Multi-level active filter

Details Multi-level active filter Multi-level active filter

2006-05-16

2008-07-29

Riley, Shawn (Department: 2838)

Electrical transmission or interconnection systems

With harmonic filter or neutralizer

Reexamination Certificate

active

07405498

ABSTRACT:
A multi-phase active filter includes a group of power cells electrically connected in a three-phase configuration, a precharging circuit, and a controller that controls the voltage delivered to the plurality of power cells. Each power cell includes an inverter having a pair of direct current (DC) terminals, at least one capacitor electrically connected in parallel with the inverter, and an energy dissipating circuit that is electrically connected in parallel with the inverter. The energy dissipating circuit of each power cell self-regulates DC voltage within the cell.

REFERENCES:
patent: 5625545 (1997-04-01), Hammond
patent: 5638263 (1997-06-01), Opal et al.
patent: 5986909 (1999-11-01), Hammond et al.
patent: 6014323 (2000-01-01), Aiello et al.
patent: 6075350 (2000-06-01), Peng
patent: 6262555 (2001-07-01), Hammond et al.
patent: 6377478 (2002-04-01), Morishita
patent: 6411530 (2002-06-01), Hammond et al.
patent: 6417644 (2002-07-01), Hammond et al.
patent: EP0911951 (1999-04-01), None
Hikeaki Fujita et al., “A practical approach to switching—loss reduction in a large-capacity static var compensator based on voltage-source inverters”; IEEE Transactions on Industry Applications, IEEE Service Center, Piscataway, NJ, US; vol. 36, No. 5, Sep. 2000, p. 1396-1404.
Peng F et al., Cascade multilevel inverters for utility applications , Proceedings of the IECON '97 : 23rd International Conference on Industrial Electronics, Control and Instrumentation. New Orleans, Nov. 9-14, 1997, Proceedings of IEEE IECON: International Conference on Industrial Electronics, Control and Instrum, vol. 2, No. 9, 1997; pp. 437-442.
Geza Joos et al., “Direct-coupled Multilevel Cascaded Series VAR Compensators”, IEEE Industry Application Society Annual Meeting, New Orleans, Louisiana, Oct. 5-9, 1997, pp. 1608-1615.
Rolf Grunbaum et al., “Energy and Environmental Savings in Steel Making by Means of SVC Light”, Electric Furnace Conference Proceedings, 2000, pp. 65-75.
Hirofumi Akagi, “New Trends in Active Filers for Power Conditioning”, IEEE Transactions on Industry Applications, vol. 32, No. 6, Nov./Dec. 1996, pp. 1312-1322.
Miguel G. Lopez et al., “Performance Analysis of a Hybrid Asymmetric Multilevel Inverter for High Voltage Active Power Filter Applicaitons”, IEEE, 2003, pp. 1050-1055.
Sunt Srianthumrong et al., “A Medium-Voltage Transformerless AC/DC Power Conversion System Consisting of a Diode Rectifier and a Shunt Hybrid Filter”, IEEE, 2002, 8 pp.

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