Electricity: power supply or regulation systems – For reactive power control – Using converter
Patent
1997-01-14
1998-05-19
Hecker, Stuart N.
Electricity: power supply or regulation systems
For reactive power control
Using converter
G05F 170
Patent
active
057540357
ABSTRACT:
Power flow in a transmission line carrying alternating current is controlled by injecting into the transmission line in series a compensating voltage which is either in phase or 180.degree. out of phase with a reactive component of the transmission line voltage. The compensating voltage is generated by a voltage source converter operated by a controller which determines the angle of the transmission line voltage from voltage measurements taken at spaced apart points on the transmission line. Operation of the inverter in this voltage control mode results in an increase in power flow when the compensating voltage is injected at 180.degree. out of phase with the voltage across the transmission line effective reactance. When the compensating voltage is injected in phase with the voltage across the transmission line effective reactance, the power flow decreases at first from the uncompensated value and can be reduced to zero when the compensating voltage equals the voltage across the transmission line effective reactance without compensation. Further increase in the compensating voltage in the same direction reverses the direction of power flow.
REFERENCES:
patent: 4356441 (1982-10-01), Putman et al.
patent: 4555659 (1985-11-01), Gyugyi
patent: 5166597 (1992-11-01), Larsen et al.
patent: 5198746 (1993-03-01), Gyugyi et al.
patent: 5309346 (1994-05-01), Gyugyi
patent: 5329221 (1994-07-01), Schauder
patent: 5329222 (1994-07-01), Gyugyi et al.
patent: 5343139 (1994-08-01), Gyugyi et al.
patent: 5420495 (1995-05-01), Hingorani
patent: 5469044 (1995-11-01), Gyugyi et al.
patent: 5610501 (1997-03-01), Nelson et al.
patent: 5646511 (1997-07-01), Akamatsu et al.
"Series Compensator Inserting Real and Reactive Impedance Into Electrical Power System For Damping Power Oscillations," Serial No. 08/366,646, Filed: Dec. 30, 1994, Gyugyi et al., Docket No. 58,319.
"Apparatus and Method for Interline Power Flow Control," Serial No. 08/564,535, Filed: Nov. 29, 1994, Gyugyi, Docket No. 58686.
Hecker Stuart N.
Westinghouse Electric Corporation
LandOfFree
Apparatus and method for controlling flow of power in a transmis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for controlling flow of power in a transmis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for controlling flow of power in a transmis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1856056