Generation Rescheduling Methods to Improve Power Transfer Capability Constrained by Small-Signal Stability

C. Y. Chung, Lei Wang, Frederic Howell, Prabhashankar Kundur

Research output: Journal article publicationJournal articleAcademic researchpeer-review

162 Citations (Scopus)


Small-signal stability, often in the form of low frequency oscillations, has been found to be the limiting factor when determining power transfer capabilities in a number of power systems. This paper proposes a new strategy to improve the power transfer capability constrained by small-signal stability by appropriately rescheduling generation based on sensitivity analysis. In the proposed strategy, a small-signal stability index, which can be computed quickly and reliably, is used to determine the small-signal security status of a system and also for the purpose of contingency screening. Two sensitivity-based dispatch methods are proposed to reschedule the generation in order to maximize power transfer subject to the small-signal stability constraint under a set of selected contingencies. The effectiveness of the proposed methods is demonstrated by comparing with other generation dispatch methods on a real power system model.

Original languageEnglish
Pages (from-to)524-530
Number of pages7
JournalIEEE Transactions on Power Systems
Issue number1
Publication statusPublished - Feb 2004


  • Eigenvalue
  • Optimization
  • Power system scheduling
  • Security
  • Sensitivity
  • Small-signal stability

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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