Abstract

Meshed high-voltage-DC (HVDC) grids will play a significant role in future electric energy transmission. Line commutated converters as installed by default in the recent years will be replaced by voltage source converters in the future, thus enabling a rather simple multi terminal operation. To connect HVDC installations with differing nominal voltages, the development of HVDC-DC-converters is essential. In this publication, basic considerations regarding topology and control of those devices are made and a demonstrator, designed and built within the framework of the research project „GriDConv“ at Graz University of Technology, is presented. The device is designed as hybrid cascaded two-level-converter with three branches to demonstrate the principle of operation and selected control functionalities. The basic parameters are 800 V on the primary side, 500 V on the secondary side and 50 kW transfer capacity. Electromagnetic compatibility (EMC) plays an important role in the design. The efficiency of different methods for improving EMC can be tested with the demonstrator.

Titel in ÜbersetzungInnovative HVDC-DC-converter for high-voltage DC-grids—basic considerations of topology, control and electromagnetic compatibility
Originalsprachedeutsch
Seiten (von - bis)497-506
Seitenumfang10
Fachzeitschrifte&i - Elektrotechnik und Informationstechnik
Jahrgang135
Ausgabenummer8
DOIs
PublikationsstatusVeröffentlicht - 1 Dez 2018

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Electromagnetic compatibility
DC-DC converters
Topology
Electric potential

Schlagwörter

  • active power
  • control
  • DC-converter
  • electromagnetic compatibility
  • high voltage direct current system
  • HVDC
  • multi level converter
  • power electronics

ASJC Scopus subject areas

  • !!Electrical and Electronic Engineering

Dies zitieren

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abstract = "Meshed high-voltage-DC (HVDC) grids will play a significant role in future electric energy transmission. Line commutated converters as installed by default in the recent years will be replaced by voltage source converters in the future, thus enabling a rather simple multi terminal operation. To connect HVDC installations with differing nominal voltages, the development of HVDC-DC-converters is essential. In this publication, basic considerations regarding topology and control of those devices are made and a demonstrator, designed and built within the framework of the research project „GriDConv“ at Graz University of Technology, is presented. The device is designed as hybrid cascaded two-level-converter with three branches to demonstrate the principle of operation and selected control functionalities. The basic parameters are 800 V on the primary side, 500 V on the secondary side and 50 kW transfer capacity. Electromagnetic compatibility (EMC) plays an important role in the design. The efficiency of different methods for improving EMC can be tested with the demonstrator.",
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AU - Deutschmann, Bernd

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