Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1996-06-21
1998-03-24
Hecker, Stuart N.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 40, 307105, H02M 112, H02M 114
Patent
active
057319650
ABSTRACT:
A hybrid parallel active/passive filter system is provided which provides line power harmonic isolation and compensation for power systems connected to high power non-linear loads. The hybrid filter includes a passive filter connected in series with an active filter inverter. The active filter inverter is controlled to generate inverter voltages such that the filter terminal voltage tracks the supply voltage harmonics at a selected dominant harmonic frequency to regulate the supply current harmonics to zero. A synchronous reference frame (SRF) based controller is used to generate harmonic inverter voltage commands based on measured supply current values. A feed forward command signal generator may be used to improve the response of the control system. The active filter inverter is preferably implemented as a square-wave inverter. The active filter inverter DC bus is controlled to achieve power balancing and to provide real power to compensate for losses of the inverter. Power balancing is achieved by exchanging energy at the fundamental and dominant harmonic frequency of the active filter inverter. Control of the active filter inverter to achieve DC bus control and harmonic isolation simultaneously is accomplished using DC bus control inverter voltage command signals generated at the fundamental frequency in combination with harmonic inverter voltage command carrier signals at the dominant harmonic frequency to form low frequency switching signals for the square-wave inverter switching devices.
REFERENCES:
patent: 4053820 (1977-10-01), Peterson et al.
patent: 5198746 (1993-03-01), Gyugyi et al.
patent: 5329222 (1994-07-01), Gyugyi et al.
patent: 5355025 (1994-10-01), Moran et al.
patent: 5465203 (1995-11-01), Bhattacharya et al.
patent: 5513090 (1996-04-01), Bhattacharya et al.
patent: 5548165 (1996-08-01), Mohan et al.
patent: 5567994 (1996-10-01), Davis et al.
patent: 5614770 (1997-03-01), Suelzle
L. Gyugyi & E.C. Strycula, "Active AC Power Filters", IEEE-IAS Conf. Rec., pp. 529-535, 1976.
N. Mohan, et al., "Active Filters for AC Harmonic Suppresion", IEEE/PES Winter Power Meeting, pp. 168-174, 1977.
I. Takahashi & A. Nabae, "Universal Power Distortion Compensator of Line Commutated Thyristor Converter", Proc. IEEE/IAS Annu. Meeting, pp. 858-864, 1980.
Hirofumi Akagi, et al., "Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components", IEEE Trans. Indus. App., vol. IA-20, No. 3, pp. 625-630, 1984.
D.M. Divan, "Non Dissipative Switched Networks for High Power Applications", Electronics Letters, vol. 20, No. 7, pp. 277-279, Mar. 1984.
F.Z. Peng, et al., "A New Approach to Harmonic Compensation in Power Systems", IEEE-IAS Conf. Rec., pp. 874-880, 1988.
Hideaki Fujita & Hirofumi Akagi, "A Practical Approach to Harmonic Compensation in Power Systems--Series Connection of Passive and Active Filters--", IEEE-IAS Conf. Rec., pp. 1107-1112, 1990.
N. Balbo, et al., "Hybrid Active Filter for Parallel Harmonic Compensation".
Isao Takahashi, et al., "Low Price and High Power Active Filter", IEEE Japan National Convention, pp. E95-E98, 1991.
S. Bhattacharya, et al., "Synchronous Frame Harmonic Isolator Using Active Series Filter", EPE' 91 Conf. Rec., vol. 3, pp. 30-35, Florence, 1991.
S. Bhattacharya, "A Unified Power Flow Control to Flexible AC Transmission Systems", ECE 714 Project Report, Univ. of Wisconsin--Madison, May 1992.
Hirohito Funato & Atsuo Kawamura, "Proposal of Variable Active-Passive Reactance", IEEE IECON Conf. Rec., vol. 1, pp. 381-388, 1992.
Hirohito Funato & Atsuo Kawamura, "Analysis of Variable Active-Passive Reactance", IEEE PCC Conf. Rec., pp. 647-652, 1993.
S. Bhattacharya, et al., "Control and Reduction of Terminal Voltage Total Harmonic Distortion (THD) in a Hybrid Series Active and Parallel Passive Filter System", IEEE PESC Conf.Rec., pp. 779-786, 1993.
Hirohito Funato & Atsuo Kawamura, "Control of Variable Active-Passive Reactance (VAPAR) and Negative Inductance", IEEE PESC Conf., Rec., pp. 189-196, 1994.
H. Akagi, "New Trends in Active Filter", EPE '91 Conf. Rec., vol. 0, pp. 017-026, 1995.
Mukul Rastogi, et al., "Hybrid-Active Filtering of Harmonic Currents in Power Systems", presented at the 1995 IEE/PES Winter Meeting, New York, Jan. 29-Feb. 2, 1995.
Ned Mohan & Girish R. Kamath, "A Novel, Per-Phase Interface of Power Electronic Apparatus for Power System Applications", presented at NAPS 95, Bozeman, Montana, 1995.
J. Hafner, et al., "A Combined System of a Passive Filter and a Shunt Active Power Filter to Reduce Line Current Harmonics", Proc. 1995 IPEC, Yokohama, Japan, pp. 388-393, 1995.
S. Bhattacharya, et al., "Optimizing Three Phase Current Regulators for Low Inductance Loads", IEEE-IAS Conf. Rec., pp. 2357-2364, 1995.
Subhashish Bhattacharya & Deepak Divan, "Synchronous Frame Based Controller Implementation for a Hybrid Series Active Filter System", IEEE-IAS Con. Rec., pp. 2531-2540, 1995.
S. Bhattacharya, et al., "Active Filter Solutions for Utility Interface", IEEE-ISIE Conf. Rec., pp. 53-63, 1995.
Subhashish Bhattacharya & Deepak Divan, "Design and Implementation of a Hybrid Series Active Filter System", IEE PESC Conf. Rec., pp. 189-195, 1995.
Bhattacharya Subhashish
Cheng Po-Tai
Divan Deepakraj M.
Hecker Stuart N.
Wisconsin Alumni Research Foundation
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