School of Engineering and Technology (JA)

Under Voltage Load Shedding on a Modified IEEE 14-Bus System Using Hybrid ABC-PSO Algorithm for Voltage Stability Enhancement

Kisengeu, S. M.; Nyakoe, G. N.; Muriithi, Christopher M. (Elsevier, 2021-08)

Voltage collapse tends to occur due to the voltage instability created during large faults. As a last resort, under-voltage load shedding (UVLS) is performed after all the available power operation and control mechanisms ...

Development of DSTATCOM Optimal Sizing and Location Technique Based on IA-GA for Power Loss Reduction and Voltage Profile Enhancement in an RDN

Kallon, M. A.; Nyakoe, G. N.; Muriithi, Christopher M. (IJEER Forex Press, 2022-01)

The efficiency of electrical distribution systems is being more affected by the increase in voltage drops and power losses. These issues of voltage drop and power loss can be significantly minimized by the incorporation ...

Application of large-scale grid-connected solar photovoltaic system for voltage stability improvement of weak national grids

Adetokun, B. B.; Ojo, J. O.; Muriithi, Christopher M. (Springer Nature Ltd, 2021-12)

This paper investigates the application of large-scale solar photovoltaic (SPV) system for voltage stability improvement of weak national grids. Large-scale SPV integration has been investigated on the Nigerian power system ...

Multiobjective optimal power flow for static voltage stability margin improvement

Kyomugisha, R.; Muriithi, Christopher M.; Edimu, M. (Elsevier, 2021-12)

Worldwide, utilities are aiming to increase the stability of modern power systems during system disturbances. Optimizing generation scheduling can improve system security in contingency and stressed conditions while lowering ...

Modeling and Energy Management Strategy in a Grid Connected Solar PV System

Apiyo, E.; Muriithi, Christopher M.; Ngoo, L. (Scientific & Academic Publishing, 2021-09)

Electric power is substantially an important resource in the modern world. With the increase in demand for electric energy, there is a need to search for alternative energy sources because conventional resources are being ...

Evaluation of Thermal Interface Materials in Mediating PV Cell Temperature Mismatch in PV-TEG Power Generation

Kidegho, G.; Njoka, F.; Muriithi, Christopher M.; Kinyua, R. (2021-03)

Among the emerging renewable energy technologies, solar photovoltaic (PV) power generation is growing steadily in the mainstream energy supply mix contributing about 2.58% of the global total power generation by 2018 from ...

Application and control of flexible alternating current transmission system devices for voltage stability enhancement of renewable-integrated power grid: A comprehensive review

Adetokun, B. B.; Muriithi, Christopher M. (Elsevier, 2021-03)

This paper presents a comprehensive review on the application and control of Flexible Alternating Current Transmission Systems (FACTS) devices in order to improve voltage stability of power grid with high share of renewable ...

Impact of integrating large-scale DFIG-based wind energy conversion system on the voltage stability of weak national grids: A case study of the Nigerian power grid

Adetokun, B. B.; Muriithi, Christopher M. (Elsevier, 2021-11)

This paper investigates the impact of integrating large-scale Doubly-Fed Induction Generator (DFIG)-based wind energy conversion system (WECS) on the voltage stability of the 52-bus, 330 kV Nigerian power grid. Indices ...

Innovative Solar Photovoltaic and Thermoelectric Power Generator for a Recirculating Aquaculture System

Kidegho, G.; Kinyua, R.; Muriithi, Christopher M.; Njoka, F. (2020-09)

Solar Photovoltaic power generation is fast gaining popularity in Kenya. However, the effects of high cell temperatures continue to be a major hindrance to their efficiency especially for standalone systems. Water can be ...

Reactive Power-Voltage-Based Voltage Instability Sensitivity Indices for Power Grid With Increasing Renewable Energy Penetration

Adetokun, B. B.; Ojo, J. O.; Muriithi, Christopher M. (2020-05)

In this work, a reactive power-voltage (QV)-based framework to evaluate the voltage instability sensitivities of power system buses to increase in renewable energy (RE) penetration has been developed using two sensitivity ...

An Adaptive Neuro-Fuzzy Inference System for Detection and Correction of Illegal Power Connection in Kenya

Karobia, Pauline N.; Ngoo, L.; Muriuki, J. (Energy and Power, 2021)

In this research, an adaptive method for illegal power connection detection and correction in domestic distribution is presented. The focus is on a domestic supply at the meter box. Illegal power connection has been a ...

Embedded Power System Monitoring Of Illegal Power Connections In Kenyan Domestic Supply

Karobia, Pauline N.; Ngoo, L.; Muriuki, J. (2020 IEEE PES/IAS Power Africa, 2020)

Globally Technical Losses (TLs) and Non- Technical Losses (NTLs) are a significant challenge for power distribution systems. Mostly NTLs is caused by illegal power connection which can be as much as half of all the ...

Effect of the Graphite Dispersed Titanium Dioxide Solid Solar Cell Composition on the Generated Potential (VOC)

Kimemia, David N.; Njoroge, K. W.; Mwangi, W. I. (2020-09)

Energy is globally recognized as one of the most fundamental inputs for social and economic development. Most energy sources are serious environmental pollutants. To overcome this challenge, presence of abundant sunshine ...

Effect of Varying Titanium Dioxide and Iodine on Open Circuit Voltage and Short Current Density

Kimemia, David N.; Njoroge, W. K.; Mwangi, I. W. (2018)

The study sought to establish a photo cell which can reduce use of fossil fuels and in turn reduce on air pollution and climate change. The experimental design involved preparation of various ratios of titanium dioxide: ...

Bandwidth Allocation Algorithm With User Mobility Dynamics In FEMTOCELL Network

Oyie, Nicholas O.; Langat, P. K.; Musyoki, S. (Acta Press, 2014)

Fourth generation cellular networks provide ubiquitous broadband access to a growing number of mobile users worldwide. In this context, resource allocation in orthogonal frequency division multiple access femtocell network ...

Spatiotemporal Statistical Channel Model for Indoor Corridor at 14 GHz, 18 GHz, and 22 GHz Bands

Oyie, Nicholas O.; Afullo, T. J. O. (Wiley, 2018-12)

Several techniques have been proposed to overcome challenges of meeting demands for higher data rates in wireless communication. Space-time diversity method is proposed to exploit spatiotemporal nature of the channel; ...

Performance Study of Path Loss Models at 14, 18, and 22 GHz in an Indoor Corridor Environment for Wireless Communications

Elmezughi, M.; Oyie, Nicholas O. (2021-03)

The critical rule to achieve extremely high peaks of data transmission is the availability of a tremendous amount of bandwidth. The super high frequency (SHF) and the millimeter-wave (mmWave) frequency bands are the ...