Page 277 - Renewable Energy Devices and System with Simulations in MATLAB and ANSYS

264 Renewable Energy Devices and Systems with Simulations in MATLAB and ANSYS ®
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ω r
PCC Grid
Wind v m v d L
i m v
i
i d
v* v*
SPWM SPWM
ω r Synchronous current Synchronous current
UV control and vector control with decoupler UV
ω sl
regulator and vector regulator
i * – i * i * i d *=0 i *
q
d
q
d0
+
ω sl Ks
∆i *
d
Power
Power
Controller-6 Controller-4 calculation Controller-3 calculation
ω
∆ω r P o r P r + – P o
+ *
T e Controller-2 P o Controller-1
ω *
+ – + r
∆ω r T * V d V * ω ∆ω
d
Controller-5 e r r
FIGURE 10.10 Basic control of a variable speed wind generator.

10.7 SUMMARY
Wind power is nowadays considered as an alternative to fossil fuel to generate electrical power.
Several large-scale wind farms are already installed in many places throughout the world where
good wind conditions are present. Apart from that, small-scale wind farms and stand-alone wind
generators are also being installed in many parts of the world. Most of the good windy locations
have already been occupied by large-scale wind farms populated with large wind turbines, offshore
installations, but there are still a lot of possibilities for medium- and small-scale wind farms, as well
as stand-alone small wind turbines, which may be installed by small consumers. It is important to
know how to determine the rating of the wind turbine generator system, the calculations behind
it, which type of wind generator will be effective when installed, and also consider economic and
technological aspects. In this chapter, the authors tried to present several such issues, helping the
readers, end users, and small consumers to have a broad view of control and design of small wind
power systems.

REFERENCES

1. F.A. Farret and M. Godoy Simões, Integration of Alternative Sources of Energy, 2nd edn., John Wiley &
Sons, Hoboken, NJ, 2017.
2. J.G. Slootweg and S.W.H. De Haan, General model for representing variable speed wind turbines in
power system dynamics simulation, IEEE Transactions on Power Systems, 18(1), 144–151, February
2003.