Browsing Research Articles (Electrical Engineering) by Type "Peer reviewed journal article"

Now showing items 1-6 of 6

    • Application of maintenance tools and strategies in integrated risk management of critical physical assets. 

      Mkandawire, Burnet O'Brien.; Ijumba, Nelson Mutatina.; Whitehead, Howard. (Inderscience Publishers., 2011)
      This paper critically analyses various tools, techniques and strategies; and proposes an ‘integrated risk management model’ that utilises advantages of the best combination of tools, techniques and strategies to manage ...

    • Asset management optimization through integrated systems thinking and N-1 contingency capability for refurbishment. 

      Ijumba, Nelson Mutatina.; Whitehead, Howard.; Mkandawire, Burnet O'Brien. (Institute of Electrical and Electronics Engineers., 2011-09)
      This paper presents a systems view of refurbishment systems to evaluate root causes of suboptimal refurbishment. Case studies from ten selected South African and Malawian firms from largest electric power utilities, mining, ...

    • Modelling of broadband powerline communication channels. 

      Mulangu, Chrispin Tshikomba.; Afullo, Thomas Joachim Odhiambo.; Ijumba, Nelson Mutatina. (SAIEE Publications., 2011)
      This paper develops a new PLC model and investigates the impact of the load, line length, and diameter of the transmission line on the channel transfer function over the frequency range of 1-20 M Hz. The results show that ...

    • Quantitative Feedback Theory design of line current commutated HVDC control systems. 

      Chetty, Leon.; Ijumba, Nelson Mutatina. (SAIEE Publications., 2013)
      Line Current Commutated (LCC) HVDC systems consists of uncertain plants. These uncertainties are result of changes/disturbances in the ac networks or in the LCC HVDC system itself. Further uncertainties can be introduced ...

    • Rural electrification using overhead HVDC transmission lines. 

      Chetty, Leon.; Ijumba, Nelson Mutatina. (Energy Research Centre., 2012)
      One of mankind’s greatest modern challenges is poverty alleviation. The provision of electricity can greatly assist in this regard. The tapping of small amounts of power from an HVDC transmission line represents a solution ...

    • System identification of classic HVDC systems. 

      Chetty, Leon.; Ijumba, Nelson Mutatina. (SAIEE Publications., 2011)
      Determining models from observations and studying the models’ properties is essentially the functionality of science. Models attempt to link observations into some pattern. System identification is the art of building ...