Doctoral Degrees (Electrical and Electronic Engineering)
Recent Submissions
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Critical Evaluation of slip synchronous wind generator technology
(Stellenbosch : Stellenbosch University, 2022-12)ENGLISH ABSTRACT: Historically, the strength and stability of an electrical power grid depended on the number of synchronous generators (SGs) connected to that grid. However, as traditional SG-based electrical power ... -
Characterizing variable renewable energy generation uncertainty towards improved forecasting and operational decision making
(Stellenbosch : Stellenbosch University, 2022-12)ENGLISH ABSTRACT: As its first novel contribution, this dissertation investigates the broad challenge of understanding the impacts of integrating a high share of variable renewable energy (VRE) generators into power systems. ... -
Scaling multi-agent reinforcement learning to eleven aside simulated robot soccer
(Stellenbosch : Stellenbosch University, 2022-12)ENGLISH ABSTRACT: Robot soccer, where teams of autonomous agents compete against each other, has long been regarded as a grand challenge in arti cial intelligence. Despite recent successes of learned policies over ... -
Yield analysis optimization of microwave devices; antennas using non-linear partial-least-squares; polynomial chaos expansion
(Stellenbosch : Stellenbosch University, 2022-12-01)ENGLISH ABSTRACT: Polynomial Chaos Expansion (PCE is introduced as an alternative to classical sensitivity analysis techniques, such as Monte Carlo analysis, for electromagnetic applications. After a su ciently accurate ... -
Design and critical evaluation of permanent magnet wind generator technology for small-scale wind energy systems
(Stellenbosch : Stellenbosch University, 2022-12)ENGLISH ABSTRACT: Small-scale wind energy systems with energy storage offer a n a ttractive electrification solution for rural stand-alone applications in Sub-Saharan Africa where utility grid connection is too expensive. ... -
Technical document accessibility
(2022-12)ENGLISH ABSTRACT: Technologies such as text to speech and braille provide alternative representations of electronic text, allowing blind users to access most documents independently. However, non-textual graphical ... -
Geospatial capacity allocation framework of wind and solar renewable generation for optimal grid support
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: South Africa has displayed a unique energy supply profile over recent years, where the ability to consistently meet the energy demand has been constrained by physical limitations of the current energy ... -
Design development of brushless doubly fed machines
(2022-04)ENGLISH ABSTRACT: Doubly fed induction generators (DFIGs) are the most widely used generators in large wind turbines, because of their cheap constructions, smaller converter sizes, and wide speed range. However, DFIGs ... -
Planar magnetron sputtering of Ti and TiO2 for polyethylene terephthalate track-etched membrane surface modification
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The development of hybrid membranes intended for applications in various areas of indus try and academia is one of the challenges facing modern separation science and technology. Thus, specific fundamental ... -
Incremental inference on higher-order probabilistic graphical models applied to constraint satisfaction problems
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Probabilistic graphical models (PGMs) are used extensively in the probabilistic reasoning domain. They are powerful tools for solving systems of complex relationships over a variety of probability ... -
Mobile processors for scientific use: A critical analysis of the impact of design trends on performance and energy usage in scientific applications
(2022-04)ENGLISH ABSTRACT: This dissertation is an in-depth look into the effects that market driven decisions related to the spending of research and development funds have had on the performance of modern processors, especially ... -
Analysis and performance evaluation of large-scale wound rotor synchronous wind generator with non-overlap winding technology
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: This thesis covers the analysis, performance evaluation and design optimisation of a wound rotor synchronous generator (WRSG) for medium-speed wind generator drive train applications. Permanent magnet ... -
Degenerate Gaussian factors for probabilistic inference
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Gaussian random variables and distributions are widely used for inference across many ap- plications, where correlations within probabilistic models can be used to calculate accurate posterior distributions ... -
A novel approach to identify frequency transient (un)stable sub-networks in low-inertia power systems with high renewable energy penetration
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Due to global environmental concerns, power systems are transitioning from conventional to renewable energy sources (RES). The integration of large-scale inverter-based RES introduces numerous challenges ... -
Cooperative collision avoidance strategies for unmanned aerial vehicles
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: In this dissertation, a trajectory planning based cooperative collision avoidance system is proposed that provides integrated aircraft-to-aircraft collision avoidance and terrain avoidance for multiple ... -
Usage-based optimal energy control of residential water heaters
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Water heating contributes up to 40% of a household’s total electricity usage and places a substantial burden on the electricity grid due to high power ratings and users’ largely simultaneous hot water ... -
Modelling atmospheric transmittance for clear-sky spectral solar radiation in practical applications
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Solar radiation technological advancements are contributing to increased solar power generation, energy access, and innovative use of solar power. However, developing countries still experience contention ... -
Electrical-energy in schools with a focus on behavioural and efficiency interventions
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Schools are a substantial contributor in South Africa’s constricted energy landscape. Schools also face infrastructure and resource limitations and budgetary pressures. This tension thus creates a need ... -
Critical evaluation of large-scale gravity energy storage using linear vernier hybrid machine technology
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Energy storage technologies have received increased research attention in recent years. As a result of the wide array of technologies and possible applications, energy storage is predicted to play a ... -
Adaptive cross approximation methods for fast analysis of Antenna Arrays
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: This work is focused on developing efficient numerical electromagnetic algorithms forthe analysis of large antenna arrays, such as being considered as part of the internationalSquare Kilometre Array (SKA) ...
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