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Study on Offshore Wind Farm Integration Mode
and Reactive Power Compensation
Xiaoyan Bian, Lijun Hong, and Yang Fu
Power and Automation Engineering Department, Shanghai University of Electrical
Power, 200090, Shanghai, China
{
kuliz,honglijunv
}
@163.com
Abstract.
Two typical offshore wind farm grid-connected modes are
introduced and dynamic characteristics under their modes are compared
from the simulation by PSS/E. The result shows that offshore wind farm
with VSC-HVDC has better dynamic characteristics on fault isolation,
reactive power compensation, and fault ride through ability. In addition,
STATCOM has been applied to the offshore wind farm, the simulation
results indicates that it can improve the bus voltage stability in fault and
maintain the voltage level under a small perturbation.
Keywords:
Wind Farm, Integration Mode, VSC-HVDC, STATCOM.
1 Introduction
With the rapid development of wind power technology and expansion of scale,
land-based large-scale wind farms cannot meet the requirements of wind power
industry development. Abundant resources of offshore wind attracted interna-
tional community to give high attention on the development of offshore wind
farms. Currently, offshore wind farm is limited to the intertidal zone and near
the shore, but the construction of wind farm far from shore will be realized in
sooner. Compared with land-based wind farms, the main features of the offshore
wind as follows: (1) Abundant offshore wind resources, high and stable wind
speed as well as a large continuous area available and less development space
constraints; (2)The smaller environmental impact (3) Diculty in power trans-
mission and grid connection. Offshore wind farm located in sparsely populated
areas and away from land with the character of large energy production made
ordinary low-voltage cable dicult to transfer energy. Mainly used three meth-
ods of grid integration are HVAC, PCC-HVDC and VSC-HVDC. (4) Diculty
in construction and maintenance technology with high cost. The initial invest-
ment of offshore wind power projects is higher than onshore wind power projects
owing to the higher cost of grid connection and support structure. Therefore,
the choice of wind farm grid connection has a major impact on the offshore wind
power projects, such as dynamic stability, power quality.
Concept ensuring wind farm and grid security capacity is proposed, using
different measures to improve transient stability of power grid and improve safety
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