Browsing Doctoral Degrees (Electrical Engineering) by Issue Date
Now showing items 1-20 of 32
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Real-time interactive multiprogramming.
(1978)This thesis describes a new method of constructing a real-time interactive software system for a minicomputer to enable the interactive facilities to be extended and improved in a multitasking environment which supports ... -
The lightning ground flash : an engineering study.
(1979)The thesis is concerned with a study of the electrical engineering parameters of the lightning ground flash - i.e. the statistical distributions of peak current amplitudes, discharge current waveform characteristics, and ... -
Modelling and analysis of turbogenerators in single machine and multi- machine subsynchronous resonance studies.
(1987)Subsynchronous Resonance (SSR) is a condition which occurs when turbogenerators are connected to series capacitively compensated transmission systems and it can cause large scale damage to the turbogenerators. The ... -
Numerical alogrithms for PWM modulators.
(1989)The development of a simple efficient Pulse Width Modulation (PWM) modulator has been a goal for many research workers. In general three techniques have been used, namely; the analogue triangular wave technique; the use ... -
Quantitative feedback design and construction of a two by two system with large disturbances.
(1989)The quantitative feedback theory (QFT) of Horowitz is theoretically well developed for multivariable systems but there is not sufficient knowledge on its application to practical problems. A "flying machine" consisting ... -
A gridless, variable perveance Pierce electron gun.
(1994)This thesis covers the design and development of a modulated Pierce electron gun used in the construction of experimental travelling wave tube (TWT) amplifiers. The gun incorporated an open aperture switching electrode, ... -
The Coriolis effect and travelling waves in porous media convection subject to rotation.
(2000)This study intends to recover and expand the analytical work of Vadasz (1998) for linear and weak non-linear stability of a rotating porous media heated form below and subject to gravity and Conolis forces. It is shown ... -
Performance analysis of cellular networks.
(2000)Performance analysis in cellular networks is the determination of customer orientated grade-of-service parameters, such as call blocking and dropping probabilities, using the methods of stochastic theory. This stochastic ... -
Compound codes based on irregular graphs and their iterative decoding.
(2004)Low-density parity-check (LDPC) codes form a Shannon limit approaching class of linear block codes. With iterative decoding based on their Tanner graphs, they can achieve outstanding performance. Since their rediscovery ... -
Modelling and analysis of inverter-based facts devices for power system dynamic studies.
(2006)Flexible AC Transmission Systems (FACTS) involves the incorporation of power-electronic controlled devices into ac power transmission systems in order to extend the power-transfer capability of these systems beyond their ... -
An investigation of the influence of silver doping on the intergranular 'weak-link' properties of the superconducting system Y1Ba2Cu307-x.
(2006)High-temperature superconducting materials have found considerable technological application and still have a largely unrealised potential. The key to unlocking this potential depends on a better understanding of their ... -
Design synthesis of LCC HVDC control systems.
(2011)From the early days of HVDC system applications, the importance of mathematical modelling of the dynamics of Line Commutated Converter (LCC) HVDC systems has been appreciated. There are essentially two methodologies used ... -
Analysis of the impact of a facts-based power flow controller on subsynchronous resonance.
(2012)Electric power utilities are faced with the challenge of meeting increasing demand for electric power whilst many factors prevent traditional remedies such as the expansion of transmission networks and the construction of ... -
DC coronation electroporation.
(2015)Cells are surrounded by a semi-permeable bilayer lipid membrane that acts as a barrier against the entry of foreign molecules. In the fields of molecular biology, biotechnology, and medicine, the ability to breach the cell ... -
Modelling physical asset risk profile using systems thinking augmented by stochastic and probabilistic inferences.
(2015)Current quantitative approaches to power asset management risk modelling have focused on financial aspects such as net present value. These approaches can neither determine nor trend the impact of technologies or renewal ... -
Optimal energy control of a grid connected solar-wind based electric power plant.
(2016)In the present context of urge energy demand, renewable energy is considered as an alternative source of clean energy. In view of the increase in the price of fossil fuel due to its rarity and emissions, more integration ... -
Impact of three-dimensional photovoltaic structure on solar power generation.
(2016)Abstract available in PDF file. -
Survey and assessment of the impact of embedded generation on the eThekwini electricity distribution grid.
(2016)Under frequency load shedding, rising electricity tariffs, environmental concerns, reducing costs of renewable energy technology and delays in constructing new power stations has lead consumers and producers alike to explore ... -
PMSG-based wind power integration-modelling and analysis of impacts on the dynamic performances of a power system and mitigation under stochastic wind disturbances.
(2017)Because of the ever-growing demand for electrical energy and environmental challenges of fossil fuel consumption, a priority has been given to the development of wind energy systems, among which, currently, permanent magnet ... -
Development of neuro-fuzzy strategies for prediction and management of hybrid PV-PEMFC-battery systems.
(2017)Abstract available in PDF file.