IEEE Electrification Magazine - June 2017 - 66

can reduce the consumption of diesel and greenhouse gas
(GHG) emission, and protect the fragile arctic environment.
Feasibility studies were conducted in Crockford et al.
and Schleuniger et al. to analyze the technical and economic aspects of a hybrid wind-diesel power system in
Sarfannguaq. The study found that it is a viable solution to
install such a system from both technical and economic

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kWh Imported Energy

perspectives. The diesel consumption will be significantly
reduced and the overall energy cost can be minimized.
With sufficient diesel generation capacity in the system,
there are no specific challenges to run the system. To
improve the performance of the system, an electrical
energy storage system could be installed to improve the
system efficiency by pushing the diesel generator set to a
more efficient operating condition.
When selecting the wind turbine,
the following factors were considered:
x
available wind measurements
Wind Turbine 6 kW
Energy Monitoring Device
x
expected wind energy production
x
extreme wind conditions and
temperatures
x
the security and reliability of
Technical
the power system
University of
Denmark
x
installation and maintenance cost.
Power Plant (Nukissiorfiit)
Power Input
Load ~20-200 kW
In the end, a 6-kW proven wind
Diesel Generator 1 × 135 kVA
turbine was installed in the Sarfannguaq system. The overview of
the system is shown in Figure 1. To
meet the factors mentioned, the
Diesel Generator 2 × 220 kVA
tower for the nacelle was mounted
and reinforced by four workmen. The
nacelle contains only a multipole
permanent magnet generator and a
Figure 1. The hybrid wind-diesel power system of Sarfannguaq. (Image courtesy of T.B.S. Pedersslip ring system for the power conen 2013.)
nect between the generator and the
cable. The wind hits the blades from
the back and turns the nacelle,
which is why a yawing system is
March Energy Production
unnecessary. A 500-m-long cable is
100
drawn between the wind turbine
90
and the power station, where all
electronics (rectifier, inverters, and
80
communication equipment) are
70
installed in the tempered control
panel room. The size of the wind
60
turbine is rather small, to guarantee
50
an overall reliable power system. The
investment for this demonstration
40
plant has been huge-more than
30
US$8,500/kW.
20
After the wind turbine was installed, initially, the wind power pro10
duction was much lower than the
0
expected value. An example of the
daily production from the Sarfannguaq wind turbine before
improvements were made to the settings is shown in Figure 2. Thus, a
measurement system was designed
and installed on the wind turbine
Days
(K.L. Olsen et al. 2010). By analyzing
the collected data, the operation of
Figure 2. An example of the daily production from the Sarfannguaq wind turbine before improvements to the settings.
the three single-phase inverters

I E E E E l e c t r i f i c ati o n M agaz ine / j un e 2017

Table of Contents for the Digital Edition of IEEE Electrification Magazine - June 2017