The Development of a Coordinated Anti-Islanding Protection for Collector Systems With Multiple Distributed Generation Units

Saleh S. A., ÖZKOP E., Aljankawey A. S.

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, vol.52, no.6, pp.4656-4667, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 6
  • Publication Date: 2016
  • Doi Number: 10.1109/tia.2016.2594231
  • Journal Name: IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4656-4667
  • Keywords: Distributed generation units (DGUs), instantaneous three phase apparent powers, the islanding condition, wavelet packet transform (WPT), d-q-axis reference frame, PERFORMANCE, VOLTAGE
  • Karadeniz Technical University Affiliated: Yes

Abstract

This paper presents a coordinated anti-islanding protection for collector systems with multiple distributed generation units (DGUs). The presented anti-islanding protection is established based on processing the d−q-axis components of the instantaneous three phase apparent powers (sd and sq), determined at the pointof- common-coupling, using the wavelet packet transform (WPT). Processing sd and sq by using WPT allows the extraction of low and high frequency sub-band contents. The contents of the high frequency sub-band are used to detect and distinguish islanding events, and contents of the low and high frequency sub-bands are employed to define a coordination index, which is used to identify the islanded DGU(s). The presented anti-islanding protection is implemented for off-line testing using data obtained from a laboratory collector with four different DGUs. Off-line test results demonstrate accurate, fast, and reliable responses to islanding and non-islanding event(s), accurate identification of islanded DGUs, along with negligible sensitivity to levels of power delivery to the collector system.

This paper presents a coordinated anti-islanding protection for collector systems with multiple distributed generation units (DGUs). The presented anti-islanding protection is established based on processing the d-q-axis components of the instantaneous three phase apparent powers (s(d) and s(q)) determined at the point-of-common-coupling using the wavelet packet transform (WPT). Processing s(d) and s(q) by using WPT allows the extraction of low-and high-frequency sub-band contents. The contents of the high-frequency sub-band are used to detect and distinguish islanding events, and contents of the low-and high-frequency sub-bands are employed to define a coordination index, which is used to identify the islanded DGU(s). The presented anti-islanding protection is implemented for off-line testing using data obtained from a laboratory collector with four different DGUs. Off-line test results demonstrate accurate, fast, and reliable responses to islanding and nonislanding event(s), and accurate identification of islanded DGUs along with negligible sensitivity to levels of power delivery to the collector system.