Paul Olulope - Academia.edu (original) (raw)

Papers by Paul Olulope

Applied Engineering Letters : Journal of Engineering and Applied Sciences

In this work, a grid-connected small hydro-solar PV hybrid power system (HPS) was modeled to comp... more In this work, a grid-connected small hydro-solar PV hybrid power system (HPS) was modeled to complement electricity supply in Ado-Ekiti metropolis in Nigeria, and hence, investigated the steady state stability of the distribution networks with and without HPS integration. Consumers' load audit was carried out through measurement of apparent load at peak periods on each outgoing cable riser from the low voltage circuit of the distribution transformer using clamp-on ammeter which represents loads on respective 11 kV feeders. The solar PV system employed the use of JAP6-72-30/4BB solar PV module and average solar radiation intensity of 4.95 w/m 2 was considered when sizing the solar PV power system. The designed and modeled HPS was integrated into the grid through a hydro inverter and five numbers of parallel-connected 2000 kVA grid-tie solar PV inverters. Simulation analysis of the distribution networks with and without renewable energy integration was carried out using DigSILENT power factory. This work analyzed two scenarios for each of the distribution networks. Simulation results indicated that the networks were stable as evident in the analyses of the renewable grid integration and notable improvement on profile voltage (pu) of all the 11 kV distribution networks were observed.

2023 International Conference on Science, Engineering and Business for Sustainable Development Goals (SEB-SDG)

2022 IEEE Nigeria 4th International Conference on Disruptive Technologies for Sustainable Development (NIGERCON)

International Journal of Advanced Engineering, Management and Science, 2018

Due to the natural intermittent properties of some renewable energies, the grid is subjected to i... more Due to the natural intermittent properties of some renewable energies, the grid is subjected to instability, insufficient power delivery and fluctuation. When these renewable energies are combined together to address the challenge of power shortage, increasing energy demand, and voltage drop, the grid is subject to different stabilities issues compare to the single energy source. This paper compares the dynamic behavior of single energy with mixed energy sources. The paper compares the impact of DFIG alone, Solar PV alone and Small Hydro power alone with hybrid type under distributed generation concept on transient stability of power system. To investigate this investigation, a DIgSILENT power factory library models was used as a component model for wind Turbine / Solar PV and small hydropower system. The simulation was carried out on single machine infinite system.

Optimal capacitor placement in the distribution network is the most popular technique adopted for... more Optimal capacitor placement in the distribution network is the most popular technique adopted for the control of power loss and enhancement of Volts Ampere Reactive for effective power delivery. This study, therefore, discusses improvement of distribution efficiency of 11kV power lines through placement of capacitor banks in the network. Power flow in the network, Ado-Ekiti 11kV lines, was carried out using Newton-Rapson iteration method available in MATLAB while the analysis of the network was actualized using the conventional load flow equation modeling. From the analysis of the network, voltage deviation falls within the range of -5.9 to -180.5% which is completely outside the permissible range of ±5%. Voltage drop on the feeders is within the range (1.2 – 1.9) kV before and (0.2 – 0.7) kV after the reactive power of the network was compensated.

International Journal of Electrical and Computer Engineering (IJECE), 2020

A hybrid renewable energy system is at present accepted globally, as the best option for rural el... more A hybrid renewable energy system is at present accepted globally, as the best option for rural electrification particularly in areas where grid extension is infeasible. However, the need for hybrid design to be optimal in terms of operation and component selection serves as a challenge in obtaining reliable electricity at a minimum cost. In this work, the feasibility of installing a small hydropower into an existing water supply dam and the development of an optimal sizing optimization model for a small village-Itapaji, Nigeria were carried out. The developed hybrid power system (HPS) model consists of solar photovoltaic, small hydropower, battery and diesel generator. The optimal sizing of the system’s components for optimum configuration was carried out using Genetic Algorithm. The hybrid model’s results were compared with hybrid optimization model for electric renewable (HOMER) using correlation coefficient (r) and root mean square error (RMSE) to verify its validity. The results...

2013 IEEE International Conference on Industrial Technology (ICIT), 2013

The present grid is accommodating mixed energies resulting into increasing complexities and insta... more The present grid is accommodating mixed energies resulting into increasing complexities and instabilities. The dynamic performance is measured by also considering the impact the integration of new technologies such as distributed generation (DG) and hybrid distributed generation (HDG) have on the grid. Hybrid distributed generation with one or more renewable (stochastic) energy sources interact with the existing grid during import and export of power generation. This interaction contributes more fault current therefore making the system vulnerable to instability more than a single energy source. This study investigates the dynamic impact of hybrid Wind/ PV/small Hydro power on transient stability. To investigate this impact, a detail modeling of grid connected wind / solar PV and small hydropower system with single machine infinite system is carried out. The simulation was done in DIgSILENT power factory software. The configuration of the proposed typical grid connected hybrid distributed generation (HDG) consists of variable speed Wind turbine with doubly-fed induction generator (DFIG), solar PV and small hydropower system. The wind turbine is integrated through PWM converter into the existing Grid while the solar PV incorporated into the system consists of DC sources integrated through PWM inverter and the hydro power is directly connected through a synchronous generator.

Universities Power …, 2010

... This is equally confirmed in microgrid concept as reported in [9]. As a result ... Greater at... more ... This is equally confirmed in microgrid concept as reported in [9]. As a result ... Greater attention is currently diverted towards network planning, operation, analysis (dynamic stability assessment ... S.Rovnyak,S.Kretsinge,J.Thorp,D.Brown, Decision trees for real time transient stability ...

AIMS Energy

Most of the research in distributed generation focuses on power flow optimization and control alg... more Most of the research in distributed generation focuses on power flow optimization and control algorithm development and related fields. However, microgrids are evolving on multiple levels with respect to the chemical processes used to manufacture the underlying technologies, deployment strategies, physical architecture (which is important to the economic factor) as well as environmental impact mitigation of microgrids. Special use cases and paradigms of deploying Distributed Generation (DG) in harmony with agricultural or decorative purposes for existing spaces are emerging, propelled by research in frontiers that the DG engineer would benefit from being aware of. Also, offshore photovoltaic (PV) has emerged as an increasingly important research area. Many nascent technologies and concepts have not been techno-economically analyzed to determine and optimize their benefits. These provide ample research opportunities from a big-picture perspective regarding microgrid development. This...

Power and Energy Systems and Applications, 2012

ABSTRACT The present grid consists of mixed energy sources interacting with each other and with t... more ABSTRACT The present grid consists of mixed energy sources interacting with each other and with the grid. As a result the transient stability analysis should not be based on single source but on different sources. This paper presents the impact of hybrid solar-wind and small hydro distributed generation on transient stability of power system. Hybrid distributed generation with one or more renewable (stochastic) energy sources interact with the existing grid during import and export of power generation. This interaction contributes more fault current therefore making the system vulnerable to instability more than a single energy source. This study investigates the dynamic impact of hybrid converter-driven synchronous wind generation / PV/small Hydro power on transient stability. To investigate this impact, a detail modeling of grid connected wind / solar PV and small hydropower system with single machine infinite system is carried out. The simulation was done in DIgSILENT power factory software. The configuration of the proposed typical grid connected hybrid distributed generation (HDG) consists of hybrid Converter driven synchronous wind generation (CDSG), solar PV and small hydropower system. CDSG is integrated through PWM converter into the existing grid while the solar PV consisting of DC sources is integrated through PWM inverter and the hydro power is directly connected through a synchronous generator.

International Journal of Renewable Energy Research, 2012

The integration of hybrid distributed generation (HDG) is increasing today and the dynamic impact... more The integration of hybrid distributed generation (HDG) is increasing today and the dynamic impact is difference from the single energy source due to differences in dynamic characteristics of the generators involve. Hybrid distributed generation with one or more renewable (stochastic) energy sources interact with the existing grid during import and export of power generation. This interaction contributes difference level of fault current therefore subjecting the system to difference transient instabilities compare to single energy source. This study investigates the dynamic impact of hybrid Wind/ Solar PV/small Hydro power on transient stability. To investigate this impact, a detail modeling of grid connected Wind/ Solar PV and Small hydropower system with single machine infinite system is carried out. The simulation was done in DIgSILENT power factory software. The configuration of the proposed typical grid connected hybrid distributed generation (HDG) consists of Converter Driven ...

International Journal of Scientific & Technology Research, 2017

The electricity structure across the globe has changed from the vertically integrated to horizont... more The electricity structure across the globe has changed from the vertically integrated to horizontally integrated where technologies like distributed Generators, electric vehicle, renewables energy are integrated into the distribution network with a view of providing voltage upgrade, reducing power loss and to relieve transmission and distribution congestion. This is further transformed into smart grid through the use of computational intelligence techniques. In this paper, the optimal power analysis and performance evaluation of Basiri distribution network with and without DG integration was carried out. A detail modeling of the network was carried out in Matlab environment as well as the codes for the Genetic Algorithm (GA). The performance analysis was conducted using the voltage level at various bus bars as an index. Different scenarios were considered and the simulations were carried out based on the integration of different capacities of DG located manually and optimally. The s...

This research focuses on the optimization of power loss on Nigerian 330kV, 30-bus transmission li... more This research focuses on the optimization of power loss on Nigerian 330kV, 30-bus transmission line by installing high power electronics called FACTS device to improve the key parameters (line impedance, phase angle and voltage magnitude) and also increase the stability of the system. This was achieved through the use of Genetic Algorithm (GA) as it helps in finding an optimal location for the FACTS device. The load flow analysis for the 30bus transmission line was gotten through the use of power flow toolbox (PFATB). After optimization, it was observed that there was an improvement in the voltage profile(VPII) and also the line loss improvement index(LLII) which showed that the FACTS device used with genetic algorithm has helped to reduce the value of the losses from -13.85MVAR to -13.766MVAR. The simulation results demonstrate the performance of the system for each of the FACTS devices in improving the power profile and thereby voltage stability of the same. KeywordsFACTS, real an...

2017 International Joint Conference on Neural Networks (IJCNN), 2017

In this paper, recurrent neural networks (RNNs) are used in combination with phasor measurement u... more In this paper, recurrent neural networks (RNNs) are used in combination with phasor measurement units (PMUs) to predict the critical clearing time of a multi-machine power system in real-time. RNNs make use of real-time data from Phasor Measurement Unit (PMU). Simulation results are presented to show the effectiveness of the proposed approach in predicting the critical clearing time.

DEPARTMENT OF ELECTRICAL ENGINEERING UNIVERSITY OF CAPE TOWN CAPE TOWN Let me first and foremost ... more DEPARTMENT OF ELECTRICAL ENGINEERING UNIVERSITY OF CAPE TOWN CAPE TOWN Let me first and foremost thank God for His protection and inspiration throughout the course of this research. He is indeed the source of my strength and wisdom. He owns everything in my life. May His name be praised forever amen. I also want to express my heartfelt thanks to my wife and children for their prayers, support and encouragement. I will never forget the role of mother, friend, companion, helper my wife played throughout the course of the research. Special thanks to my main supervisor Prof Komla Folly for his words of encouragement and his supervisory role. His encouraging words helped a great deal to keep me motivated and challenged me when the need arose throughout my research. I would like to express my appreciation to Prof Kumar Venayagamoorthy of Missouri Science and Technology, USA for his advice. My stay in the Missouri Science and Technology Institute in the USA under his leadership was very productive and inspiring. His encouragement and diligence challenged me to always aspire to perform to my full professional ability. My mother (Mrs Theresa Olulope), without whom I would not have been here. I appreciate every bit of the training giving to me at every stage of my life. My extended family, in-laws and all my colleagues in my working place; you are all appreciated for your supports and encouragements. My friends and research colleagues in the Intelligent and Power Group played the roles of team mates that will not be easily forgotten. To my intimate twins brother (Taiwo Olulope), your assistance in putting many things in order at home is highly appreciated. My sincere and heartfelt gratitude goes to my co-pastors (Pastor C.E Okafor, Bro Ilesanmi Oluwafemi), Christian brothers in ministry as well as the entire Redeemed Christian Fellowship, UCT, Redeemed Christian Church of God, Latter House Parish, Cape Town, The Living Spring Revival and Truth Ministry Ire Ekiti, My parish pastor

This paper presented an optimal sizing technique for an off-grid hybrid system consisting of Smal... more This paper presented an optimal sizing technique for an off-grid hybrid system consisting of Small Hydro (SHP) system, Photovoltaic (PV) modules, Battery (BATT) banks and Diesel Generator (DG). The objective cost function (Annualized Cost System) and the Loss of Power Supply Probability (LPSP) were minimized with application of Genetic Algorithm (GA) in order to reduce the Cost of Energy (COE) generation. GA compared to other convectional optimization methods has the ability to attain global optimum easily. The decision variables are the number of small hydro turbines, NSHP, number of solar panels, NPV, number of battery banks, NBATT and the capacity of DG, PDG. The proposed method was applied to a typical rural village, Itapaji-Ekiti in Nigeria. The monthly average solar irradiance data were converted into hourly solar irradiance data for uniformity. Sensitivity analysis was also performed to identify the most important parameter influencing the optimized hybrid system. The optimal...

International Journal of Research, 2018

This paper examines the power quality of Ado-Ekiti metropolis in Ekiti State, Nigeria. The metric... more This paper examines the power quality of Ado-Ekiti metropolis in Ekiti State, Nigeria. The metrics of power quality includes: disturbances such as interruptions, voltage sags, spikes and momentary losses, power harmonics, and voltage unbalances with intrinsic effects on the efficiency and performances on the electric equipment. The necessity for this paper is the fluctuations of voltage supplied to the consumers by the distribution company in Ekiti State. These have significant effects on the power delivered to consumers ‘appliances, quality of their lives and the development of the society at large. The quality of voltage of each consumer in the selected areas were measured with the aid of digital multimeter which was compared with the standard nominal voltage of 240V, voltage deviations were evaluated through the use of standard mathematical equation and linear regression model was employed on the calculated voltage deviation with day and time used as inputs and the voltage deviat...

The continuous research in the area of renewable energy technology to substitute the unsustainabl... more The continuous research in the area of renewable energy technology to substitute the unsustainable nature of fossil fuel in terms of it future availability and negative environmental impact created by fossil fuel has ensure the explore of solar energy as a good alternative. Dye sensitized solar cells (DSSCs) serve to be a good alternative means of producing photovoltaic solar cell. This work reports the working principle and construction process of dye-sensitized solar cell. A synthesized dye (Ruthenium oxide) and an iodide electrolyte were used for better performance based on already researched work. Also, this work reports the evaluation process with results recorded by the produced solar cell within 6:00am (GMT) and 6:00pm (GMT) for selected days. The results from the evaluation process show a better performance of a dye-sensitized solar cell in low and normal sunny day. The solar cell has a good performance at 12:00noon with a 0.5V output.