Grid integration of offshore wind farms using multi-terminal DC transmission systems (MTDC)

This paper discusses the control flexibility and fault ride-through capability of the bi-polar multi-terminal DC transmission system based on voltage source converters used for integration of large-scale offshore wind farms. Issues such as voltage support and short-term frequency stabilization of th...

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Bibliographic Details
Main Authors: Giddani, O.A, Adam, G.P, Anaya-Lara, O, Lo, K.L
Format: Conference Proceeding
Language:English
Subjects:
Control of electric power systems
d.c. transmission
Power convertors and power supplies to apparatus
Wave power
Wind power plants
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Summary:This paper discusses the control flexibility and fault ride-through capability of the bi-polar multi-terminal DC transmission system based on voltage source converters used for integration of large-scale offshore wind farms. Issues such as voltage support and short-term frequency stabilization of the AC network utilizing the stored energy in the wind turbine inertia and DC link capacitors are discussed. Regarding control flexibility, two aspects are presented: power sharing between the grid-side converters by any ratio, and provision of an alternative path for the power flow in case of a permanent DC fault or loss of one grid-side converter. In this investigation, the wind farms are based on fixed-speed wind generators, while the converters are modelled as a neutral-point clamped converter using the universal bridge. The investigation was conducted in Matlab/Simulink. (6 pages)
DOI:10.1049/cp.2010.0094