Browsing Journal Articles (EN) by Author "Muriithi, Christopher M."
Now showing items 21-40 of 40
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Novel Modeling of a Fast DC Breaker for a VSC-HVDC Transmission System Protection
Muriuki, J.; Nyakoe, G.; Muriithi, Christopher M.; Ngoo, L (2017-11)The inability to quickly isolate the faulty sections of the direct current (DC) network damages the converters and the transmission system. Further delay in fault interruption can be escalated to the generation system thus ... -
Optimal Battery Sizing of a Grid-connected Residential Photovoltaic System for Cost Minimization using PSO Algorithm
Nibaruta, R.; Muriithi, Christopher M.; Ngoo, L (2019)This paper proposes a new optimization technique that uses Particle Swarm Optimization (PSO) in residential grid connected photovoltaic systems. The optimization technique targets the sizing of the battery storage system. ... -
Optimal location of TCSC and its use in congestion management
Muisyo, I.N; Kaberere, K.K; Muriithi, Christopher M. (2015)Over the last two decades, electricity demand has increased substantially while the expansion of generation and transmission network has been limited due to environmental and/or economic constraints of building new ... -
Optimal siting and sizing of single SPV system in radial distribution network for loss reduction based on maximum power saving technique
Madjissembaye, N.; Thiaw, L.; Muriithi, Christopher M.; Wekesa, C.W (2016)This paper presents the optimal placement of aSPV (Solar Photovoltaic) system in thedistribution system using the backward and forward sweep method based on the analytical maximum power saving technique for the maximum ... -
Optimal Switching Sequence using a Metaheuristic Algorithm for Feeder Reconfiguration
Juma, S. A.; Muriithi, Christopher M.; Ngoo, L. M. (International Research Publication House, 2018)Electrical energy is continuously lost due to resistance in the power system networks. Distribution system experience enormous power losses as compared to the rest of the network. Solutions that reduce distribution power ... -
Optimal under frequency load shedding using CUCKOO search wirh levy flight algorith for frequency stability improvement.
Mwaniki, C.; Muriithi, Christopher M.; Abungu, N.O.; Nyakoe, G.N. (2015)Frequency stability in a power system is very important as it determines the synchronous speed of electrical machines. Therefore it should remain within acceptable limits even when the system is disturbed. In order to ... -
Optimal under-voltage load shedding using cuckoo search with levy flight algorithm for voltage stability improvement
Mwaniki, C.; Muriithi, Christopher M.; Abungu, N.O.; Nyakoe, G.N (2015)Voltage stability has become a serious threat of modern power system operation nowadays. To tackle this problem properly, load shedding is a countermeasure taken as a last resort. However, its consequences might result in ... -
Placement of fact devices fo voltage profile improvement and loss reduction
Sutter, J.; Nderu, J.; Muriithi, Christopher M. (2015)Abstract— Flexible Alternating Current Transmission System (FACTS) devices are solid state converters that have the capability of controlling various electrical parameters such as reactance, power angle and ... -
Power system transient stability enhancement with application of SSSC and IPFC facts devices
Sutter, J.R; Nderu, J.N; Muriithi, Christopher M. (2015)The complexity due to massive growth of power systems has to increased demand of electrical energy giving rise to numerous stability challenges. In these situations, Flexible Alternating Current Transmission System (FACTS) ... -
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 ... -
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 ... -
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 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 ... -
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 ... -
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 assessment and enhancement of power grid with increasing wind energy penetration
Adetokun, B. B.; Muriithi, Christopher M.; Ojo, J. O. (Elsevier, 2020-03)This paper presents the voltage stability assessment of power system with increasing wind energy penetration. The effects of increasing Doubly-Fed Induction Generator-based Wind Energy Conversion System (DFIG-WECS) penetration ... -
Voltage stability improvement on optimal placement of facts devices
Mutegi, A.M; Kihato, Peter K.; Muriithi, Christopher M.; Saulo, M.J. (2016)Voltage stability challenge in power systems remains one of the major concerns in system planning and operation. The ability of a power system to maintain acceptable voltage levels at all buses in the system under normal ... -
Wider range of tuning the proposed VSC-HVDC system for improved controller performance
Muriuki, J.; Muriithi, Christopher M.; Ngoo, L.; Nyakoe, G.N. (2016)Tuning of the Voltage Source Converters, High Voltage Direct Current (VSC-HVDC) controllers is a critical undertaking continuously carried out in power system operation to ensure system stability is kept under control ...