Papers by Omowumi Olomo Olasunkanmi
Applied Journal of Environmental Engineering Science, Dec 30, 2019
Electrical and electronic devices require protection against voltage drop, overshoot, and fluctua... more Electrical and electronic devices require protection against voltage drop, overshoot, and fluctuation of the main supply. A microcontroller-based circuit was designed where the main voltage connected to the board feeding the controlled devices was monitored by this circuit and ensure the voltage is measured within a required voltage range (RVR). The circuit was kept monitoring the power supply and ensures the main voltage connected to the board feeding the controlled devices connected if it measures within a required voltage range (RVR). If the voltage falls below or above the RVR then the main supply would be disconnected from the feeding board. The circuit then will keep monitoring the voltage and reconnect it to the feeding board once its amplitude falls back stable in the required voltage range. This design was simulated successfully using Proteus software.
Journal of Engineering Studies and Research, 2020
This study examined electricity consumption in a Nigeria township with a view of understanding th... more This study examined electricity consumption in a Nigeria township with a view of understanding the challenges faced by electricity consumers and to proffer practicable suggestions for sustainable electricity supply. Major findings emanating from the study show that 26.7 % of respondents acknowledged the electricity supply through the electricity service provider (ESP). Again, 71 % of respondents relied on electricity through the alternative’s sources complementing ESP services. Furthermore, 75 % of respondents confirmed a temporal supply of 5 hours daily representing 20 % daily electricity supply. In another dimension, in terms of billing, 62.4 % received estimated electricity bills as many homes are without electricity meters. Finally, this study revealed some planning and policy implications and provided recommendations through which electricity consumption in the state could be improved upon.
Energies
Regular and reliable access to energy is critical to the foundations of a stable and growing econ... more Regular and reliable access to energy is critical to the foundations of a stable and growing economy. The Nigerian transmission network generates more electricity than is consumed but, due to unpredicted outages, customers are often left without electrical power for several hours during the year. This paper aims to assess the present reliability indices of the Nigerian transmission network, and to determine the impact of HVDCs on system reliability. In the first part of this paper, the reliability of the Nigerian transmission system is quantified by building a model in DIgSILENT PowerFactory and carrying out a reliability study based on data provided by the Nigerian transmission-system operator. Both network indices and load-point indices are evaluated, and the weakest points in the network are identified. In the second part of the paper, an HVDC model is built and integrated into the existing network at the locations identified by the reliability study. A comparative study using tw...
Distribution system, a vital link between the bulk power system and end users, accounts for 90% o... more Distribution system, a vital link between the bulk power system and end users, accounts for 90% of power service interruptions. This study analyses faults occurring on power distribution network using Eleweeran and Poly Road 11 kV feeders in Abeokuta as case studies. Faults data, between 2014 and 2018, are collected for selected feeders using fault log books. Trend analysis of faults data is accomplished using MATLAB software with associated statistical measures (mean median mode, standard deviation, coefficient of correlation) determined. Reliability figure is thereafter computed for each of the two feeders. The mean and median of both actual and predicted fault values during the period under consideration are similar for the two feeders. The reliability index on Eleweeran 11 kV feeders showed that 2015 was the worst with failure rate of 1.55 and reliability figure of 0.21% while it was at its best in 2017 (failure rate of 1.07 and reliability of 0.34%). In the case of Poly Road 11...
Journal of Information Engineering and Applications, 2015
Power transfer distribution factor, (PTDF) is a useful factor for sensitivity analysis of line fl... more Power transfer distribution factor, (PTDF) is a useful factor for sensitivity analysis of line flows. It shows the linear and impact of a transfer of power. This research paper presents a PTDF model to evaluate the sensitivity of line flows using a 12-bus system as a case study. It is a polynomial model of order 6 whose order increases as more buses are injected into the system. A source and a sink were specified for each transaction for the flows of active powers from source to sink in a direction. PTDF provides a linear and approximation of how the flow on the transmission lines and interface changes in response to the transaction between the seller and buyer. The PTDFs are operating point dependent. Appropriate correction actions were taken to bring back the MW on the lines to within its operational limit to ensure that the MVA limit of the lines and all line flows are within operational limits. When the generation at bus 10 was reduced to 130MW and shedding the load at busses 2 ...
Synergy of Effective Power Sector and Town Planning Unit
Adapting Internet of Things and Neural Network in Modelling Demand Side Energy Consumption and Management
Çankaya University Journal of Humanities and Social Sciences, 2020
With the recent application of micro-grid system and off-grid renewable energy power system using... more With the recent application of micro-grid system and off-grid renewable energy power system using internet of things (IoT) for the efficacy in demand side consumption management. The study employed usage of IoT supported with statistical initiative (logistic regression) to develop a knowledge-based solution for energy demand side consumption management. The research adopted two approaches to model the energy consumption pattern of a user with designed sensor nodes for environmental data acquisition (DAC) monitoring and state of switches (load points). Leveraging on Internet of Things, the sensor node network transferred synchronized the data collected to Google Firebase cloud storage in real time. The data collected were used to train a logistic regression model for the prediction states of the receptacles and sensor readings. The study further investigated power usage (user) against human presence and hour (period) of the day separately and a mathematical model of the relationship ...
Enhancing Nigeria’s power grid performance through a hybrid transmission network
Nigerian Journal of Technological Research, 2019
The Nigerian power demand is increasing and the existing power grid has proved over-time to be in... more The Nigerian power demand is increasing and the existing power grid has proved over-time to be ineffective in meeting up with the increase. The transmission losses experienced on the grid account for a greater part of its problem. The hybrid setting (that is, integrating High Voltage Direct Current (HVDC) transmission lines) was proposed in this work. In the hybrid system, six existing transmission lines representing twenty-nine per cent (29%) of the total lengths of the transmission lines on the existing grid were converted to HVDC lines. Converter stations were introduced at the sending and receiving ends of the lines in the hybrid model. The modelling and simulation of the existing grid was done on Matlab/Simulink while that of the hybrid system was also carried out. The load flow results showed the voltage and load consumption profiles. The total loss on the existing network was 438.1MW while that of the hybrid just added up to 104 MW, the efficiency recorded were 91% and 97% respectively. The results presented the hybrid setting as a better option as improved voltage level was experienced and the losses were drastically reduced. Keywords: Grid, High Voltage Direct Current, Hybrid, Simulink, Transmission losses
Journal of Automated Methods and Management in Chemistry, 2005
Clinical chemistry analyser is a high-performance microcontroller-based photometric biochemical a... more Clinical chemistry analyser is a high-performance microcontroller-based photometric biochemical analyser to measure various blood biochemical parameters such as blood glucose, urea, protein, bilirubin, and so forth, and also to measure and observe enzyme growth occurred while performing the other biochemical tests such as ALT (alkaline amino transferase), amylase, AST (aspartate amino transferase), and so forth. These tests are of great significance in biochemistry and used for diagnostic purposes and classifying various disorders and diseases such as diabetes, liver malfunctioning, renal diseases, and so forth. An inexpensive clinical chemistry analyser developed by the authors is described in this paper. This is an open system in which any reagent kit available in the market can be used. The system is based on the principle of absorbance transmittance photometry. System design is based around 80C31 microcontroller with RAM, EPROM, and peripheral interface devices. The developed sy...
Load Flow Analysis of the Nigerian Transmission Grid Using DIgSILENT PowerFactory
2021 56th International Universities Power Engineering Conference (UPEC), 2021
The subject of this work is the development of a load flow model for the Nigerian 330 kV transmis... more The subject of this work is the development of a load flow model for the Nigerian 330 kV transmission system. The model has been developed in DIgSILENT PowerFactory based on data provided by the Nigerian Electricity system operator (NESO). Two scenarios (summer and winter) were considered: for each scenario, load data, generator data, and transmission line parameters were used as inputs to the model. The voltage profiles resulting from the load flow were compared with the original data, and some discrepancies were found. Assumptions and modifications were made to achieve load flow results that were closer to the system data. The results show that in summer and winter, power generated was 4804.10 MW and 4394.41 MW, respectively. The bus voltages were within the voltage magnitude of 0.85 pu and 1.05 pu, according to the local grid code. The model documented in this paper will be used as a baseline for reliability and stability studies. This research aims to identify potential reinforcements to the 330 kV Nigerian transmission system to meet future electricity demand.
Enhancing Nigeria’s power grid performance through a hybrid transmission network
Nigerian Journal of Technological Research
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Papers by Omowumi Olomo Olasunkanmi