview of the causes of these challenges, its effect on
the existing power system and possible ways of
improving the challenges.
4
Capacity Integration
into a microgrid, a Tool
for Electrical Energy
Supply Cost Reduction
in Nigeria
The cost implication of running a cluster of standCOA. Awosope
alone power generating plants was investigated using et al.
the generating capacities of the generators and
consumption (load) profile obtained from a campus
based substation. Analysis of the results revealed a lot
of unused available capacity within the system which
invariably increases the operating cost of power
generation within the campus. Integrating the power
generators into a microgrid was suggested where
there will be a common pool of energy sources and all
loads attached to the network. The proposed network
model seeks to reduce power plant engagement by
integrating the generating power plants into a
microgrid system. To overcome the challenge of
synchronization in the AC platform as the power
generators are dissimilar, the network is designed to
operate as a DC microgrid where the AC generating
plants and loads will be interfaced by converters
(rectifiers) and inverters respectively. This method
reduced the unused capacity being wasted by
Page 4 of 12
Accepted paper for
World Congress on
Engineering 2014
(WCE 2014). Date 2-4
July, 2014 - paper
number: ICEEE_82
5
6
A Review of PHCN
Protection Schemes
Innovative PracticalOriented Teaching
Reforms in Engineering
Education: A Key To
Effective Capacity
Building
reducing power plant engagement and consequently
reducing the running cost of power generation in the
campus
This paper brings to the fore, a comprehensive and
COA. Awosope
useful guide to the concepts, practices, and equipment et al.
in the important field of Electrical (protection)
Engineering. The PHCN Power network experiences
several types of fault like over/under voltage,
overload, earth fault etc. and as a result of these
faults, proper protection is necessary for efficiency
and continuity of supply. Components of protection
and the various protection schemes as well as their
guiding principles as it relates to old method of
protection employed by PHCN and the latest
improvements are also considered. This paper also
sheds light on the protection of PHCN networks from
generation, transmission and distribution, also
considered is the protection of transformers, busbars,
transmission lines, overhead lines, generating
generators and feeders. It is anticipated that this
work will be of immense benefit to those concerned
with design, planning, construction and operation
especially in the area of protection.
Thorough engineering education imparts robust and COA. Awosope
reliable knowledge and practical skills in relevant et al.
fundamental as well as advanced concepts for the purpose of
applying scientific information, data and results to analyze,
design, synthesize and develop useful systems, devices and
machines. Unfortunately, many engineering schools in our
universities over the years have adopted incomplete and or
weak teaching methods that give superficial and alarmingly
low attention to students’ exposure to well-developed
practical skills, thereby reducing the quality of technical
Page 5 of 12
International Journal of
Engineering Research &
Technology (IJERT)
Vol. 2 Issue 11,
November – 2013. ISSN:
2278 - 0181
Proceedings of the 5th
African Regional
Conference on
Engineering Education
(ARCEE 2013); 9 – 12
Sept. 2013. pps 242 251
know-how of the young engineering graduates.
This paper presents an analysis of the teaching methodology
being adopted by many engineering schools in Nigerian
universities. This is done in comparison with recognised
working models, which are employed by universities in
developed countries. The paper also presents an innovative
practical teaching reform for the enhancement of effective
students’ capacity development.
7
A Markov model for
estimating the remaining
life of electrical insulation
in distribution
transformer
8
A probabilistic modeling
of distribution
equipment
Deterioration; An
application to
transformer insulation
In this paper, a Markov maintenance model for
predicting the remaining life of transformer
insulation has been developed. It incorporates
various stages of insulation deterioration and minor
maintenance state. Given that a current state of
insulation ageing has been reached, from a diagnostic
testing and inspection, this model is capable of
computing the predicted average time before
insulation failure occurs. The algorithm developed in
this model was implemented in a computer program
using Matlab. The data required for this program and
the numerical example based on the developed
algorithm are also discussed
In this paper, a probabilistic maintenance model
relating probability of failure to maintenance activity
had been developed for maintainable distribution
components. This model incorporates various levels
of insulation deterioration and minor maintenance
state.
It was applied to a distribution transformers ranging
from 300 KVA to 15 MVA in Abule-Egba Business Unit
network of Power Holding Company of Nigeria. The
result obtained from the application study and model
simulation verified the mathematical analysis of the
developed model. Although this application illustrates
Page 6 of 12
COA. Awosope
et al.
Research, Am. J. Sci. Ind.
Res., (3) (2010)
COA. Awosope
et al.
International Journal
of Engineering &
Technology (IJET).
Vols 10, Issue 04,
ISSN: 2077-1185.
2010.Pakistan at
http://www.ijens.org
the development of a probabilistic deterioration
model for a distribution transformer, these models
can be developed to predict the performance of other
distribution components in the Electric power system
network.
9
Modeling Distribution
Component
Deterioration: An
application to
Transformer Insulation.
The two most critical components in a typical Power
System are the circuit breakers and transformers.
Failure of any of these components will result in high
cost due to component replacement and associated
load loss. Reliability Centred Maintenance (RCM) may
reduce this cost in the long run by extending the
component lifetime and increasing availability. This
will be possible, since the adopted RCM will balance
carrying out too much maintenance which will
increase maintenance cost or too little maintenance
that will result in catastrophic failure and hence
increases the cost of maintenance and repair. A
Markov model that relates probability of failure to
maintenance activity is developed for distribution
transformers. This model incorporates various levels
of insulation deterioration and minor maintenance
state. It was applied to one of the distribution
transformers in Abule-Egba Business unit network of
Power Holding Company of Nigeria. The result
obtained from model simulation agrees with the one
obtained from the mathematical analysis of the
developed model. With an adjustment in the
inspection parameter, this probabilistic deterioration
model for a distribution transformer can also be
applied to predict the performance of circuit
breakers.
COA. Awosope
et al.
Advanced Materials
Research Vol. 367(2012)
pp 117-123© (2012)
Trans Tech Publications
Switzerland Doi:
10.4028/www.scientific.
net/amr.367.117
10
Critical review of the
The purpose of maintenance is to extend equipment
lifetime or at least the mean time to the next failure.
Page 7 of 12
COA. Awosope
International Journal of
11
reliability centred
maintenance (RCM) for
Asset management in
Electric power
distribution system.
Maintenance too incurs expenditures that result in very
costly consequences when not performed or performed
too little, and it may not even be economical to perform it
too frequently. Therefore the two costs must be balanced.
In the past, this balance has been estimated by
extrapolating the experience obtained from existing
systems and using the rule - of – thumb methods.
Nowadays, the tempo of advanced and softiscated research
in that direction has rendered such rule – of – thumb
methods obsolete. The literature describing the reliability
centered maintenance methods for managing distribution
assets has grown until the papers can now be numbered in
thousands. This paper presents critical review of the
various existing methods that have been developed by
different researchers and proposed a probabilistic model
that will provide a quantitative connection between
reliability and maintenance, a link missing in the heuristic
approaches.
et al.
Engineering and
Technology Volume 2
No. 6, June, 2012
Asset Maintenance
Planning in Electric
Power Distribution
network using Statistical
Analysis of Outage data.
The problem faced by electric power utilities in developing
countries today is that the power demand is increasing
rapidly whereas the supply growth is constrained by aging
generating and distributing assets, scarce resources for
constructing new ones and other societal issues. This has
resulted in the need for constructing additional new
generating plants and a more economic way of planning
and maintaining existing Generating and Electric power
distribution assets. System planning and maintenance that
are based on reliability – centred asset management
approach had been adopted.
Maintenance of critical asset is an essential part of asset
management in distribution network. In most Electric
utilities, planning for maintenance constitutes an essential
parts of asset management. In this paper, an enhanced
RCM methodology that is based on a quantitative
Page 8 of 12
COA. Awosope
et al.
Elsevier International
Journal of Electrical
Power and Energy
Systems (IJEPES),
Volume 47, May 2013,
pages 424-435,
relationship between preventive maintenance (PM)
performed at system component level and overall system
reliability was applied for the identification of distribution
components critical to system reliability. The conclusion
from this study shows that it is beneficial to base asset
maintenance management decisions on processed,
analysed and tested outage data.
12
Power Flow Analysis of
Abule-Egba 33-kV
Distribution Grid System
with real network
Simulations.
This paper is concerned with using the fault
COA. Awosope
analysis to establish the requirements for the proper
et al.
selection of circuit breaker; A Case Study of Power
Holding company of Nigeria (PHCN) 330-kV
Transmission Grid System. The work is
modelled for Fault Analysis and it is written in a
flexible MATLAB programs to accommodate addition
or reduction in the Transmission Grid System. It
aimed at establishing the Circuit Breaker Capacity at
any point in the system. The result is then compared
with the existing circuit breaker capacity of PHCN
330-kV system. The short-circuit fault is simulated by
combining a solution of algebraic equations
describing the changes in the network with a
numerical solution of the differential equations. Two
MATLAB programs were written and simulated; one
for Lord Flow study to know the pre-fault bus
voltages based on Gauss-Seidel Method; the other for
Short Circuit Studies which made use of Thevenin’s
theorem application. The highest Circuit Breaker
Capacity established by the result of this study is
relatively lower and the investments needed for this
are smaller compared with the normal practice with
PHCN system. This reveals that PHCN system can be
protected with this low capacity circuit breaker with a
reduced cost effectiveness and equal sensitivity which
is a break-through in terms of Circuit Breaker
Page 9 of 12
IOSR Journal of Electrical
and Electronics
Engineering (IOSR-JEEE)
e-ISSN: 2278-1676,pISSN: 2320-3331,
Volume 9, Issue 2 Ver. III
(Mar – Apr. 2014), PP
67-80
Capacity in the field of power system protection.
13
Reliability Analysis of
Circuit Breaker in the
Nigerian 330-kV
Transmission Network.
This paper is concerned with using the fault analysis
COA. Awosope
to establish the requirements for the proper selection et al.
of circuit breaker; A Case Study of Power Holding
company of Nigeria (PHCN) 330-kV Transmission
Grid System. The work is modelled for Fault Analysis
and it is written in a flexible MATLAB programs to
accommodate addition or reduction in the
Transmission Grid System. It aimed at establishing
the Circuit Breaker Capacity at any point in the
system. The result is then compared with the existing
circuit breaker capacity of PHCN 330-kV system. The
short-circuit fault is simulated by combining a
solution of algebraic equations describing the changes
in the network with a numerical solution of the
differential equations. Two MATLAB programs were
written and simulated; one for Lord Flow study to
know the pre-fault bus voltages based on GaussSeidel Method; the other for Short Circuit Studies
which made use of Thevenin’s theorem application.
The highest Circuit Breaker Capacity established by
the result of this study is relatively lower and the
investments needed for this are smaller compared
with the normal practice with PHCN system. This
reveals that PHCN system can be protected with this
low capacity circuit breaker with a reduced cost
effectiveness and equal sensitivity which is a breakthrough in terms of Circuit Breaker Capacity in the
field of power system
Protection.
Paper I. d:
IJERTV3IS030541
Journal: International
Journal of Engineering
Research (ISERT)
ISSN – 1270 – 0181
May 2014
14
Modelling of Electricity
The introduction of deregulation into the
6th European Electricity
Page 10 of 12
COA. Awosope
Market in Europe:
Lessons for
Nigeria
15
Long-term Electronic
Load Forecasting for the
University of Lagos
Using Regression
Analysis Method
power system planning ,operation and marketing has
et al.
been reported to improve the system efficiency and
reduce loss of revenue and at the same time
encourage entrepreneur.
From South America (Chile) to the Europe (England
and Wales) to the North America (Pennsylvania-New
Jersey-Maryland interconnection) the story has been
quite similar except for a few pockets of challenges
in these places. This foregoing experience with the
power system deregulation has been able to boost the
interest of Africa, especially Nigeria in the quest for
power restructure for improved efficiency.
In the proposed work, the various market models of
European electricity markets (EEM) shall be
reviewed in order to fashion a more efficient market
model for Nigeria.
It is strongly believed that the model developed here
could be adapted by any developing economy with
serious preference for African and Asian countries.
The University, as a centre for research into the
COA. Awosope
development of a nation, require constant supply of
et al.
electricity. In order to achieve this, it becomes of great
important to evaluate the precise amount of energy
required for continuous and uninterrupted power
supply to the academic community.
In line with this goal, this work investigates the
historical load consumption of the University of Lagos
community from which an electrical load forecast for
the future energy requirement of this community can
be proffered using the regression analysis method. It
is the intent of this work to establish a mathematical
model via the regression analysis method for the
assessment of the historical data in order to predict a
Page 11 of 12
Market (EEM 09).
Conference, Leuven,
Belgium, May 26 - 29,
2009.
Journal of Engineering
Research, JER- 15, No1,
March, pp69-79. 2010
16
A study of the Effects of
Electricity supply
Regulation on Nigerian
Consumers
fairly reliable future energy requirement for the
community, with special consideration for the next
one decade i.e long-term load forecasting.
Even though this method is examined using a
University community, it can be further extended to
cover the whole country, provided the historical data
of the country’s past electric energy consumptions
available.
There is a need for reform in Nigeria’s electricity
supply in order to remove the regulatory barriers so
as to encourage Demand Management (DM) in our
electricity industry especially at the load end but the
influence of the separate sector of the electricity
market must be protected through a number of
measures that ensure that no segment of the market
is short changed, at the long run. The work reported
here examines the need for the establishment of
independent regulatory activities in Nigeria to make
the process of price regulation more efficient,
consistent and predictable and less amenable to
arbitrary judgments of the regulators.
It also examines the need of private sector
participation and reforms in the energy sector so that
such can secure the supply of electricity in the nation.
Finally, governments and regulators must provide a
clear signed to the electric sector that all
environmentally safe cost-effective demand-side
resources should be deployed before the use
traditional fossil-fuel supply -side resources.
Page 12 of 12
COA. Awosope
et al.
Journal of Engineering
Research, JER-15, No 2,
June, pp 58-63. 2010