Current control method and apparatus for active power filters

Details Current control method and apparatus for active power filters Current control method and apparatus for active power filters

2005-09-06

2005-09-06

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S553000

Reexamination Certificate

active

06940341

ABSTRACT:
An active filtering method and apparatus for controlling a current generator that sources/sinks an APF current for compensating polluting harmonics on a power line connecting a power source and a load. A feedback loop regulates the APF current by sensing the current output of the current generator and the current flowing through the load. The feedback loop controls the current generator to force the APF current to track a current command signal to effectively limit the APF current to a safe value within the limitations of a particular design.

REFERENCES:
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patent: 6657322 (2003-12-01), Skibinski et al.
Smedley, Keyue M.,Unified Constant-Frequency Integration Control of Active Power Filters—Steady-State and Dynamics, IEEE Transactions on Power Electronics, vol. 16, No. 3, May 2001, pp. 428-436.
Pöttker, Fabiana et al.,Single-Phase Active Power Filters for Distributed Power Factor Correction, 2000 IEEE, pp. 500-505.
Singh, Bhim et al.,A Review of Active Filters for Power Quality Improvement, IEE Transactions on Industrial Electronics, vol. 46, No. 5, Oct. 1999, pp. 960-971.
Quiao, Chongming et al.,A Comprehensive Analysis and Design of a Single Phase Active Power Filter with Unified Constant-frequency Integration Control, pp. 1-7.
E. Dallago et al., Single-phase active power filter with only line current sensing, Electronic Letters Jan. 20, 2000, vol. 36, No. 2, pp. 105-106.

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