Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1513346 | Energy Procedia | 2012 | 8 Pages |
Abstract
In the future, large offshore wind turbines are expected to reach a rating of 10 MW. To reduce the corresponding weight increase of the nacelle, research has started to focus on solutions to omit the step-up transformer in each turbine. Therefore this paper investigates a modular converter suitable for a special high power, transformer-less generator drive with 36 kV output DC-voltage. The drive consists of nine converter modules connected in series on the DC-side to obtain a high output voltage. Due to the series connection, extra care has to be taken to achieve equal voltage division between the converter modules. Therefore, a DC-voltage balancing scheme based on a droop control is proposed. The performance of the system will be demonstrated through simulations in EMTDC/PSCAD.
Related Topics
Physical Sciences and Engineering
Energy
Energy (General)
Authors
Sverre Skalleberg Gjerde, Tore M. Undeland,