Current-based Islanding Detection Scheme in Presence of Distributed Generations

Abstract

In this article, a new islanding detection technique based on dq0 transformation is presented for the power system network containing distributed generators. The proposed technique is based on the peak value of current (I_s) that is obtained by dq0 transformation of current signals. Simulations of various islanding conditions have been carried out using PSCAD/EMTDC software package (Manitoba HVDC Research Centre, Winnipeg, MB, Canada) at different values of active and reactive power mismatches. Moreover, various non-islanding events have also been taken into account. The simulation results clearly point out that the proposed scheme completely eliminates the non-detection zone and rapidly detects islanding. At the same time, it also avoids nuisance tripping during various non-islanding events as well as for the system with multiple distributed generators. Comparative evaluation of the proposed scheme is also carried out with the existing scheme, and it has been observed that the proposed scheme remains stable during a non-islanding situation in which the existing scheme fails.

Keywords:

• islanding detection
• distributed generation
• non-islanding events
• dq0 transformation
• active and reactive power mismatches
• multiple distributed generations
• detection time
• varying power factor

Additional information

Notes on contributors

Karan Sareen

Karan Sareen received his B.Tech. in electrical and electronics engineering from Graphic Era University, Dehradun, India, in 2012. He obtained his M.Tech. in electrical engineering from Indian Institute of Technology Roorkee, India, in 2015. His research interests include power system protection and signal processing.

Bhavesh R. Bhalja

Bhavesh R. Bhalja received his B.E. and M.E. in power system engineering from B.V.M. Engineering College, Vallabh Vidyanagar, Gujarat, India, in 1999 and 2001, respectively. He obtained his Ph.D. from Indian Institute of Technology Roorkee in 2007. He has teaching experience of more than 13 years and is currently working as an assistant professor, Department of Electrical Engineering, Indian Institute of Technology Roorkee, India. He has published more than 100 papers in journals at international and national levels and has co-authored a book (Protection and Switchgear). He received the Young Engineers Award and Merit Award by Institution of Engineers, India, in 2009 and 2007, respectively, and is a senior member of IEEE. His research interests include smart grid technologies, power system protection and automation, distributed generation, power quality improvement, system modeling and simulation, and artificial intelligence.

Rudra Prakash Maheshwari

Rudra Prakash Maheshwari received his B.E. and M.Sc. from A.M.U. Aligarh, India, in 1982 and 1985, respectively, in Electrical Engineering. He earned his Ph.D. from University of Roorkee in 1996. He was an academic staff member with A.M.U. Aligarh and has been working as a professor, Department of Electrical Engineering, Indian Institute of Technology Roorkee, India, since 1998. He has more than 28 years of teaching experience. He has published more than 175 research papers in various international/national journals and conferences and has co-authored a book (Protection and Switchgear). His areas of interest are power system protection, developments in digital protective relay, and protective relay testing.