Power conversion circuit control apparatus

Details Power conversion circuit control apparatus Power conversion circuit control apparatus

2007-12-18

2007-12-18

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S041000, C363S056010, C363S132000, C323S207000

Reexamination Certificate

active

11585079

ABSTRACT:
This invention provides a power conversion circuit control apparatus which rapidly detects the voltage amplitude and phase of each phase, corrects the output of a current controller by the mean voltage amplitude and mean phase, and corrects, on the basis of the voltage amplitude and phase of each phase, a voltage amplitude command and voltage phase command to be applied to pulse width modulation. The apparatus can suppress an overcurrent even when the AC voltage is unbalanced, and restart the operation without generating any overcurrent when the circuit is to be reactivated.

REFERENCES:
patent: 4570214 (1986-02-01), Tanaka
patent: 5537307 (1996-07-01), Hirose et al.
patent: 5798633 (1998-08-01), Larsen et al.
patent: 54-82649 (1979-07-01), None
patent: 6-175741 (1994-06-01), None
Jiang et al., “Applying PWM to Control Overcurrents at Unbalanced Faults of Forced-Commutated VSCs Used as Static Var Compensators,” IEEE Transactions on Power Delivery (Jan. 1997), 12:273-278.

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