Analysis of wind turbines connected to medium-voltage DC grids

Author

Stieneker, Marco ; Averous, Nurhan Rizqy ; Soltau, Nils ; Stagge, Hanno ; De Doncker, Rik W.

Author_Institution

E.ON Energy Res. Center, RWTH Aachen Univ., Aachen, Germany

fYear

2014

fDate

26-28 Aug. 2014

Firstpage

1

Lastpage

10

Abstract

The transmission and distribution of electrical energy with direct current (dc) is a promising alternative to established alternating-current (ac) systems. Higher efficiencies, fewer lossy pulse-width modulated converters and smaller transformers reduce operation and investment costs. Moreover, dc collector grids within wind parks leads to benefits for harvesting electrical energy. In this paper, a modular dual-active bridge (DAB) dc-dc converter system for integrating renewable energy sources, especially wind turbines (WT), into medium-voltage dc (MVDC) grids is presented and analyzed. Also, the design and efficiency of the machine-side power converter of the WT for dc grids are discussed.

Keywords

DC power transmission; DC-DC power convertors; power grids; wind power plants; wind turbines; MVDC grids; alternating-current systems; dc collector grids; direct current; electrical energy distribution; electrical energy transmission; machine-side power converter; medium-voltage dc grids; modular DAB dc-dc converter system; modular dual-active bridge dc-dc converter; renewable energy sources; wind parks; wind turbines; Bridge circuits; Generators; HVDC transmission; Power transformer insulation; Semiconductor diodes; Snubbers; Wind turbines; DC collector network; Regenerative power; Renewable energy systems; Wind energy;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications (EPE'14-ECCE Europe), 2014 16th European Conference on

Conference_Location

Lappeenranta

Type

conf

DOI

10.1109/EPE.2014.6911015

Filename

6911015