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《Automation of Electric Power Systems》 1993-07
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Xue Yusheng (Nanjing Automation Research Institute)  
The dynamic equal area criterion (DEEAC) proved theoretically to be both sufficient and necessary conditions for multimachine system stability in this paper, in a sence of multi- step Taylor expansion' s accuracy. This proof is independent of both swing modes and modeling sophistication. Recent achievements are reported on: (1) Safe filtering of cases with CCTs larger than a predefined threshold; (2) reliably finding a start condition for EEAC under unstable cases where no candidate clusters of small size might lose stability; (3) good results for multi -cluster cases; (4) reliable identification of large errors; (5) reliable identification of multi-swing instability. Two kinds of strategies to incorporate detailed models in DEEAC are also suggested with sound reasoning and successful practice.
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