Security diagnosis by means of tie-line flow fluctuation monitoring

H. Saitoh, J. Toyoda, O. Ishioka, Y. Kobayashi

Research output: Contribution to journalConference articlepeer-review


This paper proposes that the line flow fluctuation can be used as a new security factor to assess the total system damping of the slow natural mode. The line flow fluctuation is evaluated by partitioning its power spectrum into two major oscillatory modes. The 24 data points observed at the tie line in the central-east of Japan, are used to extract the features of the fluctuations. A significant result is a droop characteristic of the fluctuation spectrum with respect to the system demand. The system status can be separated into the SECURE and ALERT state by using the above characteristic. The statistical investigation has been done for identifying the local damping effect.

Original languageEnglish
Pages (from-to)227-231
Number of pages5
JournalIFAC Proceedings Series
Issue number9
Publication statusPublished - 1989
EventPower Systems Modelling and Control Applications - Selected Papers from the IFAC Symposium - Brussels, Belg
Duration: 1988 Sept 51988 Sept 8

ASJC Scopus subject areas

  • Engineering(all)


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