Analysis of transient stability enhancement of LV-connected induction microgenerators by using resistive-type fault current limiters

Abdulla Emhemed, R.M. Tumilty, Nand Singh, G.M. Burt, J.R. McDonald

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

In this paper an analytical method by which the transient stability of an induction machine is maintained regardless of the fault clearance times is introduced. The method can be applied in order to improve the transient stability of a large penetration of low-voltage (LV) connected microgeneration that can be directly interfaced by single-phase induction generators within domestic premises. The analysis investigates the effectiveness of using resistive-type superconducting fault current limiters (RSFCLs) as remedial measures to prevent the microgenerators from reaching their speed limits during remote faults, and hence improving their transient stability. This will prevent unnecessary disconnection of a large penetration of LV-connected microgeneration and thus avoiding the sudden appearance of hidden loads, and unbalanced voltage conditions. The minimum required value of a resistive element of RSFCL for mitigating the transient instability phenomena of LV-connected microgeneration based on the system and connected machine parameters is determined. The analytical method has been validated by conducting informative transient studies by using detailed models of a small microwind turbine with constant mechanical output interfaced directly within residential dwellings by a single-phase induction generator, a transient model of resistive superconducting fault current limiter (RSFCL), and a typical suburban distribution network with residential loads. All the models are developed in the time-domain PSCAD/EMTDC dynamic simulation.
Original languageEnglish
Pages (from-to)885-893
Number of pages9
JournalIEEE Transactions on Power Systems
Volume25
Issue number2
DOIs
Publication statusPublished - May 2010

Keywords

  • distribution networks
  • fault current limiters
  • single-phase induction generators
  • transient stability

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