Data processing: generic control systems or specific application – Specific application – apparatus or process – Electrical power generation or distribution system
Reexamination Certificate
2011-06-07
2011-06-07
Patel, Ramesh B (Department: 2121)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Electrical power generation or distribution system
C318S621000, C318S729000, C324S098000
Reexamination Certificate
active
07957844
ABSTRACT:
A method for stabilization of the power balance in an electric power system including a number of nodes. An instantaneous value of the mains frequency of the electric power system is sensed. In dependence on the frequency deviation of the instantaneous value from a reference frequency value, a selected part of the electric power system, connected in a node, is disconnected in the node. A voltage amplitude value is sensed in the node. A measure of the magnitude of the deviation of the voltage amplitude value from a reference amplitude value is formed. A time lag is formed in dependence on the measure of the magnitude. The part of the electric power system is disconnected in dependence on the time lag.
REFERENCES:
patent: 4183072 (1980-01-01), Takagi et al.
patent: 4656413 (1987-04-01), Bourbeau
patent: 4785405 (1988-11-01), Hasegawa et al.
patent: 5225712 (1993-07-01), Erdman
patent: 6519537 (2003-02-01), Yang
patent: 6525504 (2003-02-01), Nygren et al.
patent: 6670721 (2003-12-01), Lof et al.
patent: 6678134 (2004-01-01), Sugiura et al.
patent: 7076592 (2006-07-01), Ykema
patent: 7248986 (2007-07-01), Klijn et al.
patent: 1721707 (1992-03-01), None
patent: 1746464 (1992-07-01), None
patent: WO 8908342 (1989-09-01), None
Lind et al.,“Distribution System Modeling for Voltage Stability Studies”, 1995 IEEE p. 1677-1682.
Fillatre et al., “A Power Tool for Dynamic Simulation of Unbalanced Phenomena”, 1997 IEEE p. 526-531.
Kezunovic et al., “An Expert System for Transmission Substation Event Analysis” 1993 IEEE p. 1942-1949.
Okafor et al., Power System Stabilizer for the Nigerian Power System—Design and Simulation 1999 IEEE p. 803-807.
“IEEE Recommended Practice for Monitoring Electrical Power Quality”, 1995, IEEE Standards Board, 76 pages.
Prabha Kundur; Power System Stability and Control; Underfrequency Load Shedding; Jan. 1, 1994; pp. 623-626; McGraw-Hill Professional.
Karlsson Daniel
Messing Lars
ABB AB
Franklin Eric J.
Patel Ramesh B
Stevens Thomas
Venable LLP
LandOfFree
Device and a method for power balancing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device and a method for power balancing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and a method for power balancing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2705433