Abstract
Energy shortage and environmental pollution have led to the increasing demand of using renewable sources for electricity production. Currently, power generation from wind energy systems (WES) is of global significance and will continue to grow during the coming years leading to concerns about power system stability where wind farms replace conventional generating technologies that use fossil fuels as the primary energy source. One of these concerns is low-voltage ride-through (LVRT). In this chapter, a novel topology based on the use of magnetic amplifier for enhancing the low voltage ride through capability for grid connected permanent magnet synchronous generators (PMSG).
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Abbreviations
- \({{C}_{p}}\) :
-
Performance coefficient of wind turbine
- \(f\) :
-
Supply frequency (Hz)
- \({{i}_{b}}\) :
-
Boost converter inductor current (A)
- \({{i}_{dg}},{{i}_{qg}}\) :
-
dq PMSG stator current components (A)
- \({{i}_{a}},{{i}_{b}},{{i}_{c}}\) :
-
Three phase grid currents (A)
- \({{i}_{d}},{{i}_{q}}\) :
-
dq axis components of grid currents (A)
- \({{i}_{d}}^{*},{{i}_{q}}^{*}\) :
-
dq reference grid current components (A)
- \({{i}_{s}}\) :
-
PMSG supply current (A)
- \({{i}_{c}}\) :
-
Magnetic amplifier control winding current (A)
- \({{I}_{inv}}\) :
-
Inverter IGBT current (A)
- \({{I}_{rec}}\) :
-
Rectifier diode current (A)
- \({{L}_{f}}\) :
-
Booster inductance (H)
- \({{L}_{d}},{{L}_{q}}\) :
-
PMSG dq axis inductances (H)
- \({{P}_{w}}\) :
-
Power absorbed by windmill
- \({{P}_{Grid,}}{{Q}_{Grid}}\) :
-
Grid active & reactive power (Watt, VAR)
- \({{P}_{Gen}},{{Q}_{Gen}}\) :
-
PMSG active & reactive power (Watt, VAR)
- \({{R}_{a}}\) :
-
Stator armature resistance (Ω)
- R:
-
Windmill blade radius (m)
- \({{T}_{e}}\) :
-
Electromagnetic torque (Nm)
- V:
-
Wind velocity (m/sec)
- \({{V}_{inv}}\) :
-
Inverter IGBT voltage (V)
- \({{v}_{b}}\) :
-
Input capacitor voltage of boost converter (V)
- \({{v}_{dc}}\) :
-
DClink capacitor voltage (V)
- \({{V}_{rec}}\) :
-
Rectifier diodes reverse voltage (V)
- \({{v}_{a}},{{v}_{b}},{{v}_{c}}\) :
-
Three phase grid voltages (A)
- \(\beta \) :
-
Blade pitch angle (BPA)
- \(\delta \) :
-
Load angle, between q-axis and phase “a” voltage, (rad)
- \({{\varphi }_{f}}\) :
-
Permanent magnet flux linkage (Wb)
- \({{\varphi }_{d}},{{\varphi }_{q}}\) :
-
dq axis flux-linkages (Wb)
- \(\theta \) :
-
Phase angle of grid voltage (degree)
- \(\lambda \) :
-
Tip-speed ratio (TSR)
- \(\rho \) :
-
Air density
- \(\omega \) :
-
Electrical rotor angular speed (rad/s)
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Ibrahim, R., Hamad, M., Dessouky, Y., Williams, B. (2015). A Novel Topology for Enhancing the Low-Voltage Ride-Through Capability for Grid Connected Wind Turbine Generators. In: Sayigh, A. (eds) Renewable Energy in the Service of Mankind Vol I. Springer, Cham. https://doi.org/10.1007/978-3-319-17777-9_78
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DOI: https://doi.org/10.1007/978-3-319-17777-9_78
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