Transmission Grid Topology Control Using Critical Switching Flow Based Preventive Stabilizing Redispatch

Tian Lan, Wenzong Wang, Garng Morton Huang

Research output: Contribution to journalArticle

3 Citations (Scopus)


Transmission grid topology control makes power systems more flexible and efficient. However, a line switching action itself may cause transient instability since a large flow disturbance may be involved. In this paper, a critical switching flow (CSF) concept is developed and an associated preventive stabilizing redispatch scheme is proposed to provide control guidelines for line switching actions to prevent instability and enhance transient stability for the system. The CSF is calculated in the day-ahead stage using a two-stage Monte Carlo algorithm, in which the uncertainties of generations and loads are considered and the worst case in the system is identified statistically. The obtained information is then used in the proposed scheme in the operation stage. Selected generators are dispatched before a switching action to ensure system stability. The IEEE reliability test system, the modified IEEE-118 bus system and the Texas 2000 system are used to demonstrate the effectiveness and scalability of the proposed algorithm and scheme.

Original languageEnglish
JournalIEEE Transactions on Power Systems
Publication statusAccepted/In press - 14 Sep 2017
Externally publishedYes



  • critical switching flow
  • Generators
  • Power system stability
  • preventive stabilizing redispatch
  • Stability criteria
  • Switches
  • Topology control
  • Transient analysis
  • transient stability

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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