A Q-f droop curve for facilitating islanding detection of inverter-based distributed generation

Research output: Contribution to journalArticlepeer-review

122 Scopus citations

Abstract

This paper presents a new method for islanding detection of distributed generation (DG) inverter that relies on analyzing the reactive power versus frequency (Q-f) characteristic of the DG and the islanded load. The proposed method is based on equipping the DG interface with a Q-f droop curve that forces the DG to lose its stable operation once an islanding condition occurs. A simple passive islanding detection scheme that relies on frequency relays can then be used to detect the moment of islanding. The performance of the proposed method is evaluated under the IEEE 1547 and UL 1741 antiislanding test configuration. The studies reported in this paper are based on time-domain simulations in the power systems computer-aided design (PSCAD)/EMTDC environment. The results show that the proposed technique has negligible nondetection zone and is capable of accurately detecting islanding within the standard permissible detection times. In addition, the technique proves to be robust under multiple-DG operation.

Original languageBritish English
Pages (from-to)665-673
Number of pages9
JournalIEEE Transactions on Power Electronics
Volume24
Issue number3
DOIs
StatePublished - 2009

Keywords

  • Distributed generation (DG)
  • Inverter
  • Islanding
  • Over-/underfrequency
  • Over-/undervoltage

Fingerprint

Dive into the research topics of 'A Q-f droop curve for facilitating islanding detection of inverter-based distributed generation'. Together they form a unique fingerprint.

Cite this