Abstract
This paper presents the direct power control of a hybrid wind energy conversion system/active filter for non linear condition. The rotor side converter controls the active and reactive power injected to the grid by the stator of the doubly fed induction generator. The specify of the grid side converter (GSC) is to assure simultaneously the DC link voltage regulation, and harmonic currents mitigation which are delivered by non linear load. For this reason, a modified control strategy (DPC) of the GSC which combines the active filtering function with DC link voltage control is proposed. The simulation result shows a well performance of the modified control strategy for GSC.
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Abbreviations
- \( WECS \) :
-
Wind energy conversion system
- \( is,ir \) :
-
Stator and rotor current vectors
- \( \varPhi_{s} \varPhi_{r} \) :
-
Stator and rotor flux linkage vectors
- \( \omega_{s} ,\omega_{r} \) :
-
Stator and rotor angular frequency
- \( M \) :
-
Mutual inductance
- \( Ps,Qs Pr,Qr \) :
-
Stator and rotor active and reactive powers
- \( Rs, Rr \) :
-
Stator and rotor resistances
- \( Ls,Lr \) :
-
Stator and rotor inductances
- \( \theta s, \theta r \) :
-
Stator and rotor flux angles in the rotor frame
- \( v_{sd} , v_{sq} , v_{rd} , v_{rq} \) :
-
Stator and rotor d–q voltages components
- \( i_{sd} ,i_{sq} ,i_{rd} ,i_{rq} \) :
-
Stator and rotor d–q currents components
- \( \varPhi_{sd} , \varPhi_{sq} , \varPhi_{rd} , \varPhi_{rq} \) :
-
Stator and rotor d–q flux components
- \( p \) :
-
Machine pole pairs
- \( T_{r} \) :
-
Resistant torque
- \( f \) :
-
Viscous coefficient
- \( J \) :
-
Total inertia
- \( V_{dc} \) :
-
DC bus voltage
- \( Pg \) :
-
Grid activ power
- \( Qg \) :
-
Grid reactive power
- \( \varvec{i}_{\varvec{g}} \) :
-
Grid side converter current
- \( P_{est} \) :
-
Estimated active power
- \( Q_{est} \) :
-
Estimated reactive power
- \( Hq, Hp \) :
-
Hysteresis bands
- \( \lambda \) :
-
Voltage vector position
- \( dp,dq \) :
-
Digitized variables
- \( Sa,Sb,Sc \) :
-
Switching state
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Appendix
Appendix
Grid parameters: | Vs = 230 V,50 Hz,ωs = 314 rad/s. |
DFIG parameters: | Pn = 7.5 kW, Nn = 1450tr/min, p = 2, |
J = 0.3125 kg.m2, f = 0.00673Nm/s, | |
Rs = 0.455Ω, Rr = 0.62 Ω, Ls = 84mH, | |
Lr = 81H, M = 78mH, σ = 0.0106 | |
Non linear load RL: | Rc = 90Ω, Lc = 0.5H |
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Mesbahi, T., Ouari, A., Ghennam, T. et al. A hybrid wind energy conversion system/active filter for non linear conditions. Int J Syst Assur Eng Manag 7 (Suppl 1), 1–8 (2016). https://doi.org/10.1007/s13198-014-0250-5
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DOI: https://doi.org/10.1007/s13198-014-0250-5