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A novel hybrid islanding detection method for inverter-based DGs using SFS and rOCOF

Khodaparastan, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/TPWRD.2015.2406577
  3. Abstract:
  4. This paper is aimed at proposing a new hybrid method for the islanding detection of distributed-generation (DG) units. Hybrid method operation is based on the combination of an active and a passive method, for which the optimized Sandia frequency shift (SFS) method is used as the selected active method, and rate of change of frequency relay (ROCOF) is used as the passive method. In order to demonstrate the effectiveness of the proposed technique on islanding detection, several simulation studies based on IEEE 1547 and UL1741 anti-islanding test requirements are carried out. The evaluation of simulation results reveals that the control system, based on the proposed hybrid algorithm, meets the DG islanding protection requirements efficiently. Moreover, it will be demonstrated that the proposed hybrid method is capable of accurately operating under multiple DG units, load switching in the grid-connected mode, as well as different load quality factor conditions. © 1986-2012 IEEE
  5. Keywords:
  6. Inverter-based distributed generation (DG) ; Islanding detection technique ; Multi DG system ; Negligible nondetection zone (NDZ) ; Power-quality improvement of system ; Rate of change of frequency (ROCOF) relay ; Sandia frequency-shift (SFS) method ; Electric inverters ; DG system ; Frequency shift ; Hybrid method ; Inverter-based ; Islanding detection ; Non detection zones ; Power quality improvement ; Rate-of-change-of-frequency relays ; Distributed power generation
  7. Source: IEEE Transactions on Power Delivery ; Volume 32, Issue 5 , 2017 , Pages 2162-2170 ; 08858977 (ISSN)
  8. URL: https://ieeexplore.ieee.org/document/7047930