Department Of Electrical/Electronic Engineering Journals


U. Umar, M. J. E. Evbogbai, J. G. Bashayi, R. K. Soremekun, B. A. Omojola, (2016). Application of Battery Energy Storage System to Optimize Renewable Energy Resources to the Grid, International Journal Of Advancement In Engineering Technology, Management and Applied Science (IJAETMAS), 3 (10), pp. 52 – 67.

ABSTRACT

 Owing to the uncertain nature of energy from renewable sources like solar and wind, electric power generated from these sources are highly unreliable and may upset both the power quality and…
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M. J. E. Evbogbai , R. E. Okonigene, U. Umar, B. A. Kwembe, (2016). Renewable Energy Mix: Accelerative Measure For African OffGrid Communities Sustainable Development, International Journal of Innovative Research and Advanced Studies (IJIRAS), 3 (8), pp. 141 – 147.

Abstract:

 Autonomous diesel-based power system infrastructure in off-grid rural areas has a long time well-known history in many developing countries. However, successful operations of many of the standalone energy system have been obstructed by unexpected soaring price of the fuel…
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Anyasi, F.I, Obiazi, A.M.O,  Evbogbai, M.J.E, Akpaida, V.O.A, Onianwa, C.U, Ebegba, D, (2012). Information Technology in Engineering for Sustainable Development, IOSR Journal of Electronics and Communication Engineering (IOSR-JECE), 3 (3), pp.12 – 21.

Abstract:

Interest involves the review of information technology in engineering for sustainable development. This takes a look at the relevance of information technology in Engineering with reference to the several form of information exchange between two or more computers through any of the several methods of interconnections.…
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Omorodion I.I,  Obinabo C.E , Evbogbai M.J.E, (2016). Modeling, Design and Simulation of Active Suspension System Root Locus Controller using Automated Tuning Technique, Mathematical Theory and Modeling, 6 (1), pp. 52 – 56.

Abstract

 Car suspension system is a mechanism that separates the car from the tire. The objective of the suspension system is to improve a ride quality by ensuring passenger’s comfort and good car road handling when the car is subjected to an input excitation. The dynamics of…
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Omorodion I.I, Obinabo C.E, Evbogbai M.J.E, (2016). Optimal Frequency Response Controller Design of Active Suspension System Using Automated Turning Technique, Journal of Engineering Science and Application (JESA), 9 (1), pp. 69 – 75.

Abstract

Car suspension system is a mechanism that separates the car from the tire. The objective of the suspension system is to improve a ride quality by ensuring passenger’s comfort and good car road handling when the car is subjected to an input excitation. The dynamics of…
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Okonigene R.E, Ojieeabu C.E, John S.N, Evbogbai J.E, (2012). Developed Application for Voting using Biometric Data to Eliminate Election Irregularities, International Journal of Science and Advanced Technology, 2 (9), pp. 14 – 17.

Abstract

This work is part of an ongoing research work carried out to eliminate election irregularities in Nigeria. This developed application, which we tagged “VotingApp”, for the proposed work was simulated using web related applications.   VotingApp is secured application software for organizing voting and voters’ registration exercise.…
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Evbogbai M.J.E, (2011). Computation of Electrical Parameters of Zinc Oxide Varistors, Global Jour. Of Engg. & Tech., 4 (4), pp. 521 – 528.

Abstract

The application of Microsoft excel software in the computation of the electrical parameters of zinc oxide varistors developed using local available materials in Nigeria is presented in this work. The electrical parameters of interest were the clamping ratio, continuous operation voltage, nonlinear coefficients and capacitance. The result revealed that an optimum composition of 98 percent zinc…
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Evbogbai M.J.E, Aliu P..A, Yeboah J.K, Iyere S.F, (2011). Performance Analysis of Locally Made Electric Oven, Journal of Engineering Science and Applications (JESA), 7 (2), pp. 53 – 72.

Abstract

Electrical appliances are designed to operate at standard voltage and frequency. In this paper the effect of mains voltage variation on the performance of an electric oven developed using locally available materials in Nigeria is presented. The result revealed that an optimum performance was obtained at a rated voltage of…
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Abstract

Zinc oxide (ZnO) varistors are electronic device that are suitable for surge voltage protection for low, medium and high voltage applications. The raw materials for the production of varistors are widely available in Nigeria. Exploratory research and development has shown that varistors can be produced locally using available resources. The local production of the ZnO varistor in Nigeria will create job opportunity and conserve the scarce foreign exchange expended on the importation of ZnO varistors. The major challenges…
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Evbogbai M.J.E, Edeko F.O, Ajuwa C.I, (2011). Nonlinear Coefficients of Zinc Oxide Varistor, Global Jour. Of Engg. & Tech., 4 (1), pp. 41 – 44.

ABSTRACT
The nonlinear coefficients and other electrical properties, which support the use of ZnO varistor developed in Nigeria using locally materials, are presented in this work. The varistor was produced through conventional ceramic process at a sintering condition of 1260oC, 2hours. The thickness and diameter of the varistor were 1.32mm and 14.24mm respectively. The threshold…
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Abstract

Zinc oxide varistors were developed using locally available materials. The composition of the samples includes ZnO, 98; Bi2O3 and CoO 1% respectively. The compositions were mixed in a polyethylene container using zirconia balls. Cassava starch was a binder. The samples were passed using steel rings as moulds. The passed samples were sintered at 1260oC for 3 hours in an electric furnace. The samples were allowed to cool down to room temperature in the furnace. The electroded samples were…
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Evbogbai M.J.E, Okonigene R.E, Akhadelor S.A, Utiome F.A, (2005). Reliability Analysis of Electric Power Supply in the Niger-Delta Region of Nigeria – Nepa Sapele Undertaking As A Case Study, African Journal Sci., 6(1), pp. 1196 - 1203

Abstract

The reliability of electrical power supply of NEPA in Sapele, for a period of seven years (January 1996 - December 2002) was investigated. The reliability parameters was accessed using both the quantitative and qualitative analysis. Enerhen - Agbarho 33kV feeder had the…
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ABSTRACT
The effect of load variation on 1.4kVA, 24/220volts, 50Hz, single phase inverter is presented in this work. The inverter is fed from a 120A-H, 24volts battery to produce a 220volts, 50 Hz to power alternating current loads. The no-load voltage was recorded to be 24volts. Eight, 200watts filament bulbs were used as loads in this experiment. The load was varied in step increment of 200watts by bulb addition. As the load increases, the load current and voltage and terminal…
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ABSTRACT
The possibility and economic implication of the commercialization of zinc oxide varistors developed using locally available materials in Nigeria is presented in this work. The study revealed that Nigeria has 4.63 metric tons reserve of Zinc which is the major constituents of zinc oxide varistors. The successful commercialization of these functional, protective semiconductor devices would create employment opportunity, income and wealth. The financial analysis revealed that the investment is a profitable venture with a profit ratio of…
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ABSTRACT
Varistors provides excellent protection of electric circuits and equipment against voltage surges which may have frequencies related or unrelated to the power system network. The effects of frequency variation on the electrical parameters of zinc oxide varistor developed in Nigeria using locally available materials are presented in this work. The electrical parameters of interest of the zinc oxide varistors examined were the voltage, current and capacitance. The result obtained revealed that an inverse relationship exist between capacitances and…
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ABSTRACT

The maximum power points of a 100watts, 17.5 volts, MBF:100 type solar panel mounted in Ambrose Alli University, Ekpoma, Nigeria for different hours of the day, under various resistive load conditions had been presented. The photovoltaic module exhibits a non-linear irradiance dependent voltage – current characteristics and the maximum power point varies with solar insolation. The maximum power point of 49.53watts occurs at 1.00pm when the sun is overhead. The result shows that the power generated varies…
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ABSTRACT

The successful development of a 1.5kW, 220Volts, 50Hz, single phase industrial electric oven using equipment and components available in our local electrical and electronic stores is presented in this work. This device would be suitable for de-moisturizing damped electrical equipment and components The Nickel-Alumel heat resistance element used in this work has a maximum temperature range of 400oC. This heating element was housed in the roof of the heating chamber having a volume of 91656cm3. The internal…
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ABSTRACT

The successful development of zinc oxide varistors using locally available materials in Nigeria is presented in this work. This functional semiconductor device protects circuit against voltage surges. The physical dimensions, electrical properties, capacitance, the effect of supply frequency variation on the capacitance of the locally fabricated ZnO varistors were examined and a comparison of these properties with the imported ones undertaken. The composition of the samples includes ZnO 97-100mol% and 0-3mol% additives (Bi2O3 and CoO). The compositions…
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ABSTRACT

The nonlinear properties of varistors, which are composed of ZnO-Bi2O3-based ceramics produced by conventional ceramic process using locally available materials in Nigeria, were investigated at various CoO contents. The increase of CoO improves the densification of ceramics and could withstand a drop impact test about 2m high. The highest nonlinearity was obtained from the varistor with 1.0 mol% CoO, with 70.8 in nonlinear exponent, varistor voltage of 125V and 2?A in leakage current. The further CoO addition…
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ABSTRACT

Zinc oxide varistors are functional ceramic based semiconductor devices with highly nonlinear current-voltage characteristics similar to back-to-back zener diodes. Its development and implementation in protecting electronic, electrical and power distribution and transmission circuits from the destructive voltage due to lightning and switching surges has been on for almost four decades. The raw materials for the mass production of these protective devices are available in Nigeria. This work is aimed at revealing some of the indigenous approaches adopted by the…
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ABSTRACT
This paper examines the controlled variation of the r.m.s value of the alternating voltage applied to a load through an inverse parallel thyristor pair. Analyses of the first fundamental component of the Fourier series of the load current from the laboratory test results are present. Other dependent variable such as distortion factor, displacement factor and
displacement angle were examined using a firing angle (?) or 300 for the thyristors. The thyristor used was TIC 106M, with current rating (IT(ava) Max). of…
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ABSTRACT

Solar panels convert sun energy directly to electric energy using the principle of photovoltaic effect. Exploratory research and development has shown that Nigeria has high solar energy potential with an average sunshine of about 10 hours per day throughout the year. This huge renewable energy resource can be converted to electric energy for the benefit of mankind. The major challenges facing the development and implementation of photovoltaic power generation includes, finance, non-availability of process equipment, lack of…
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The voltage-time characteristics of a 140 W, 33 V solar panel is presented in this research. The readings and plots obtained shows that the terminal voltage of solar panel depends on time of the day. Between 7:30 am to 6:00 pm, the terminal voltage of solar panel is at maximum. From 7:00 pm to 6:00 am, the terminal voltage of the solar panel is zero. A storage battery is therefore, necessary to store electrical energy to be used at night.…
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This study present a 3kVA, single-phase alternating current, electric are welding machine and a battery charger in one unit. The device was designed, fabricating and tested using material and tools available locally in Nigeria. The work was achieved through the design and construction of a core type power transformer, which step down the 220 Volt main voltages to the appropriate voltage levels of 14 Volt, 26 Volts and 90Volts respectively. The 14 and 26 Volts were rectified using bridge rectifies…
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Car suspension system is a mechanism that separates the car from the tire. The objective of the suspension
system is to improve a ride quality by ensuring passenger’s comfort and good car road handling when the car is
subjected to an input excitation. The dynamics of the suspension system was mathematically modeled. The
system transfer function determined. The suspension system performance characteristics of overshoot and
settling time set at not more than 5% and 5seconds respectively. Frequency response controller was…
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Interest involves the determination of G.S.M signal strength in Mud, Block and Steel buildings in Ekpoma. Existing path loss exponent values were studied to determine the extent to which building characteristics (in terms of its construction and materials) affect propagated signal. Measurements of signal level taken at different building type were recorded to determine the path loss exponent values, which were 7.33, 8.33 and 12.67dBm for Mud, Block and Steel buildings respectively. A model was statistically developed for each of…
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Car suspension system is a mechanism that separates the car from the tire. The objective of the suspension system is to improve a ride quality by ensuring passenger’s comfort and good car road handling when the car is subjected to an input excitation. The dynamics of the suspension system was mathematically modeled. The system transfer function determined. The suspension system performance characteristics of overshoot and settling time set as not more than 5% and 5seconds respectively. PID controller was designed…
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Proper coordination of protective relays at substation renders a significant part in the safe operation of power system. The principal aim of coordinating protective relays in a power system network is to obtain selectivity without sacrificing sensitivity and fast fault clearance time. In order to minimize outages, proper coordination of protective relays must be ensured. As a result of increased urbanization, a substantial increase in electric power demand has been recorded in recent years. But, owing to ineffective coordination of…
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There are several benefits for using renewable energy sources such as emission reduction, lowering of cost and technological gain. In many remote communities in the world, standalone power systems utilizing renewable sources of energy are widely deployed to counter the widespread of energy shortage conditions. The present days? quest for emission reduction from energy systems couple with the intention for rural electrification has fostered aggressive research directives for renewable energy for sustainable development. The major contributions to the existing body…
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Car suspension system is a mechanism that separates the car from the tire. The objective of the suspension
system is to improve a ride quality by ensuring passenger’s comfort and good car road handling when the car is
subjected to an input excitation. The dynamics of the suspension system was mathematically modeled. The
system transfer function determined. The suspension system performance characteristics of overshoot and
settling time set at not more than 5% and 5seconds respectively. PID controller was designed…
READ MORE Download Staff Profile      


The maximum power points of a 100watts, 17.5 volts, MBF:100 type solar panel mounted in Ambrose Alli University, Ekpoma, Nigeria for different hours of the day, under various resistive load conditions had been presented. The photovoltaic module exhibits a non-linear irradiance dependent voltage – current characteristics and the maximum power point varies with solar insolation. The maximum power point of 49.53watts occurs at 1.00pm when the sun is overhead. The result shows that the power generated varies with time and…
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Zinc oxide (ZnO) varistors are electronic device that are suitable for surge voltage protection for low, medium and high voltage applications. The raw materials for the production of varistors are widely available in Nigeria. Exploratory research and development has shown that varistors can be produced locally using available resources. The local production of the ZnO varistor in Nigeria will create Job opportunity and conserve the scarce foreign exchange expended on the importation of ZnO varistors. The major challenges facing the…
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The paper presented the different classes of amplifiers as A, B, AB and C with D at the head of the class. Class D amplifiers are distinguished from all others because their power transistors are always operated either fully on or fully off. Moreso, they possess performance superiority over other audio amplifiers and work with low level analogue signals. Frequency response is another prime performance issue for class D amplifiers and suffer from the effect of power supply modulation. The…
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The reliability parameters for electric power supply to Ambrose Alli University, Ekpoma, fed from the 11KV feeders in a rural distribution Network of N.E.P.A was evaluated. The availability was assessed to be in the neighbourhood of 98% on the average for the five years period (January 1998 – December 2002) under study. The 2% unavailability was very significant, hence effort should be geared towards attaining the 100% international standard of availability. The System Average Interruption Duration Index (SAIDI) for the…
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This study addressed the power supply situation in the 11KV feeders in Ekpoma distribution area of NEPA from January 1998 to December 2001. The study clearly shows that the Ekpoma 11KV distribution area network had 98.46% availability as against the international standard of 100%. The 11KV Irrua feeder had the lowest availability of 98.05% while the 11KV Iruekpen feeder had the highest availability of 98.79%. The 11KV Express feeder had the least number of outages of 217 representing 29.93% for…
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The reliability of electrical power supply of NEPA in Sapele, for a period of seven years (January 1996 – December 2002) was investigated. The reliability parameters was assessed using both the quantitative and qualitative analysis. Enerhen – Agbarho 33KV feeder had the highest availability of 94.31% while Sapele town and Amukpe 6.6KV had the least availability of 85.99% and 86.03% respectively which were for below the international standard of 100%. The study revealed that most of the outages faults were…
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In Sapele undertaking , Sapele town and Amukpe had the highest number of outages, which correspond to 550 and 546 respectively out of total 1748 outages for the seven years of studies. The unavailability of these feeders was due to both symmetrical and asymmetrical fault conditions. This study revealed that Sapele installation had been in existence for over four decades, hence, there is urgent need for upgrading and replacement of obsolete equipment. The study also showed that planned maintenance…
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 A 5KVA, 220 50V, 50Hz, single phase center – tapped transformer which can serve industrially for electric arc welding and electric furnace was constructed. The design analysis of the core type transformer was constructed from 100% locally available tools and materials. The transformer consisted of the core, windings, former, insulation, clamping devices and tank. Test conducted on the transformer showed that an efficiency of 92% power factor of 0.795 and voltage regulation of 86% was achieved.


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This paper presents a multipurpose 1kVA D.C power supply unit with adjustable voltage. This was achieved through the design and construction of a core type, 220 volts power transformer, which was stepped down to the appropriate voltage levels of 15volts, 30 volts and 60 volts respectively. The secondary voltage was rectified using diode rectifier connected in bridge mode. This machine was cheaper when compared with the imported one of the same capacity. The D.C power supply had wide application in…
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The design and construction of a 5KVA electric-arc welding machine for welding ferrous and non-ferrous metals using locally available tools and materials is presented. The welding transformer on testing showed efficiency of 97%, a voltage regulation of 86% and a power factor of 0.8. The dual purpose electric welding machine combined the advantages of both the AC and DC Electric arc welding machine in one unit. This design costs N43,525.00 as compared to about N110,000.00 which is the total…
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The design and construction of a 5kVA D.C electric arc welding machine using locally available tools and materials is presented. The D.C electric arc welding machine had a step down transformer and rectifier unit. On testing, it shows an efficiency of 97%, voltage regulation of 86% and power factor of 0.795. The cost of the locally fabricated D.C electric arc welding machine was N40, 525.00 as compared to N60, 000.00 for the imported machine of similar capacity.

 

 


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This paper presents the design and construction of a split, direct current (D.C) power supply unit for a 1000W audio power amplifier. Open circuit test of the transformer was conducted and the power factor was determined to be 0.795, while the efficiency was found to be 92% at short circuit test. The percentage voltage regulation was 93.41%. The transformer was operated at 90% of its maximum load rating. This split D.C power supply unit was regulated at ±65V. When…
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The need to fast charge a battery, that discharges rapidly cannot be overemphasized, hence a mains operated fast charger for 12volts and 24volts batteries was presented. It consists of a 1kVA, single phase and 50Hz step down transformer. A SKB60/08 bridge rectifier having a current rating of 60A and a 30, 000?f electrolytic capacitor having a working voltage of 100 volts was used for filtering. A rheostat was provided to manually regulate the charging current to prevent over charging, which…
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The comparalive analysis of the inverse parallel connected thyristor-thyristor and thyristors-diode power controller configura1ions are presented in this paper.

The controlled variations of the r.m.s value of  the  alternating  voltage applied to a load via power controller scheme were examined . Analyses of the first fundamental component of the Fourier series of the load current were presented. The normalized value of the load current (ILnorm)  at  various firing angle (?) varying from 0 to 180° were obtained and plotted for…
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In this paper . the cumulative score control schemes are designed to detect a shift in the NEPA Transformers mean loading rate in Nigeria. The designed schemes are used on data obtained from NEPA 's National Control Center (NCC), Oshogbo for the period of six months, January - June, 2001. The result shows that the method has a good potential as remedy to preventing faults


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The possibility and economic implication of the.commercialization of zinc

oxide varistors developed using locally available matenals n Nigeria is presented in this work. The study revealed that Nigeria has 4.63 metnc tons reserve of Zmc which is the major constituents of zinc oxide varistors. The successful commercialization of these functional, protective semiconductor devices would create employment opportunity, income and wealth. The financial analysis revealed that the investment is a profitable venture with a profit. Ratio of 61.34% and a high…
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This paper examines the failures associated with the Grid System of the National Electric Power Authority in Nigeria, for a period of seven years (January 1995 December 2001). The study revealed that the nation experienced a total of 95 grid system collapses, of which 37 was for the total collapses and 58 partial collapses. In addition, the year 1997 recorded the highest number of system disturbances. It was followed by the year 1998. The values of the disturbances were 20…
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he mains voltage is 240 volts at 50Hz in United Kingdom, Russia and Nigeria, where as the mains voltage is 110volts al 60Hz in United Stale of America and the rest of Europe. This paper present design, construction and testing of a static converter, which converts the 240 volts 50Hz mains supply to 110volts, 60Hz. The converter is necessary as it enable electronic equipment design for the American and European market to  operate satisfactorily in Nigeria. The fabricated converter worked…
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This paper presents the design and construction of a 5KVA A. C electric arc welding machine using locally available tools and materials. The A. C electric arc welding machine which has a step down transformer on testing shows efficiency of 97%, voltage regulation of 86% and power factor of 1.0. A cost analysis revealed that the locally fabricated welding machine would cost only #37,525.00 as compared with N50,000.00 which is the current cost of the imported welding machine of similar…
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The effect of load variation on 1.4kVA, 2-l/220volts, 50Hz, single phase inverter is presented in this work. The inverter is fed from a 120A-H, 24 volts battery to produce a 220volts, 50 Hz to power alternating current loads. The no-load voltage was recorded to be 24volts. Eight, 200watts .filament bulbs were used as loads in this experiment. The load was varied in step increment of 200watts by bulb addition. As the load increases, the load current and voltage and terminal
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Control circuit for an electric blender is designed and constructed. It uses two 555 timers, one is connected in the monostable mode which determines the overall period of operation, while the other is connected in a stable mode which determines the intermittent operation of the blender. This saves the operator from the rigour of continuous switching 'ON ' and 'OFF ' until processing is completed. A transistor amplifier is used to supply the sufficient current Ic to energize the 12
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Leakage of current to earth due to insulation breakdown between the live conductor and earth could have disastrous consequences on the sqfety of operating personnel of high­ voltage and heavy - duty electrical machines. In addition, the output power of the given equipment drastically reduces, leading to unsatisfactory performance. It is absolutely necessary therefore, to interrupt and isolate such faults quickly, with minimum delay. A high sensitivity, fast response, voltage-operated earth leakage circuit breaker (ELCB) with in-built discrimination is presented.…
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A multi-zone solution to vertical transportation in high-rise buildings is proposed. Typical examples are presented to illustrate the validity of approach. The most economic and efficient number of zones for given building heights and population is derived. The criteria for the delimitation of zones for particular buildings is also presented. This approach .eliminates long queues at main lobbies as lift passengers travelling to different floor levels easily pick the lift cars serving their floors. The alternative solution to zoning-single zone…
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The effect of time on photovoltaic power generation in Nigeria is investigated in this work . From the study it is clear that the voltage generated depends on time of the day, time of the year, climatic conditions and the geographical location of the site.

The power generated is only available during the day between 6.00am- 7.00pm local time, in the month of January. While in July beyond 7.00pm power was still generated, longer day. Between 7.00pm to 6.00 (night…
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Car suspension system is a mechanism that separates the car from the tire. The objective of the suspension system is to improve a ride quality by ensuring passenger's comfort and good car road handling when the car is subjected to an input excitation. The dynamics of the suspension system was mathematically modeled. The system transfer function determined. The suspension system performance characteristics of overshoot and settling time set at not more than 5% and 5seconds respectively. Frequency response controller was…
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Transformers are electromagnetic energy transformation devices which operate on the principles of electromagnetic induction. The devices transform alternating current voltage from one value to another at a constant frequency. This work reviews the development of these functional devices using locally available materials in Nigeria. The design stages, material selection, manufacturing techniques, performance parameters such as efficiency, voltage regulation and power factor were also discussed. Some applications of the locally developed transformers were presented. The possibilities of producing larger power transformers…
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The focus of this paper is on the controllability and observability of an active suspension system used in automobile. The primary responsibility of control system Engineers is to design and implement controller. The active suspension system dynamics was captured by a mathematical model. The system transfer function model was determined by using the road disturbance as input and the car response as output. The state - space representation was subjected to controllability and observability test using MATLAB commands. The result…
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This paper examines the controlled variation of the r.m .s value of the alternating voltage applied to a load via thyristor · thyristor based power controller scheme. The thyristors are connected jn Inverse Parallel configuration. Analyses of the first fundamental component of the Fourier series of the load current were presented. The normalize val ue of the load current (ILnorm) at various firing angle ( ?) varying from 0 to 180° were obtained and plotted . The thyristor·thyristor pair shows…
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The solar energy conversion efficiency of a 100watts, 12 volts solar panel mounted in Ambrose Alli University, Ekpoma, Nigeria is presented. The conversion efficiency parameters of interest were the maximum power point and the fill factors .These factors were evaluated using the short circuit current , open circuit voltage, current and voltage for various resistive loads which were measured directly using 2 digital Multimeter DT9205A. The highest solar energy conversion efficiency of about 50% occurs at 1,00pm and the maximum…
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The paper reports on the distribution transformer failure in some selected substations in Ekpoma Undertaking of the National Electric Power Authority (NEPA), of Nigeria. The study revealed that most of the damaged distribution transformers were either due to lightning strikes or overloading effects. The effect of these, results to incessant power failure and load shedding. It was also revealed that poor earthing of the substations were responsible for failure resulting from lightning strikes and hence damages to the distribution transformers.…
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This paper presents a comparative analysis of measurement accuracy of single phase prepayment meters under different loads. This study was motivated by users complain on variations in metering from different energy meter models.
The experimental method was adopted in this study.The experimental setup involved a digital stop watch, the developed meter and two specimensof existing commercial meters. These meters were connected to varying load under the same measurement conditions. The time taken to consume 0.01kWh in each load category for…
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In this paper, an assessment of prepayment electricity consumers’
experiences and the desired improvements on existing meters in
parts of Benin City and Warri was carried out. The methodology
involved field data collection through the use of questionnaires
on electricity consumers especially those using prepayment
meters in Benin City, Edo State and Warri, Delta State. The field
data were collated and analysed to determine the extent the
suggested improvements were actually desired by the users. The
results show that no…
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In this paper, an Application Platform (AP) and Token Generation Software for prepayment meter administration
was developed. This is a response to the need to develop a vending software and platform that can recharge a generated token
seamlessly into the meter apart from the traditional keying-in of token into meter through keypad. Also, it is motivated by the
need to reduce the cost of token generation infrastructure by having a software for token generation achieved with local
material. It is…
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This paper presents the analysis of the h-parameter of a single stage small signal transistor amplifier using twoport
network. This is motivated by the need to have the rudimentary knowledge of the h-parameter transistor analysis model
and to demonstrate its equivalence in the three configuration of the transistor. In this analysis, it was borne in mind the
characteristics of a small signal operating conditions of the transistor. Among these characteristics is the assumption that Small
– signal operations applies when…
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This paper presents a GSM-based Prepayment Electric Energy Meter implemented with hybrid recharging mode:
Mobile Station (MS), Supply Authority Platform and the Keypad. The system was designed around two modules; the hardware
and software. The hardware module consists of ADE7755 used to generate the consumption pulses that are measured and
recorded by Atmega328P. Atmega2560 was used to manage the unit consumption; control and monitor the activities of the
meter. SIM900 was used to achieve the SMS recharging and communication capability.…
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This paper presents a method of Token Validation of a wireless recharge token in Prepayment Energy meter
without recourse to any server. Most proposal on wireless recharging have suggested token validation at the server in the
Supply Authority’s office. The need for Prepayment Energy Meter to be able to validate token from a wireless source without
the help of an intermediary system is highly desirable. The Prepayment Meter is realized with an ADE7755, Atmega328 and
Atmega2560 in its circuitry among…
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In this paper, a Short Message Service (SMS) Based Prepayment Energy Meter Monitoring System for
Consumers and Utility Companies is developed. This is borne out of the desire of consumers to be able to monitor their meters
especially their consumption. Also, the utility companies need to be able to monitor energy meters wirelessly especially for
energy auditing and other control as may be needed. The Energy Meter consists of ADE7755 for consumption pulse
measurement which is recorded by arduino Atmega328P.…
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In this paper, a developed GSM-Based SMS token recharge system for Prepayment meters is presented. The versatility of the GSM technology is put to use to enable wireless meter recharge to the comfort of the users.
The meter consists of ADE7755 used to generate the consumption pulses that are measured and recorded by Atmega328P. Atmega2560 was used to manage the unit according to consumption. It also controls and monitors the activities of the meter and communicates using SIM900 to achieve…
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In this paper, a mathematical analysis of a Small-Signal Single-Stage Transistor Amplifier using Hybrid
Parameter and the development of a software to aid this analysis was carried out. This was borne out of the desire to be able to
correctly and accurately analysis small signal transistors to get the required performance quantities that can be used in the
design of circuits. Also, the need to carry out this analysis with minimal error and time was of great motivation for this READ MORE Download Staff Profile


In this paper, the design and implementation of automatic tamper detection and reporting capability of Energy meter was carried out. The system has the capability to detect bypass internally on the meter and externally on the service cables from the electric pole. It also incorporates wireless disconnection and connection of load capabilities. This becomes imperative as a result of high rate of energy theft that arises from meter tampering. The system comprises of a developed Single Phase Prepayment Energy Meter…
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The analysis of the impact of integrating the power generated from Generation Company of Nigeria (GENCO), Nigeria Independent Power Project (NIPP) and the Independent Power Producers (IPP) into the existing 330kV transmission network is presented in this work. The analysis is carried out using ETAP 12.6 and MATLAB software for the existing and the proposed 330kV grid network. The result indicates that with the proposed integrated 330kV network, the power losses on each transmission lines reduced by 0.48MWwhich indicates 46%…
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The impact of the proposed integrated 330kV network on the transfer capacity of the existing 330kV network is analyzed in this work using ETAP 12.6 and the results analyzed with MATLAB software. The results obtained indicates that the transfer capacity of the entire network is increased by 2GW with the proposed integrated 330kV network. This will eradicate system collapse and more load will be accommodated in the network without stressing the network beyond it thermal limits.


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The effect of environmental conditions on photovoltaic modules is presented in this work. The average terminals voltages of three solar panels of 6, 12 and 33volts mounted on a gabbled rooftop of about 15meters high were examined for different priods.The result from the experiment reveals that the 6, 12 and 33volts panels by 7.30am generate their respective rated voltages. Further examination shows that between 12.00noon and 1.00pm local time, the panels output were maximally 9, 20.2 and 38volts…
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This work analyses the Economic Dispatch of the power generated from the Proposed Nigerian 330KV integrated network using ETAP 12.6 software and the result simulated by Matlab software. The result obtained revealed that not all the generating stations of the Proposed Nigerian 330KV network will be in circuit during optimal power flow. The generating stations that are out of circuit are thermal power stations. This reduces the cost of generation, waste as well as saves energy from the…
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