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Harmonic interaction between weak AC systems and VSC-based HVDC schemes
(Stellenbosch : Stellenbosch University, 2012-12)
ENGLISH ABSTRACT: The implementation of the Caprivi Link Interconnector (CLI) High Voltage Direct Current (HVDC) scheme in 2010 connecting the weak Namibian and Zambian Alternating Current (AC) transmission networks via ...
Development of an interactive energy management web application for residential end users
(Stellenbosch : Stellenbosch University, 2012-12)
ENGLISH ABSTRACT: Energy efficiency, as the effective use of energy, is recognized as one of the simplest ways to
improve the sustainable use of resources and by implication involves the end-user.
The 2008 power crisis ...
Design and analysis of a gearless, direct grid, permanent magnet induction wind generator
(Stellenbosch : University of Stellenbosch, 2011-03)
ENGLISH ABSTRACT: In this study a new type of gearless, direct-drive wind generator, which can be connected directly to the grid,
is proposed. The working characteristics of this generator are based upon the principles ...
Direct grid connection and low voltage ride-through for a slip synchronous-permanent magnet wind turbine generator
(Stellenbosch : Stellenbosch University, 2012-03)
ENGLISH ABSTRACT: The slip synchronous-permanent magnet generator (SS-PMG) is a direct-driven, direct-to-grid generator
for wind turbine applications. This investigation focuses on achieving automated grid connection ...
Design and analysis aspects of radial flux air-cored permanent magnet wind generator system for direct battery charging applications
(Stellenbosch : University of Stellenbosch, 2010-12)
ENGLISH ABSTRACT: The electromagnetic and mechanical design aspects of optimally designed doublesided
rotor radial flux permanent magnet wind generators with non-overlap aircored
(iron-less) stator windings are analysed ...
Predictive control of a series-input, parallel-output, back-to-back, flying-capacitor multilevel converter
(Stellenbosch : Stellenbosch University, 2011-12)
ENGLISH ABSTRACT: This thesis investigates the viability of constructing a solid-state transformer (SST) with
a series-input, parallel-output connection of full-bridge, three-level
ying-capacitor converters.
It focusses ...
A finite element based optimisation tool for electrical machines
(Stellenbosch : University of Stellenbosch, 2011-03)
ENGLISH ABSTRACT: Knowledge of the magnetic fields in the domain of electrical machines is required in order
to model machines accurately. It is difficult to solve these fields analytically because of
the complex geometries ...
An evaluation of HTV-SR insulators with different creepage lengths under AC and bipolar DC in marine polluted service conditions
(Stellenbosch : Stellenbosch University, 2012-03)
ENGLISH ABSTRACT: The use of high voltage direct current (HVDC) applications has gained enormous popularity for
long distance power transmission. This is due to the lucrative benefits offered by this type of
power ...
Digital control of line-interactive UPS
(Stellenbosch : University of Stellenbosch, 2011-03)
ENGLISH ABSTRACT: The digital control of UPS systems has been difficult in the past due to a lack of DSP technology. It was for
this reason not possible to establishing the necessary control to regulate the voltages and ...
Techniques for enhancing the PLD growth of superconducting YBCO thin films
(Stellenbosch : Stellenbosch University, 2014-12)
ENGLISH ABSTRACT: High Temperature Superconductors (HTS) exhibit exceptional electrical properties that make them
attractive candidates for numerous electronic devices and applications. However, constructing
working ...