Reactive power optimization with adaptive excitation control

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system

Reexamination Certificate

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C318S712000, C700S297000, C700S298000, C322S059000

Reexamination Certificate

active

06975946

ABSTRACT:
Reactive power (VAR) consumption in a power plant or facility having synchronous machines is adaptively controlled in an automated manner. Electrical parameters of the plant are dynamically monitored during plant operation, and the overall plant power system is brought to an optimum operating point under control of a microprocessor-based power measurement system. The microprocessor-based power measurement system adaptively changes the excitation system of synchronous machines in the plant based on results of monitoring. The excitation systems of the synchronous machines may be adjusted to be constant bus voltage, constant reactive power, or constant power factor, according to optimum system performance requirements. The power measurement system also assists in avoiding problems in voltage regulation during increased load demand conditions, such as when starting large electrical motors or energizing large transformers in the system.

REFERENCES:
patent: 3936722 (1976-02-01), Goto et al.
patent: 4714869 (1987-12-01), Onitsuka
patent: 4982147 (1991-01-01), Lauw
patent: 5321308 (1994-06-01), Johncock
patent: 5355083 (1994-10-01), George et al.
patent: 5440222 (1995-08-01), Tanaka et al.
patent: 5483147 (1996-01-01), Ilic et al.
patent: 5541510 (1996-07-01), Danielson
patent: 6208120 (2001-03-01), Gibbs
patent: 6232751 (2001-05-01), Farr et al.
patent: 6265852 (2001-07-01), Kitamura et al.
patent: 6323618 (2001-11-01), Kitamura et al.
patent: 6329773 (2001-12-01), Xia et al.
patent: 6762592 (2004-07-01), Noguchi et al.
patent: 6847184 (2005-01-01), Noguchi et al.
Schaefer, “Excitation Control of the Synchronous Motor”, IEEE, 1998.
Eberly et al., “Voltage Versus Var/Power-Factor Regulation on Synchronous Generators”, IEEE, 2002.
Majed M. Al Hamrani, Reactive Power Optimization Using Adaptive Excitation Control of Synchronous Motors, Thesis, Jun. 25, 2002, Oregon State University.
Kevin D. Becker, Power Factor Correction With Synchronous Machines, EC&M, Dec., 1993, pp. 47-48, 50, 52. and 56-57.
M. M. Al-Hamrani, A. Von Jouanne, A. Wallace, Power Factor Correction in Industrial Facilities Using Adaptive Excitation Control of Synchronous Machines, IEEE, Jun. 17, 2002.
Stanley R. Shilling, P.E., Programmable Logic Controller for Synchronous Motors, Saudi Aramco Engineering Report —SAER-5612, Jun. 1994, Dhahran.
Liu Nian; Teng Fusheng, The New Intelligent Monitoring Method for Operating States of Large Generator Units, IEEE Power Engineering Society Winter Meeting, vol. 1, Jan. 2000, pp.
Montero, L.R.R., Monitoring and Control System Based on Microcomputer for Synchronous Generator, IEEE Transactions on Energy Conversion, vol. 14, No. 4, Dec. 1999.

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