This paper proposes a resource evaluation and validation study of a grid-connected hybrid power s... more This paper proposes a resource evaluation and validation study of a grid-connected hybrid power system whichtends to maximize the use of renewable energy generation with energy storage systems while minimizing thetotal system cost. The HOMER (Hybrid Optimization of Multiple Energy Resources) Grid software is adoptedin this study to find the optimal configuration of solar energy sources with battery storage systems to delivercomplementary electricity supply to satisfy AC primary load of 68.55 kWh/day with a 10.2 kW peak loaddemand to a building on a University campus premises located in the Niger Delta region of Nigeria. The resultsobtained from simulations showed a list of feasible resource configurations for the hybrid system. However,the most optimal/economical configuration is a grid-connected Solar PV-Gasoline system with a least cost ofenergy (COE) at ₦93.83/kWh and 6.7% renewable energy fraction.
The energy sector is undergoing a paradigm shift among all the stages, from generation to the con... more The energy sector is undergoing a paradigm shift among all the stages, from generation to the consumer end. The affordable, flexible, secure supply–demand balance due to an increase in renewable energy sources (RESs) penetration, technological advancements in monitoring and control, and the active nature of distribution system components have led to the development of microgrid (MG) energy systems. The intermittency and uncertainty of RES, as well as the controllable nature of MG components such as different types of energy generation sources, energy storage systems, electric vehicles, heating, and cooling systems are required to deploy efficient energy management systems (EMSs). Multi-agent systems (MASs) and model predictive control (MPC) approaches have been widely used in recent studies and have characteristics that address most of the EMS challenges. The advantages of these methods are due to the independent characteristics and nature of MAS, the predictive nature of MPC, and t...
The incandescent and fluorescent lighting systems which have been the most prominent electrical l... more The incandescent and fluorescent lighting systems which have been the most prominent electrical lighting choice for over 150 years are gradually being replaced in most homes with Light Emitting Diode (LED) Lighting Systems. This is due to their relatively low power consumption and good luminous intensity. LED lighting systems have revolutionized energy – efficient lighting. The significant feature of LEDs is that the light is directional with very low lagging power factor (0.2 – 0.6) as opposed to incandescent bulbs which spread the light more spherically with high power factor almost approaching unity. New LED designs address the directional limitation by using diffuser lenses and reflectors to disperse the light more. Since LED lighting represents a green technology, the issue of high power factor becomes very important. Power factor, defined as the ratio of real power consumed by a load (expressed in Watts) to apparent power (expressed in Volt-amperes), is a figure that ranges fr...
A potential solution to adequate and sustainable electricity supply problems in most developing c... more A potential solution to adequate and sustainable electricity supply problems in most developing countries is dependent on proper harnessing of solar (radiant) energy. Owing to the over dependence on fossil-fuel based energy, there is an exponential rise in carbon dioxide (CO2) emissions into the atmosphere, thereby causing severe environmental degradation and ozone layer depletion. This paper seeks to apply the readily available radiant energy source to solar water heating, and establish possible economic benefits to its use in domestic applications for residents of Covenant University campus. The microcontroller-based active solar water heating system (ASWHS) is designed to effectively absorb radiant energy using solar collectors, and store it as hot water in a water tank via a direct current (DC) circulation pump powered by a stand-alone photovoltaic (PV) system. The design also incorporates an auxiliary electric heater which is put to use only when there is insufficient radiant e...
Abstract-- In the industry today, continuous attempts to realize optimal efficiency and increased... more Abstract-- In the industry today, continuous attempts to realize optimal efficiency and increased productivity have spawned much progress in the use of intelligent automated devices and machines to perform various operations and tasks. The thrust of this work is to present the development of a three-degree-of-freedom revolute robot manipulator amenable to pick-and-place operations in the industry. Appropriate kinematic equations of the manipulator are obtained, and then used to develop algorithms for locating predetermined positions of a small object in a customized workspace. An Arduino-based controller circuit is built to implement the algorithms, and servomotors are used to carry out independent joint control of the manipulator. The positions of the object are identified with the aid of light-dependent resistors (LDR). Besides, in order to aid easy fabrication of links and overall system assembly, a 3D model of the manipulator is designed. The results of the work, showing effecti...
The incandescent and fluorescent lighting systems which have been the most prominent electrical
l... more The incandescent and fluorescent lighting systems which have been the most prominent electrical lighting choice for over 150 years are gradually being replaced in most homes with Light Emitting Diode (LED) Lighting Systems. This is due to their relatively low power consumption and good luminous intensity. LED lighting systems have revolutionized energy – efficient lighting. The significant feature of LEDs is that the light is directional with very low lagging power factor (0.2 – 0.6) as opposed to incandescent bulbs which spread the light more spherically with high power factor almost approaching unity. New LED designs address the directional limitation by using diffuser lenses and reflectors to disperse the light more. Since LED lighting represents a green technology, the issue of high power factor becomes very important. Power factor, defined as the ratio of real power consumed by a load (expressed in Watts) to apparent power (expressed in Volt-amperes), is a figure that ranges from zero to unity, it indicates the degree of distortion and phase shift in the current waveform. The work reported here proposes LED lighting system equipped with power factor correction driving circuit fed with dc – dc converter circuit. The power factor correction function is achieved by using switching converters circuit that operate directly from a full-wave rectified DC bus on a passive valley fill (PVF) circuit operating in Discontinuous Inductor Current Mode (DICM) for Power Factor Correction (PFC). This converter is simple to control, easy to construct and attractive for low cost application for domestic lighting. The results obtained have shown a LED lighting system with a lagging power factor of 0.85 that is energy – efficient compared to its conventional counterpart in domestic lighting applications.
A distribution grid is generally characterized by a high R/X (resistance/reactance) ratio and it ... more A distribution grid is generally characterized by a high R/X (resistance/reactance) ratio and it is radial in nature. By design, a distribution grid system is not an active network, and it is normally designed in such a way that power flows from transmission system via distribution system to consumers. But in a situation when wind turbines are connected to the distribution grid, the power source will change from one source to two sources, in this case, network is said to be active. This may probably have an impact on the distribution grid to whenever the wind turbine is connected. The best way to know the impact of wind turbine on the distribution grid in question is by carrying out load flow analysis on that system with and without the connection of wind turbines. Two major fundamental calculations: the steady-state voltage variation at the PCC (point of common coupling) and the calculation of short-circuit power of the grid system at the POC (point of connection) are necessary before carrying out the load flow study on the distribution grid. This paper, therefore, considers these pre-load flow calculations that are necessary before carrying out load flow study on the test distribution grid. These calculations are carried out on a test distribution system.
Remote data access and machine to machine communication are some of the value added services made... more Remote data access and machine to machine communication are some of the value added services made possible by the GSM communication technology. With this service, automated access to records, information and updates can be achieved by the use of the GSM short message system (SMS) queries. This work presents the development of a remote access platform for remote access to a database. The system utilizes the GSM-SMS technology and an interactive voice recorder system to access data. The database contains students result, financial status and information on the number of exeats taken. This data is accessed by calling dedicated phone number and following the voice prompt voice prompt, the user is able to access the desired information from the database. Once the required data is accessed, the GSM module transmits this query result back to the caller in SMS format. The system provides a cost effective channel for accessing data from remote databases.
This paper proposes a resource evaluation and validation study of a grid-connected hybrid power s... more This paper proposes a resource evaluation and validation study of a grid-connected hybrid power system whichtends to maximize the use of renewable energy generation with energy storage systems while minimizing thetotal system cost. The HOMER (Hybrid Optimization of Multiple Energy Resources) Grid software is adoptedin this study to find the optimal configuration of solar energy sources with battery storage systems to delivercomplementary electricity supply to satisfy AC primary load of 68.55 kWh/day with a 10.2 kW peak loaddemand to a building on a University campus premises located in the Niger Delta region of Nigeria. The resultsobtained from simulations showed a list of feasible resource configurations for the hybrid system. However,the most optimal/economical configuration is a grid-connected Solar PV-Gasoline system with a least cost ofenergy (COE) at ₦93.83/kWh and 6.7% renewable energy fraction.
The energy sector is undergoing a paradigm shift among all the stages, from generation to the con... more The energy sector is undergoing a paradigm shift among all the stages, from generation to the consumer end. The affordable, flexible, secure supply–demand balance due to an increase in renewable energy sources (RESs) penetration, technological advancements in monitoring and control, and the active nature of distribution system components have led to the development of microgrid (MG) energy systems. The intermittency and uncertainty of RES, as well as the controllable nature of MG components such as different types of energy generation sources, energy storage systems, electric vehicles, heating, and cooling systems are required to deploy efficient energy management systems (EMSs). Multi-agent systems (MASs) and model predictive control (MPC) approaches have been widely used in recent studies and have characteristics that address most of the EMS challenges. The advantages of these methods are due to the independent characteristics and nature of MAS, the predictive nature of MPC, and t...
The incandescent and fluorescent lighting systems which have been the most prominent electrical l... more The incandescent and fluorescent lighting systems which have been the most prominent electrical lighting choice for over 150 years are gradually being replaced in most homes with Light Emitting Diode (LED) Lighting Systems. This is due to their relatively low power consumption and good luminous intensity. LED lighting systems have revolutionized energy – efficient lighting. The significant feature of LEDs is that the light is directional with very low lagging power factor (0.2 – 0.6) as opposed to incandescent bulbs which spread the light more spherically with high power factor almost approaching unity. New LED designs address the directional limitation by using diffuser lenses and reflectors to disperse the light more. Since LED lighting represents a green technology, the issue of high power factor becomes very important. Power factor, defined as the ratio of real power consumed by a load (expressed in Watts) to apparent power (expressed in Volt-amperes), is a figure that ranges fr...
A potential solution to adequate and sustainable electricity supply problems in most developing c... more A potential solution to adequate and sustainable electricity supply problems in most developing countries is dependent on proper harnessing of solar (radiant) energy. Owing to the over dependence on fossil-fuel based energy, there is an exponential rise in carbon dioxide (CO2) emissions into the atmosphere, thereby causing severe environmental degradation and ozone layer depletion. This paper seeks to apply the readily available radiant energy source to solar water heating, and establish possible economic benefits to its use in domestic applications for residents of Covenant University campus. The microcontroller-based active solar water heating system (ASWHS) is designed to effectively absorb radiant energy using solar collectors, and store it as hot water in a water tank via a direct current (DC) circulation pump powered by a stand-alone photovoltaic (PV) system. The design also incorporates an auxiliary electric heater which is put to use only when there is insufficient radiant e...
Abstract-- In the industry today, continuous attempts to realize optimal efficiency and increased... more Abstract-- In the industry today, continuous attempts to realize optimal efficiency and increased productivity have spawned much progress in the use of intelligent automated devices and machines to perform various operations and tasks. The thrust of this work is to present the development of a three-degree-of-freedom revolute robot manipulator amenable to pick-and-place operations in the industry. Appropriate kinematic equations of the manipulator are obtained, and then used to develop algorithms for locating predetermined positions of a small object in a customized workspace. An Arduino-based controller circuit is built to implement the algorithms, and servomotors are used to carry out independent joint control of the manipulator. The positions of the object are identified with the aid of light-dependent resistors (LDR). Besides, in order to aid easy fabrication of links and overall system assembly, a 3D model of the manipulator is designed. The results of the work, showing effecti...
The incandescent and fluorescent lighting systems which have been the most prominent electrical
l... more The incandescent and fluorescent lighting systems which have been the most prominent electrical lighting choice for over 150 years are gradually being replaced in most homes with Light Emitting Diode (LED) Lighting Systems. This is due to their relatively low power consumption and good luminous intensity. LED lighting systems have revolutionized energy – efficient lighting. The significant feature of LEDs is that the light is directional with very low lagging power factor (0.2 – 0.6) as opposed to incandescent bulbs which spread the light more spherically with high power factor almost approaching unity. New LED designs address the directional limitation by using diffuser lenses and reflectors to disperse the light more. Since LED lighting represents a green technology, the issue of high power factor becomes very important. Power factor, defined as the ratio of real power consumed by a load (expressed in Watts) to apparent power (expressed in Volt-amperes), is a figure that ranges from zero to unity, it indicates the degree of distortion and phase shift in the current waveform. The work reported here proposes LED lighting system equipped with power factor correction driving circuit fed with dc – dc converter circuit. The power factor correction function is achieved by using switching converters circuit that operate directly from a full-wave rectified DC bus on a passive valley fill (PVF) circuit operating in Discontinuous Inductor Current Mode (DICM) for Power Factor Correction (PFC). This converter is simple to control, easy to construct and attractive for low cost application for domestic lighting. The results obtained have shown a LED lighting system with a lagging power factor of 0.85 that is energy – efficient compared to its conventional counterpart in domestic lighting applications.
A distribution grid is generally characterized by a high R/X (resistance/reactance) ratio and it ... more A distribution grid is generally characterized by a high R/X (resistance/reactance) ratio and it is radial in nature. By design, a distribution grid system is not an active network, and it is normally designed in such a way that power flows from transmission system via distribution system to consumers. But in a situation when wind turbines are connected to the distribution grid, the power source will change from one source to two sources, in this case, network is said to be active. This may probably have an impact on the distribution grid to whenever the wind turbine is connected. The best way to know the impact of wind turbine on the distribution grid in question is by carrying out load flow analysis on that system with and without the connection of wind turbines. Two major fundamental calculations: the steady-state voltage variation at the PCC (point of common coupling) and the calculation of short-circuit power of the grid system at the POC (point of connection) are necessary before carrying out the load flow study on the distribution grid. This paper, therefore, considers these pre-load flow calculations that are necessary before carrying out load flow study on the test distribution grid. These calculations are carried out on a test distribution system.
Remote data access and machine to machine communication are some of the value added services made... more Remote data access and machine to machine communication are some of the value added services made possible by the GSM communication technology. With this service, automated access to records, information and updates can be achieved by the use of the GSM short message system (SMS) queries. This work presents the development of a remote access platform for remote access to a database. The system utilizes the GSM-SMS technology and an interactive voice recorder system to access data. The database contains students result, financial status and information on the number of exeats taken. This data is accessed by calling dedicated phone number and following the voice prompt voice prompt, the user is able to access the desired information from the database. Once the required data is accessed, the GSM module transmits this query result back to the caller in SMS format. The system provides a cost effective channel for accessing data from remote databases.
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Papers by Ishioma Odigwe
lighting choice for over 150 years are gradually being replaced in most homes with Light Emitting
Diode (LED) Lighting Systems. This is due to their relatively low power consumption and good
luminous intensity. LED lighting systems have revolutionized energy – efficient lighting. The
significant feature of LEDs is that the light is directional with very low lagging power factor (0.2 – 0.6)
as opposed to incandescent bulbs which spread the light more spherically with high power factor
almost approaching unity. New LED designs address the directional limitation by using diffuser lenses
and reflectors to disperse the light more. Since LED lighting represents a green technology, the issue of
high power factor becomes very important. Power factor, defined as the ratio of real power consumed
by a load (expressed in Watts) to apparent power (expressed in Volt-amperes), is a figure that ranges
from zero to unity, it indicates the degree of distortion and phase shift in the current waveform. The
work reported here proposes LED lighting system equipped with power factor correction driving circuit
fed with dc – dc converter circuit. The power factor correction function is achieved by using switching
converters circuit that operate directly from a full-wave rectified DC bus on a passive valley fill (PVF)
circuit operating in Discontinuous Inductor Current Mode (DICM) for Power Factor Correction (PFC).
This converter is simple to control, easy to construct and attractive for low cost application for
domestic lighting. The results obtained have shown a LED lighting system with a lagging power factor
of 0.85 that is energy – efficient compared to its conventional counterpart in domestic lighting
applications.
a distribution grid system is not an active network, and it is normally designed in such a way that power flows from transmission
system via distribution system to consumers. But in a situation when wind turbines are connected to the distribution grid, the power
source will change from one source to two sources, in this case, network is said to be active. This may probably have an impact on
the distribution grid to whenever the wind turbine is connected. The best way to know the impact of wind turbine on the distribution
grid in question is by carrying out load flow analysis on that system with and without the connection of wind turbines. Two major
fundamental calculations: the steady-state voltage variation at the PCC (point of common coupling) and the calculation of
short-circuit power of the grid system at the POC (point of connection) are necessary before carrying out the load flow study on the
distribution grid. This paper, therefore, considers these pre-load flow calculations that are necessary before carrying out load flow
study on the test distribution grid. These calculations are carried out on a test distribution system.
lighting choice for over 150 years are gradually being replaced in most homes with Light Emitting
Diode (LED) Lighting Systems. This is due to their relatively low power consumption and good
luminous intensity. LED lighting systems have revolutionized energy – efficient lighting. The
significant feature of LEDs is that the light is directional with very low lagging power factor (0.2 – 0.6)
as opposed to incandescent bulbs which spread the light more spherically with high power factor
almost approaching unity. New LED designs address the directional limitation by using diffuser lenses
and reflectors to disperse the light more. Since LED lighting represents a green technology, the issue of
high power factor becomes very important. Power factor, defined as the ratio of real power consumed
by a load (expressed in Watts) to apparent power (expressed in Volt-amperes), is a figure that ranges
from zero to unity, it indicates the degree of distortion and phase shift in the current waveform. The
work reported here proposes LED lighting system equipped with power factor correction driving circuit
fed with dc – dc converter circuit. The power factor correction function is achieved by using switching
converters circuit that operate directly from a full-wave rectified DC bus on a passive valley fill (PVF)
circuit operating in Discontinuous Inductor Current Mode (DICM) for Power Factor Correction (PFC).
This converter is simple to control, easy to construct and attractive for low cost application for
domestic lighting. The results obtained have shown a LED lighting system with a lagging power factor
of 0.85 that is energy – efficient compared to its conventional counterpart in domestic lighting
applications.
a distribution grid system is not an active network, and it is normally designed in such a way that power flows from transmission
system via distribution system to consumers. But in a situation when wind turbines are connected to the distribution grid, the power
source will change from one source to two sources, in this case, network is said to be active. This may probably have an impact on
the distribution grid to whenever the wind turbine is connected. The best way to know the impact of wind turbine on the distribution
grid in question is by carrying out load flow analysis on that system with and without the connection of wind turbines. Two major
fundamental calculations: the steady-state voltage variation at the PCC (point of common coupling) and the calculation of
short-circuit power of the grid system at the POC (point of connection) are necessary before carrying out the load flow study on the
distribution grid. This paper, therefore, considers these pre-load flow calculations that are necessary before carrying out load flow
study on the test distribution grid. These calculations are carried out on a test distribution system.