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 ...
Devolution is generally defined as a process of transfer of political, administrative and fiscal management powers between central government and lower levels of government, primarily operating at city and region levels ...
Kenya’s Vision 2030 recognizes the enabling role of Information and Communication Technology (ICT) and anchors some of its key aspirations upon the availability and adoption of computers for schools. The overall objective ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
Mutegi, A.M; Kihato, P.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 ...
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) ...
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 ...
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, ...
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 ...
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 ...
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 ...
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 ...