Thesis (MScIng)--Stellenbosch University, 2003. / ENGLISH ABSTRACT: The effect of topography and terrain on wind is examined in order to ensure that the wind turbine
positioning will encourage a greater availability of wind energy to it. Maximum power point
tracking methods are presented whereby the loading on the wind turbine is controlled to ensure
that the maximum available energy from the wind is captured. The wind turbine system is
modelled and used in simulations to evaluate the three proposed maximum power point trackers,
named anemometer control, calculation control and constant step control for the purpose of this
thesis. An additional analog system is also created whereby the complete wind turbine system is
able to be simulated. An inverter is used to replicate the generator and the loading is controlled
using an active rectifier since this will be used on the practical system. The results from the
simulations and analog system are presented whereby one of the trackers is shown to be
inadequate and the other two trackers are shown to be close to ideal. The appeal of the
calculation method is in the redundancy of an anemometer making it attractive to less expensive,
small-scale systems. / AFRIKAANSE OPSOMMING: Die invloed van die topografie en die terrein op die dinamika van wind word ondersoek om
sodoende te verseker dat die posisionering van wind turbienes 'n beter effektiwiteit van wind
energie oordrag sal bewerkstellig. Maksimum drywingspunt volger metodes word bespreek sodat
die lading op die wind turbiene beheer kan word om sodoende te verseker dat die maksimum
wind energie oorgedra kan word. Die wind turbiene stelsel word gemodeleer en geimplimenteer
om die drie voorgestelde maksimum drywingspount volgers te evalueer, naamlik windspoedbeheer,
berekening-beheer en konstantestap-beheer vir die doeleindes van hierdie tesis. 'n
Adissionele analoog stelsel is ontwerp waarmee die volledige wind turbiene stelsel gesimuleer
kan word. 'n Omsetter word gebruik om die generator na te boots en die belading word beheer
deur middel van 'n aktiewe gelykrigter soos gebruik 'n praktese stelsel. Resultate van die
simulasies en die analog stelsel is verskaf om te bewys dat een van die volg-metodes
onvoldoende volging bewerkstellig, en die ander twee nabyaan ideale volging bewerkstellig. Dit
is getoon dat die berekening metode meer aantreklik is vir kleinskaal stelsels, aangesien 'n
windspoedsensor onnodig is.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/53542 |
| Date | 12 1900 |
| Creators | Moor, Gary Duncan |
| Contributors | Beukes, H. J., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | Unknown |
| Type | Thesis |
| Format | 112 p. : ill. |
| Rights | Stellenbosch University |
Page generated in 0.0021 seconds