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A simple direct method for fast transient stability assessment of large power systems

Journal Article · · IEEE Trans. Power Syst.; (United States)
DOI:https://doi.org/10.1109/59.192890· OSTI ID:6163394
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A method for on-line transient stability assessment of large power systems is proposed. It consists in 1) replacing the multimachine system by a two-machine dynamic equivalent further amenable to a one-machine-infinite-bus system; 2) reducing the stability problem to a sole algebraic equation, devised from the well-known equal area criterion, or equivalently from the Liapunov direct criterion; 3) using this equation to derive one-shot stability analysis strategies. Moreover, a technique for system admittance matrix reduction is developed, which proves particularly efficient, especially for large systems and multiple contingency evaluation. The method's main appeal is rapidity: compared to the most efficient direct criterion, it is found to be about one order of magnitude faster. Other attractive features are flexibility and ability to encompass various simulation conditions. Extensions to on-line sensitivity analysis and control are also suggested.
Research Organization:
Dept. of Electrical Engineering, Univ. of Liege, Sart-Tilman, B-4000 Liege (BE)
OSTI ID:
6163394
Journal Information:
IEEE Trans. Power Syst.; (United States), Journal Name: IEEE Trans. Power Syst.; (United States) Vol. 3:2; ISSN ITPSE
Country of Publication:
United States
Language:
English

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Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
42 ENGINEERING
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
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COMPUTERIZED CONTROL SYSTEMS
COMPUTERIZED SIMULATION
CONTROL SYSTEMS
EFFICIENCY
ELECTRICAL TRANSIENTS
ENERGY SYSTEMS
EQUIPMENT PROTECTION DEVICES
LYAPUNOV METHOD
MATRICES
ON-LINE SYSTEMS
POWER SYSTEMS
SENSITIVITY ANALYSIS
SIMULATION
STABILITY
TRANSIENTS
VOLTAGE DROP