Browsing by Author "Muriithi, Christopher M."
Now showing items 61-80 of 85
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Protection of Terminal Distribution Transformers: A Case Study of Kenya Power
Muriuki, J.; Muriithi, Christopher M.; Ngoo, L.; Nyakoe, G. N. (IEEE, 2018)The paper presents and analyses the main causes of high failure rate of Terminal Distribution Transformers (TDTs) in Kenya. These transformers are the most susceptible to faults emanating from lightning strikes and associated ... -
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 ... -
A Review of Approaches to the Quantification of Operating Reserve requirements in Systems with Large Scale Wind Power Integration
Muriithi, Christopher M.; Wamukoya, Brian K.; Ngoko, Bonface (2018-05)The need to diversify power generation sources, increase security of supply, incorporate sustainability in energy sources and reducing fuel usage and emissions has significantly led to the integration of variable renewable ... -
Review of HVDC Circuit Breakers Topologies
Muriuki, J. K.; Muriithi, Christopher M.; Ngoo, L.; Nyakoe, G. (2017-05)Voltage Source Converter-High Voltage Direct Current (VSC-HVDC) is the most efficient and reliable method for electrical power transmission over long distances. The greatest challenge with VSC-HVDC system is that short-circuit ... -
A review of multi-objective methods for optimal location and capacity of distributed generations in modern power systems
Karanja, J. M.; Ngoo, L. M.; Muriithi, Christopher M. (2017)Penetration of distributed generation (DG) units in distribution system has increased rapidly stimulated by reduced network power loss, improved bus voltage profile and better power quality. Appropriate location and capacity ... -
Shore to ship power for Mombasa port possibilities and challenges
Karue, C. N.; Murage, D. K.; Muriithi, Christopher M. (2016)Control of air pollution from docked ships is one challenge that ports encounter in their effort to reduce operational environmental impact. Ship-to-shore power has been identified as one technology to reduce emissions by ... -
Short term voltage stability analysis of an aggregated industrial load
Obiri, L.K.; Kinyua, J. M.; Muriithi, Christopher M. (2010)Environmental constraints have limited expansion of transmission line networks. And with Power systems being operated close to their security limits, the likelihood of voltage collapses Occurring has increased [1]. In ... -
Single Axis Solar Tracking System
Mbura, C. M.; Muriithi, Christopher M.; Mwanza, S. K.; Nganga, B. K. (2021-11)This paper is about the design and development of a microcontroller based solar tracking system. Solar energy is rapidly becoming an alternative means of electrical source in Kenya and all over the world and the solar ... -
Strengthening The Transient Stability Of A Power Grid Coupled With Wind Turbine Using Thyristor Controlled Series Capacitor
Akpeke, N. E.; Muriithi, Christopher M.; Mwaniki, C. (2019-10)The increase diffusion and circulation of wind energy to the conventional power system due to rapid growth of energy demand has led to consideration of different wind turbine generator technologies. It has been discovered ... -
Suitability of aggregation methods of induction motor models for transient stability load modeling of Kenya power transmission and distribution system
Kinyua, J. M.; Muriithi, Christopher M. (2010)Current trend indicate that there has been increase on power outage frequency. This has partly been as a result of unstable power system with very small security margin of operation. Therefore, this paper focusses on the ... -
Suitability of aggregation methods of induction motor models for voltage stability analysis
Muriuki, J.K.; Muriithi, Christopher M.; Kinyua, D.M (2012)This paper focusses on the aggregation of multiple induction motors (IM) connected in parallel on the same bus into a single equivalent model using aggregation based on transformer equivalent circuit (method 1) and on ... -
A Systematic Review On The Impact Of Educational Robots In Teaching Secondary School STEM Related Subjects
Mwangi, P. M.; Muriithi, Christopher M.; Agufana, Peace B. (2021-11)Robots are interdisciplinary in nature. Research in Educational robotics in the education sector has grown tremendously. The robots have been used as teaching tools in STEM subjects. However, even though research interest ... -
Transient stability analysis of the kenyan power system with different wind generation technologies.
Orenge, S.R; Muriithi, Christopher M.; Nyakoe, G.N (2014)Electrical power generation from wind is achieved using a number of generator technologies. The main technologies are the Squirrel Cage Induction Generators (SCIG) and Doubly Fed Induction Generators (DFIGs). In this paper, ... -
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 ... -
Under Voltage Load Shedding using Hybrid Metaheuristic Algorithms for Voltage Stability Enhancement: A Review
Kisengeu, S. M.; Nyakoe, G. N.; Muriithi, Christopher M. (2020)Power blackouts are experienced globally, more so with increasing load demand and ageing infrastructure. The high failure rate of conventional and adaptive load shedding techniques is prevalent during multiple contingencies. ... -
The use of RC4 Encryption for Smart Meters
Kamau, Lincoln; Kibet, Philip; Muriithi, Christopher M. (2014)The electrical power grid is undergoing improvements and is being transformed to the Smart Grid. Smart Grid makes use of two way flow of power and information to better monitor, plan and control the electrical power grid. ... -
The use of RC4 Encryption to Provide Privacy for Smart Meters
Kamau, L.; Langat, K.; Muriithi, Christopher M. (2018)The electrical power grid is undergoing improvements and is being transformed to the Smart Grid. Smart Grid uses two-way power and information flow to better monitor, plan and control the electrical power grid. Advanced ... -
Voltage profile improvement using switched capacitors: case of single wire earth return distribution network
Nirere, M.S; Muriithi, Christopher M.; Wekesa, C. (2017)Most rural areas in Africa are characterized by scattered villages with a very low demand in electricity. Due to improper planning and lack of knowledge on low cost technologies, the cost of extending the grid to supply ... -
Voltage Stability Analysis and Improvement of Power System With Increased SCIG-based Wind System Integration
Adetokun, B. B.; Muriithi, Christopher M.; Ojo, J. O. (2020)This paper presents voltage stability analysis and improvement of power system when there is increase in wind power penetration. Loading parameter-Voltage curve was used to calculate the loadability and the megawatt margin ... -
Voltage stability analysis using CP_ANN and optimized capacitor bank placement
Muriithi, Christopher M.; Njoroge, S.N. (2010)Voltage Stability refers to the ability of power system to maintain steady voltage at all buses in the system after being subjected to a disturbance from a given initial operating condition. In this paper, the IEEE 30-bus ...