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Title:
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North Sea Transnational Grid, Dynamic wind farm model for simulating multi-termal HVDC grids
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Author(s):
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Published by:
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Publication date:
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ECN
Wind Energy
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10-2-2014
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ECN report number:
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Document type:
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ECN-E--14-006
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ECN publication
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Number of pages:
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Full text:
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93
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Download PDF
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Abstract:
The integration of a large share offshore wind energy in the European electricity system
requires a significant effort for the development of an offshore grid infrastructure.
With the increasing wind farm sizes and distances to the onshore grid connection points,
the technical and economical limits of High Voltage AC (HVAC) cables are reached at a
certain point. With the development of High Voltage DC (HVDC) systems it has become
feasible to build long transmission links to offshore wind farms, to interconnect wind
farms and even to establish transnational interconnections for international exchange of
wind power.
In the NSTG project three scenarios for the NSTG are studied, representing different
stages in the development of this grid, cf. [9]. Besides a good technical performance
and economical feasibility the NSTG should be flexible and modular. This means that
wind turbines and converters of different technologies and with different ratings can be
connected and that the grid design is suitable for stepwise extension. It is likely that the
NSTG will expand in steps, each time applying newer generations of power electronic
converters and cable technology. Further, the NSTG will not only be connected to different
national grids, but also to HVDC interconnectors, generating units, loads and storage
systems.
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