Active capacitor voltage stabilisation in a medium-voltage flying-capacitor multilevel active filter

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dc.contributor.advisor Mouton, H. du T. Hansmann, Chirstine Henriette en_ZA
dc.contributor.other University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. 2006-11-21T06:36:46Z en_ZA 2010-06-01T08:32:42Z 2006-11-21T06:36:46Z en_ZA 2010-06-01T08:32:42Z 2005-03 en_ZA
dc.description Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2005.
dc.description.abstract A switching state substitution must be developed that will make use of both single-phase redundancies and three-phase redundancies in the flying-capacitor topology. Losses should be taken into consideration and the algorithm must be designed for implementation on the existing PEC33 system, with on-board DSP (TMS320VC33) and FPGA (EP1K50QC208). The specific power-electronics application is a medium-voltage active filter. Existing capacitor voltage stabilisation schemes are investigated and a capacitor-voltage based algorithm is developed that is investigated in parallel with the Donzel and Bornard algorithm. Detailed simulation models are built for the evaluation of both existing and the proposed algorithm. Three-phase control is also evaluated. Timing analysis of the proposed algorithm shows that a DSP-only implementation of the proposed capacitor-based solution is not feasible. Detail design of the digital controller hereof is implemented in VHDL. Finally, a four-cell controller is fitted into the FPGA. A scalable hardware sorting architecture is utilised. en_ZA
dc.format.extent 7433032 bytes en_ZA
dc.format.mimetype application/pdf en_ZA
dc.language.iso en_ZA en_ZA
dc.publisher Stellenbosch : University of Stellenbosch
dc.subject Active electric filters en_ZA
dc.subject Switched capacitor circuits en_ZA
dc.subject Electric current converters en_ZA
dc.subject Dissertations -- Electrical engineering en_ZA
dc.subject Theses -- Electrical engineering en_ZA
dc.subject.other Electrical and Electronic Engineering en_ZA
dc.title Active capacitor voltage stabilisation in a medium-voltage flying-capacitor multilevel active filter en_ZA
dc.type Thesis en_ZA
dc.rights.holder University of Stellenbosch
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