Boots – shoes – and leggings
Patent
1990-05-07
1996-01-09
Trans, Vincent N.
Boots, shoes, and leggings
361 59, 361 62, 361111, 361115, 307 39, 307132EA, 307 97, H02H 306
Patent
active
054834627
ABSTRACT:
A fast and reliable method for determining power system transient stability is presented for on-line power system dynamic security assessment. This method is based on the direct (Lyapunov theory) approach controlling the unstable equilibrium point (UEP). Lyapunov technique, however, cannot be used on-line, since calculating the controlling UEP is a computational intensive problem, even for a computer. The invention comprises determining the controlling UEP of a reduced system and relates the controlling UEP of the reduced system to the controlling UEP of the original system. The invention has a sound theoretical basis. The invention eliminates the difficulty of having to find the controlling UEP. The method of the invention determines the constant energy region that surrounds the controlling UEP of the original system. This region is used to approximate the stability region boundary intersection point that a particular fault trajectory will traverse.
REFERENCES:
patent: 3903402 (1975-09-01), Petit et al.
patent: 4084103 (1978-04-01), Burns, III et al.
patent: 4541058 (1985-09-01), Andow et al.
patent: 4577254 (1986-03-01), Yamawa
patent: 4641248 (1987-02-01), Suzuki et al.
patent: 4680706 (1987-07-01), Bray
patent: 4785405 (1988-11-01), Hasegawa et al.
patent: 4800509 (1989-01-01), Nimmersjo
patent: 4803635 (1989-02-01), Andow
patent: 4845594 (1989-07-01), Wilkerson
patent: 4853175 (1989-08-01), Book, Sr.
patent: 4868410 (1989-09-01), Nakamura
patent: 4974140 (1990-11-01), Iba et al.
patent: 4987513 (1991-01-01), Shelley
EPRI Project 2206-3 Final Report, Aug., 1985 "Transient Stability Program Output Analysis".
EPRI Project 2206--Final Report, Dec. 1986 "Direct Analysis of Transient Stability for Large Power System".
EPRI Project 4000-18 Final Report, Jul. 1991 "Evaluation of Transient Energy Function Method Software for Dynamic Security Analysis".
EPRI Project 2206-5 Final Report, Sep. 1987 "Extending Applications of the Transient Energy Function Method".
Chiang et al., "Foundations of the Potential Energy Boundary Surface Method for Power System Transient Analysis," IEEE Transactions on Circuits and Systems, vol. 35, No. 6, Jun. 1988, pp. 712-728.
Chiang et al., "Foundations of Direct Methods for Power System Transient Stability Analysis," IEEE Transactions on Circuits and Systems, vol.-CAS 34, No. 2, Feb. 1987.
Varaiya et al., "Direct Methods for Transient Stability Analysis of Power Systems: Recent Results," Proceedings of the IEEE, vol. 73, No. 12, Dec. 1985.
Cornell Research Foundation Inc.
Trans Vincent N.
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