Boots – shoes – and leggings
Patent
1986-11-03
1989-03-07
Lall, Parshotam S.
Boots, shoes, and leggings
364480, 323210, H02J 318
Patent
active
048112364
ABSTRACT:
In order to maintain low telephone interference (IT factor) during its normal operation and to establish rapid-post-fault voltage support to preserve the integrity of electric power transmission lines in the presence of degraded system impedance and harmonic instability, amplitude detection in a transmission voltage regulator (static VAR generator, SVG) is provided based on real time conventional, or fast, Fourier analysis, data samples being used to establish the fundamental voltage amplitude and collected during a specific, frequency tracking sliding window that precedes the amplitude reading by one line voltage cycle of the transmission line. The number of samples in the window is an integer multiple of the line frequency and, in the case of conventional analysis, the pulse number of the switching power circuit is used in the SVG. The amplitude value is updated after each sampling by shifting (sliding) the one cycle sample data base in a first in - first out manner.
REFERENCES:
patent: 4057756 (1977-11-01), Ley et al.
patent: 4100604 (1978-07-01), Perreault
patent: 4125895 (1978-11-01), Buhlmann
patent: 4172234 (1979-10-01), Gyugyi et al.
patent: 4229795 (1980-10-01), Vieweg et al.
patent: 4275452 (1981-06-01), White
patent: 4319329 (1982-03-01), Girgis et al.
patent: 4455612 (1984-06-01), Girgis et al.
patent: 4463432 (1984-07-01), Carter, II
patent: 4527101 (1985-07-01), Zavis et al.
patent: 4630228 (1986-12-01), Tarczy-Hornock et al.
Elliott, "Fast Transforms: Algorithms, Analyses, Applications", Academic Press, 1982.
Gyugi et al., "Transmission System Static VAR Control", Electric Power Research Institute--Westinghouse Electric Corp., Dec. 1982.
E. A. Udren, "Applied Protective Relaying", Westinghouse Electric Corp. Relay-Instrument Division, Chapter 21.
Abbondanti Alberto
Brennen Michael B.
Lall Parshotam S.
Lorin C. M.
Trans V. N.
Westinghouse Electric Corp.
LandOfFree
Transmission line voltage detector for static VAR generator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmission line voltage detector for static VAR generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission line voltage detector for static VAR generator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1674726