6. Conclusion

The power modulation by using a PMSG wind turbine to damp the power oscillation in a multi-area power system is studied. H-infinity control is applied as a feedback control; where, the input is the variation of the local grid generator speed and the output feedback to the dcvoltage, blade pitch angle and PMSG speed controls. The high-order dynamic model of the wind generator system is reduced to simplify the analysis. The PMSG wind turbine connected to the IEEE 30 bus in different areas such as area 5 and 7. The results showed the effectiveness of the wind generator in significantly increasing damping. The dc link voltage modulation provides more damping to the grid power oscillations as it compares to the PMSG speed and rotor blade pitch angle modulations. The MATLAB/Simulink is used to design the controller and validate the results.
