| Popis: |
Aiming at small power grid’s influencing on the frequency stabilization of the power grid when load’s large change, the basic development present situation and work principle of active power filter are analyzed at first. Then combining active filter’s control strategy based on instantaneous reactive power and hysteresis current, the active filter simulation model about grid frequency’s change is established according to studying the method of using adaptive notch filter to measure power frequency. Finally, the simulation results prove that the active power filter model could track the changing frequency quickly and compensate harmonic current accurately, and enhance power quality and reliability of the small power grid. |
