Apparatus, method and computer program product for tracking...

Oscillators – With frequency calibration or testing

Reexamination Certificate

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C322S017000, C323S205000

Reexamination Certificate

active

07456695

ABSTRACT:
An apparatus for rapidly tracking fundamental frequency information in the signal of an electric grid is a cross-coupled phase-lock loop filter (CCPLL) that includes the use of a phase-lock-loop (PLL) apparatus having a plurality individual filters, wherein an input for a first filter in the plurality of individual filters comprises the signal of the electric grid and an output signal from at least a second filter in the plurality of individual filters. A method for using the CCPLL includes applying a signal to the CCPLL and monitoring the output of the CCPLL. Use of the CCPLL may be accomplished or modeled via computer instructions stored on machine readable media.

REFERENCES:
patent: 6757350 (2004-06-01), Chesavage
patent: 6850426 (2005-02-01), Kojori et al.
patent: 6853940 (2005-02-01), Tuladhar
patent: 6864595 (2005-03-01), Wall
patent: 6919650 (2005-07-01), Deng
patent: 6973145 (2005-12-01), Smith et al.
patent: 7233129 (2007-06-01), Erdman et al.
patent: 2003/0165036 (2003-09-01), Tuladhar
patent: 2003/0218887 (2003-11-01), Kojori et al.
patent: 2003/0222507 (2003-12-01), Deng
patent: 2005/0122083 (2005-06-01), Erdman et al.
patent: 1561946 (2005-01-01), None
patent: WO 03/094334 (2003-11-01), None
patent: WO 03/094334 (2003-11-01), None
patent: WO 03/103112 (2003-12-01), None
Vikram Kaura, et al.; Operation of a Phase Locked Loop System Under Distorted Utility Conditions; IEEE Transactions on Industry Applications, vol. 33, No. 1, Jan./Feb. 1997; pp. 58-63.
M.R. Iravani, et al.; Online estimation of steady state and instantaneous symmetrical components; IEE Proc.-Gener. Transm. Distrib., vol. 150, No. 5, Sep. 2003; pp. 616-622.
Changjiang Zhan, et al.; Software Phase-Locked Loop applied to Dynamic Voltage Restorer (DVR); 2001 IEEE; pp. 1033-1038.
Dragan Jovcic; Phase Locked Loop System for Facts; 2003 IEEE; pp. 1116-1124.
Xiaoming Yuan, et al.; Stationary-Frame Generalized Integrators for Current Control of Active Power Filters With Zero Steady-State Error for Current Harmonics of Concern Under Unbalanced and Distroted Operating Conditions; 2002 IEEE; pp. 523-532.
Hilmy Awad, et al.; Tuning Software Phase-Locked Loop for Series-Connected Converters; 2005 IEEE; pp. 300-308.
Hong-Seok Song, et al.; Very Fast Phase Angle Estimation Algorithm for a Single-Phase System having Sudden Phase Angle Jumps; 2002 IEEE; pp. 925-931.

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