Thesis (MScEng)--University of Stellenbosch, 2001. / ENGLISH ABSTRACT: In this thesis a new voltage control method is developed for a three-phase inverter
supply system. The inverter supply system consist of a Permanent Magnet Generator, a
three-phase rectifier, a three-phase inverter plus LC-filter and a three-phase transformer
in series. This system supplies power to a network or to a stand-alone load. The main
focus of this thesis is on the control aspects of the inverter and the LC-filter.
Different voltage control systems are investigated and compared to each other. From
these methods the proposed voltage control method is developed where only the output
voltages are measured to establish good voltage control. All these voltage control
methods are also simulated with a software package. The proposed voltage control
method compares very well with other voltage control methods. The results that are
obtained in the simulations are satisfactory. The proposed voltage control method is also
implemented in an 8 kW laboratory scale model and, again, very good practical results
are obtained. A TMS320F240 nsp controller is used to implement the proposed voltage
control method. The controller compensates well for load steps, and these results
compare well to an alternative voltage control method, which was also evaluated
practically. / AFRIKAANSE OPSOMMING: In hierdie tesis IS 'n nuwe spanningsbeheermetode ontwikkel VIr 'n drie-fase
wisselrigter kragtoevoerstelsel. Die wisselrigter kragtoevoerstelsel bestaan uit 'n
Permanent Magneet Generator, 'n drie-fase gelykrigter, 'n drie-fase wisselrigter plus
Le-filter, en 'n drie-fase transformator in serie. Hierdie stelsel voorsien krag aan 'n
netwerk sowel as aan 'n alleenstaande las. Die hooffokus van hierdie tesis is op die
beheeraspekte van die wisselrigter en Le-filter.
Verskillende spanningsbeheermetodes is deeglik ondersoek en vergelyk met mekaar.
Uit hierdie metodes is dan die voorgestelde beheermetode ontwikkel waar slegs die
uittreespanning gemeet word om goeie spanningsbeheer te kan doen. Al hierdie
spanningsbeheermetodes is dan gesimuleer met 'n sagteware pakket. Die voorgestelde
spanningsbeheermetode vergelyk baie goed met die ander spanningsbeheermetodes. Die
resultate verky in die simulasies is ook baie bevredigend. Die voorgestelde
beheermetode is ook geïmplementeer op 'n 8 kW laboratorium skaalmodel en weereens
is baie goeie praktiese resultate verky. 'n TMS320F240 DSP-beheerder is gebruik om
die voorgestelde beheermetode mee te implementeer. Die beheerder kompenseer baie
goed vir lastrappe en vergelyk ook goed met 'n ander spanningsbeheermetode wat
prakties ge-evalueer is.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/52608 |
| Date | 12 1900 |
| Creators | Jacobs, D. M. (Danver Maxwill) |
| Contributors | Kamper, M. 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 | 130 p. : ill. |
| Rights | Stellenbosch University |
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