Electric power conversion systems – Current conversion – Having plural converters for single conversion
Reexamination Certificate
2006-05-25
2009-08-18
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
Having plural converters for single conversion
C363S095000
Reexamination Certificate
active
07577006
ABSTRACT:
Non-linear frequency droop control for isochronous frequency operation of parallel inverters includes generating a droop constant corresponding to the power level of the given inverter for maintaining the predetermined frequency range of the given inverter; generating the droop from the given inverter power level and the droop constant and calculating in response to the droop, the incremental shift in the output voltage waveform of a given inverter operating in a predfreytermined limited frequency range to enable current sharing among the inverters.
REFERENCES:
patent: 5745356 (1998-04-01), Tassitino, Jr. et al.
patent: 6693409 (2004-02-01), Lynch et al.
patent: 6803679 (2004-10-01), Luo et al.
patent: 7333352 (2008-02-01), Petter et al.
Laszlo Balogh,Paralleling Power- Choosing and Applying the Best Technique for Load Sharingpp. 6-1-6-30, Texas Instruments (2003).
Shinzo Tamai et al.,Parallel Operation of Digital Controlled UPS System, IECON, pp. 326-334 vol. 1 (1991).
A. Taladhar et al.,Parallel Operation of Single Phase Inverter Modules With No Control Interconnections, IEEE APEC, pp. 94-100, vol. 1 (1997).
Shiguo Luo, et al.,A Classification and Evaluation of Paralleling Methods for Power Supply Modules, IEEE PESC, (1999).
Namho Hur et al.,A Robust Load-Sharing Control Scheme for Parallel-Connected Multisystems, IEEE Transactions on Industrial Electronics, vol. 47 No. 4 (Aug. 2000).
Ernane Antonio Coelho et al.,Small Signal Stability for Parallel Connected Inverters in Stand-Along AC Supply Systems, IAS, vol. 4 pp. 2345-2352 (2000).
Uffe Borup Jensen et al.,Sharing of Nonlinear Load in Parallel Connected Three-Phase Converters, IEEE, pp. 2338-2344 (2000).
Y. B. Byun et al.,Parallel Operation of Three-Phase UPS Inverters by Wireless Load Sharing Control, Telecon Energy Conference, INTELEC, pp. 526-532 (2000).
S. J. Chiang et al.,Parallel Control of the UPS Inverters With Frequency-dependent Droop Scheme, PECS, vol. 2, pp. 957-961 (2001).
Jong-Woo Choi et al.,A New Compensation Strategy Reducing Voltage/Current Distortion in PWM VSI Systems Operating with Low Output Voltages, IEEE Transactions on Industry Application, vol. 31, (Sep./Oct. 1995).
Mukul Chandorkar,Uninterruptible Power Supplies, ABB Corporate Research, Ltd. CH-5405 Baden-Dattwil, Switzerland.
Tore Skjellnes et al.,Load Sharing for Parallel Inverters Without Communication, NORPIE, Nordic Workshop on Power and Industrial Electronics, (Aug. 12-14, 2002).
Ali Keyhani et al.,Parallel Operation of Power Converters for Applications to Distributed Energy Systems, The Ohio State University, Department of Electrical Engineering, Columbus, Ohio 43210, pp. 1-6.
Jung-Won Kim et al.,A Novel Droop Method for Converter Parallel Operation, IEEE Transactions on Power Electronics, vol. 17, No. 1, (Jan. 2002).
Hoff E. Skjellnes et al.,Paralleled Three-Phase Inverters, Department of Electrical Power Engineering, Norweigian University of Science and Technology, NTNU, Norway (2004).
K. De Brabandere et al.,A Voltage and Frequency Droop Control Method for Parallel Inverters, 2004 35thIEEE Power Electronics Specialists Conference, Germany, pp. 2501-2507 (2004).
Mohammad N. Marwali et al.,Control of Distributed Generation Systems—Part II: Load Sharing Control, IEEE Transactions of Power Electronics, vol. 19, No. 6 (Nov. 2004).
Xikun Chen et al.,Research on Parallel Operation of High Frequency UPSs, Department of Electric and Electronic Engineering, Huazhong University of Science and Technology, Department of Control Engineering, Zhengzhou University of Light Industry, Wuhan, Hubei Province, P.R. China, PESC, p. 276-281 (2005).
Zhihong Ye,Modeling and Control of Parallel Three-Phase PEM ConvertersDissertation submitted to the Faculty of the Virginia Polytechnic Institute and State University (Sep. 15, 2000).
Zhihong Ye,Design of Parallel Sources in DC Distributed Power System by Using Gain-Scheduling Technique Center for Power Electronics Systems(CPES) Virginia Polytechnic Institute and State University, IEEE 1999.
Yao et al., “Development of Communicationless Hot-Swap Paralleling for Single-Phase UPS Inverters based on Adaptive Droop Method”, IEEE, Feb. 15-19, 2009, Applied Power Electronics Conference and Exposition, 2009, APEC Fourth Annual IEEE, pp. 1283-1287.
Azure Dynamics Corp.
Han Jessica
Iandiorio Teska & Coleman
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