• Factors for Efficient Relationship between Contractors and Subcontractors in Project Implementation in Nairobi Kenya 

  Biketi, Felix Quentin; Kivaa, Titus; Munala, Gerryshom (The IJES, 2017)

  Construction is a complex and challenging activity owing to the technical advances, tighter regulations and need for effective management of resources for competitive edge. The projects under the industry involve many ...
• Investigation on Optimal Cutting Parameters in Turning AISI 8660 Steel Using Silicon (Sic) Whisker Reinforced Ceramic Tool 

  Wathigo, James Mwangi; Keraita, J.N.; Byiringiro, Jean B.; Muguthu, J.N. (IOSR Journals, 2017-08)

  This research was to investigate the effects of process parameter that is cutting speed, feed rate, depth of cut and machining time on the response variables in turning AISI 8660 material using whisker reinforced ceramic ...
• 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 ...
• Development of a Wavelet-ANFIS based fault location system for underground power cables 

  Zawaira, H.S.; Nyakoe, G.N.; Muriithi, Christopher M. (2017)

  In the past decade, electricity demand has increased rapidly in metropolitan areas. All over the world, large scale underground power cable installations networks are replacing overhead transmission lines due to environmental ...
• Assessment of VSC-HVDC system for transient stability improvement of a power system with large wind power injection. 

  Muriuki, J.K.; Muriithi, Christopher M.; Ngoo, L.; Nyakoe, G.N. (2016)

  This paper analyzes Power System Transient Stability Improvement through a Voltage Source Converter High Voltage Direct Current (VSC-HVDC) system with Large Wind power injection. The modern large wind farms and other ...
• 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 ...
• 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 ...
• Power output maximization of a PMSG based standalone wind energy conversion system using fuzzy logic 

  Ndirangu, J.G; Nderu, J.N; Maina, C.M.; Muhia, A.M (2016)

  This paper proposes a Fuzzy Logic Controller for Maximum Power Point Tracking of a case study wind energy conversion system (WECS).The system consists of a standalone fixed pitch, variable speed wind turbine directly coupled ...
• 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 ...
• 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 ...
• Modelling and loading limits for kenya coast power network using continuation power flow 

  Karue, C.N; Murage, D.K; Muriithi, Christopher M. (2016)

  Shore to ship power connection for docked ship has recently been applied as one way of limiting pollution in ports. This paper studies the effect that a shore to ship connection at the port of Mombasa would have on the ...
• 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 ...
• 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) ...
• 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 ...
• 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, ...
• Dynamic voltage stability analysis of the kenya power system using decision trees 

  Njoroge, S.N; Muriithi, Christopher M.; Ngoo, L.M (2014)

  Dynamic Voltage stability analysis of any system is studied by considering load changes within the system and how voltage magnitudes at the load buses within the system are affected by the load changes. The analysis can ...
• Dynamic voltage stability analysis of the kenya power system using vcpi stability index and artificial neural networks 

  Njoroge, S.N.; Muriithi, Christopher M.; Ngoo, L.M. (2014)

  Dynamic voltage stability deals with the voltage levels and how they’re affected by either faults or load changes within the system. Voltage instability has long been suspected in the voltage collapse and islanding of power ...
• Comparison of aggregation of small and large induction motors for power system stability study 

  Muriuki, J.K; Muriithi, Christopher M. (2013)

  Aggregation of different sizes of induction motors (IM) connected to a power system has diverse Precision on the identification of the aggregate model parameters. Earlier work on the aggregation accuracy of various motors ...
• 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 neuro fuzzy model of an induction motor for voltage stability analysis using continuation load flow 

  Ngoo, L.M.; Muriithi, Christopher M.; Nyakoe, G.N; Njoroge, S.N (2011)

  This paper uses the concept of the continuation power flow analysis used in voltage stability analysis.It uses the continuation load flow to plot the PV (pressure-volume) curves of an induction motor load. A neuro-fuzzy ...

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