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Browsing Electrical, Electronic and Computer Engineering by Author "Gitau, Michael Njoroge"
Now showing items 1-14 of 14
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Musasa, K.; Gitau, Michael Njoroge; Bansal, Ramesh C. (Taylor and Francis, 2015-06)The conventional collection grids for offshore wind farm consist of internal AC link comprising of series-parallel connections of identical wind energy conversion units (WECUs). Each WECU includes a 60- or 50-Hz power ...
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Grobler, Inus; Gitau, Michael Njoroge (Institution of Engineering and Technology, 2017-07)Effects of polymer heatsink materials on electromagnetic interference (EMI) noise in converters have not been adequately investigated. Heatsinks provide a path to ground for the common-mode (CM) noise. Selecting an appropriate ...
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Ngwenyama, M.K.; Gitau, Michael Njoroge (Nature Research, 2024-01)This work examines the application of machine learning (ML) algorithms to evaluate dissolved gas analysis (DGA) data to quickly identify incipient faults in oil-immersed transformers (OITs). Transformers are pivotal equipment ...
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Musasa, K.; Gitau, Michael Njoroge; Bansal, Ramesh C. (Institution of Engineering and Technology, 2015-08)This paper investigates the dynamic performance of an active rectifier integrated into a wind park. The small changes in the DC current and the DC voltage are examined. The small variations are caused by the miniature ...
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Muchina, Eliud G.; Masike, Lebogang; Gitau, Michael Njoroge (Institution of Engineering and Technology, 2019-08)Supply and demand mismatches in renewable energy systems are addressed by integrating battery banks. Selecting battery bank terminal voltage to match DC-bus voltage (350–450 V for single-phase AC loads), necessitates ...
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Mohammed, Inas Mohammed Osman; Gitau, Michael Njoroge; Bansal, Ramesh C.; Musasa, Kabeya (Springer, 2019-01)An improved topology with a fault ride through (FRT) capability when subjected to a DC-link fault-based wind power plant (WPP) employing a Vienna active rectifier-I is proposed in this paper. The proposed system is capable ...
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Grobler, Inus; Gitau, Michael Njoroge (Institution of Engineering and Technology, 2017-07)Conducted electromagnetic compatibility (EMC) noise qualification tests are normally carried out after a prototype has been designed, built and tested and the process is repeated in the event of non-compliance. The ability ...
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Masike, Lebogang; Gitau, Michael Njoroge (MDPI, 2023-02)The continued commissioning of DC microgrids in an effort to achieve net-zero carbon levels in the atmosphere demands the large-scale deployment of converters to make the power from renewable energy sources, such as solar ...
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Hamatwi, Ester; Davidson, Innocent E.; Gitau, Michael Njoroge (Hindawi Publishing Corporation, 2017-05-28)Due to the intermittent nature of wind, the wind power output tends to be inconsistent, and hence maximum power point tracking (MPPT) is usually employed to optimize the power extracted from the wind resource at a wide ...
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Mbukani, Mwana Wa Kalaga; Gitau, Michael Njoroge; Naidoo, Raj (MDPI, 2023-03-10)A sliding mode control-based model reference adaptive system (SMC-MRAS) estimator for sensor-less control of doubly fed induction generator (DFIG) systems in wind turbine applications is proposed in this paper. The ...
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Ibrahim, Hanif Auwal; Ayomoh, Michael; Bansal, Ramesh C.; Gitau, Michael Njoroge; Yadavalli, Venkata S. Sarma; Naidoo, Raj (Elsevier, 2023-05)With affordable and clean energy being one of the Sustainable Development Goals (SDG7), most developing economies are still caught up with the dilemma of inadequate power supply and heavy dependence on fossil fuel. This ...
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Gitau, Michael Njoroge; Masike, Lebogang; Adams, Grain P. (MDPI, 2023-04-11)There is always a need to analyze current signals generated by various DC–DC converters. For example, to determine the current stress experienced by semiconductor devices and to evaluate active and reactive power consumption ...
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Gitau, Michael Njoroge; Adam, Grain P.; Masike, Lebogang; Mbukani, Mwana Wa Kalaga (Institute of Electrical and Electronics Engineers, 2021-09)Transformational techniques unifying synthesis of two-state DC-DC converters and analytical synthesis techniques allowing generation of all possible converters meeting a certain criteria already exist. The analysis of a ...
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Masike, Lebogang; Gitau, Michael Njoroge; Adam, Grain P. (MDPI, 2022-07-27)The inherent non-linear behavior of switch-mode power supplies complicates the task of computing their linear models, which are essential for a model-oriented control design of DC–DC converters. In a model-oriented control ...
Now showing items 1-14 of 14