Using trajectory sensitivity analysis to find suitable locations of series compensators for improving rotor angle stability

Amin Nasri, Robert Eriksson, Mehrdad Ghandhar

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This paper proposes an approach based on trajectory sensitivity analysis (TSA) to find most suitable placement of series compensators in the power system. The main objective is to maximize the benefit of these devices in order to enhance the rotor angle stability. This approach is formulated as a two-stage problem, whose first-stage describes prior to fault occurrence and whose second-stage epresents the power system behavior involving a set of severe faults. The first-stage focuses on small signal stability, while the second-stage deals with transient stability of power system. In this vein, the trajectory sensitivities of the rotor angles of generators with respect to the reactances of transmission lines are calculated. Two equivalent rotor angles are introduced to find stability indices corresponding to the first- and the second-stage of the proposed approach. Numerical results from IEEE 10-machine 39-bus test system demonstrate the usefulness of the proposed method.

Original languageEnglish
JournalElectric Power Systems Research
Volume111
Number of pages8
ISSN0378-7796
DOIs
Publication statusPublished - 2014

Keywords

  • Trajectory sensitivity analysis (TSA)
  • Transient stability
  • Small signal stability
  • Flexible AC transmission system (FACTS)
  • Critical clearing time (CCT)
  • Devices

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