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https://jmstt.ntou.edu.tw/journal/vol26/iss4/1/ "ANALYSIS OF POWER SYSTEM LOW FREQUENCY OSCILLATION WITH EMPIRICAL MODE" by Chia-Liang Lu, Chia-Yu... The low frequency oscillation (LFO) in power systems often consists of composite responses of various oscillation modes. Thus a direct analysis of LFO for... low frequency oscillationpower systemlu yuanalysisempirical