CONTENTS Introduction Objective Squirrel Cage Induction Generator (SCIG) Wind Power System Topology Doubly Fed Induction Generator (DFIG) System Configuration Simulation Model Of DFIG When Unbalanced Load Is Connected To Grid Simulation Model Of DFIG When Non-linear Load Is Connected To Grid Comparison Of THD Based On Shunt Active Filter Connected Across Load Conclusion

INTRODUCTION As the power demand is increasing, generation units to feed the loads are also have been increasing. The increasing emphasis on renewable wind energy has given rise to augmented attention on more reliable and advantageous electrical generator systems.

OBJECTIVE The main objective is to extract maximum power from wind energy, by using different induction generators i.e SCIG and DFIG and comparison of both generators for distribution line voltage, active and reactive power control. Due to the non linearity or unbalance load connected to grid, they increases THD of system and reduce system performance. This can be overcome by using shunt active filter connecting across load.

SCIG Wind Power System Topology

Simulation Model For SCIG With Out STATCOM

Description SCIG is of fixed speed generator for a particular wind speed, the output active power is fixed as well It is worthy to notice that, with out reactive power source SCIG system tends to lead to a voltage droop in distribution line To provide necessary reactive power, a STATCOM is added on the distributed line to investigate the improvement

Vw (m/s) Wr (p.u) P (MW) Q(Mvar) BETA(deg.) Line voltage Time (sec.) Simulation Results For SCIG With Out STATCOM

Simulation Model For SCIG With STATCOM

Vw (m/s) Wr (p.u) P (MW) Q(Mvar) BETA(deg.) Line voltage Time (sec.) Simulation Results For SCIG With STATCOM

Comparison Of Distributive Line Voltage For SCIG Without And With STATCOM

Doubly Fed Induction Generator System Configuration

Simulation Model Of DFIG For Wind Step Response

Description STATCOM provides impressive help on constant distribution line voltage, DFIG presents better results and does not need the help from STATCOM STATOR-SIDE CONVERTER CONTROL SYSTEM :  stator side converter circuit is used to maintain constant dc link voltage which is fed to rotor side converter ROTOR-SIDE CONVERTER CONTROL SYSTEM:  Rotor side converter (RSC) provide excitation for the induction machine rotor with this PWM convertor it is possible to control the torque. Consequently the active and reactive power is controlled.

V dc(V) Wr(P.U) P(M.W) Q(Mvar) Vw(m/s) Line voltage Time (sec.)

Simulation Model Of DFIG When Unbalanced Load Is Connected To Grid

Comparison Of THD For Unbalanced Load Connected To Grid THD Before Connecting SAFTHD After Connecting SAF

Simulation Model Of DFIG When Non-Linear Load Is Connected To Grid

Comparison Of THD For Non- Linear Load Connected To Grid THD Before Connecting SAFTHD After Connecting SAF

Conclusion

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QUERIES

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