Electricity: power supply or regulation systems – For reactive power control – Using converter
Patent
1996-06-20
1998-05-12
Wong, Peter S.
Electricity: power supply or regulation systems
For reactive power control
Using converter
363 41, 363 43, G05F 170, H02M 112
Patent
active
057511381
ABSTRACT:
An active power quality conditioner for compensating reactive power and harmonic distortion in power systems. A pulse width modulated (PWM) inverter (70) for each phase is controlled to produce a harmonic distortion compensation signal that is coupled to an inductor. The inductor is connected in series between a stepped-wave inverter (84) and one phase of the power line. A current produced by the stepped-wave inverter compensates for the reactance of a load coupled to the power line. The PWM inverter operates at a frequency that is substantially greater than the fundamental frequency of the power line and is not exposed to the full power line voltage; it can be constructed using components of relatively low power and voltage rating. In contrast, the stepped-wave inverter, which is decoupled from the PWM inverter, operates at the fundamental frequency and is subjected to most of the stress. Both shunt coupled and series coupled compensators are described. Compensation for an unbalanced load is provided using a compensator (364) that includes a 24-pulse stepped-wave inverter (366).
REFERENCES:
patent: 3825814 (1974-07-01), Pelly
patent: 4903184 (1990-02-01), Hirose
patent: 5138247 (1992-08-01), Tanoue et al.
patent: 5321598 (1994-06-01), Moran
patent: 5384696 (1995-01-01), Moran et al.
patent: 5438253 (1995-08-01), Aritsuka et al.
patent: 5495403 (1996-02-01), Dhyanchand et al.
patent: 5586018 (1996-12-01), Aoyama et al.
patent: 5642007 (1997-06-01), Gyugyi et al.
patent: 5642273 (1997-06-01), Lai et al.
Flairty, C.W., "A 50-KVA Adjustable-Frequency 24-Phase Controlled Rectifier Inverter," (pp. 332-336), Reprinted from IRE Transactions on Industrial Electronics, pp. 56-60, May 1962.
Kagalwala Raxit A.
Raju N. Ravisekhar
Sastry Vedula V.
Venkata Subrahmanyam S.
Anderson Ronald M.
Jardieu Derek J.
University of Washington
Wong Peter S.
LandOfFree
Active power conditioner for reactive and harmonic compensation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Active power conditioner for reactive and harmonic compensation , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active power conditioner for reactive and harmonic compensation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-984181