Dynamic voltage stability constrained ATC calculation by a QSS approach

Y. Cheng, T. S. Chung, C. Y. Chung, C. W. Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)


The evaluation of Available Transfer Capability (ATC) in deregulated power system should take into account thermal limits, transient, steady-state and dynamic angle stability as well as the voltage stability limit. The consideration of voltage stability in the determination of ATC, however, was not well researched before. On the other hand, under the power market environment, voltage instability becomes a more important consideration in many countries in recent years, especially when following a large disturbance in a heavily stressed power system over long distances. A new ATC determination scheme using Quasi-steady-state (QSS) approximation is proposed in this paper and implemented on a test system. The performance of the QSS approximation is also compared with the Full-Time-Scale (FTS) simulation. From the results, it is shown that the proposed scheme can evaluate ATC with dynamic voltage stability constraints accurately and the calculation speed is accelerated considerably to meet the real-time requirement.

Original languageEnglish
Pages (from-to)408-412
Number of pages5
JournalInternational Journal of Electrical Power and Energy Systems
Issue number6
Publication statusPublished - Jul 2006


  • Available transfer capability (ATC)
  • Quasi-steady-state (QSS) approximation
  • Voltage stability

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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