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UBC Theses and Dissertations

A model H.V.D.C. link Riches, Robert Ian Dudley

Abstract

This thesis presents the design and implementation of a physical model of a high voltage d.c. link to the extent that the steady state mathematical model may be validated. A conventional control system was implemented using an analog computer and featuring a new method for the detection of inverter extinction angle. A commercial 'equal angle' firing circuit was found to be a major limitation. An attempt was made to validate a steady state linearized continuous mathematical model using a method of analysis devised by Siljak, an extension of the Mitrovic method. The often made linear continuous assumption was found to be valid only for small bandwidth systems, in which case theoretical and experimental behaviours agree.

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