Hilfsspannungsversorgungskonzepte für Mittelspannungs-DC/DC-Wandler

• Auxiliary power supply concepts for medium voltage DC-DC converters

Gottschlich, Jan; de Doncker, Rik W. (Thesis advisor); Heinen, Stefan (Thesis advisor)

Aachen : RWTH Aachen University (2021, 2022)
Book, Dissertation / PhD Thesis

In: Aachener Beiträge des ISEA 156
Page(s)/Article-Nr.: 1 Online-Ressource : Illustrationen, Diagramme

Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2021

Abstract

In the course of the increasing use of renewable energy sources, medium voltage DC grids represent an efficient and flexible alternative to present AC technology for power distribution. In this scenario power electronic converters take the place of transformers. This thesis deals with black-start capabale systems for supplying such DC-DC converters with the auxiliary energy required for operation. Concepts for a reliable and flexible auxiliary power supply from several grids are presented. Two novel converter topologies, an NPC series resonant converter and a two-stage converter, are being examined in detail for the supply from medium-voltage DC grids. Special aspects of the implementation such as start-up circuits, gate drivers and magnetic components are also considered. The approaches presented are verified on prototypes.