Protection Algorithm for Fault Identification and Isolation in DC Microgrid

Authors

  • N. Nageswara Reddy Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamilnadu 620015, India
  • Rajesh Velpula Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamilnadu 620015, India
  • P. Raja Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamilnadu 620015, India
  • S. Moorthi Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamilnadu 620015, India

DOI:

https://doi.org/10.13052/dgaej2156-3306.38214

Keywords:

Fault recognition, DC microgrid protection, fault isolation, protection devices, polarity of change in inductance

Abstract

In renewable energy dominated distributed ring configuration direct current (DC) networks, the protection philosophy is one of the critical challenging task. It is due to the existence of power electronic converters and erratic attributes of distributed energy sources. Consequently, conventional current direction based as well as over current protection strategies is not applicable for DC microgrids. In this paper, protection algorithm for fault recognition and isolation of faulty line is presented based on the polarity of change in inductance immediately after fault inception. The voltage and current sample information is used to determine the parameter by employing the least square estimation (LSE) technique. The efficiency of the proposed method is tested for internal and external faults, the impact of fault resistance and fault location, different system configurations, and load change conditions in MATLAB/Simulink simulation. It is noted that proposed method would categorize internal and external faults perfectly. The operating time of the proposed protection method is comparatively less than the existing methods. It also improves selectivity, security, and reliability under above mentioned abnormal cases.

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Author Biographies

N. Nageswara Reddy, Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamilnadu 620015, India

N. Nageswara Reddy received the B.tech. degree in Electrical and Electronics Engineering from JNTU, India, in 2008 and the M.Tech. degree in power systems engineering from the National Institute of Technology Calicut, India, in 2011. He is currently working toward the Ph.D. degree in Electrical Engineering with the National Institute of Technology Tiruchirappalli, Tiruchirappalli, India. His research interests include renewable energy integration, protection and control of microgrids and FACTS controller.

Rajesh Velpula, Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamilnadu 620015, India

Rajesh Velpula received the B.tech. degree in Electrical and Electronics Engineering from Acharya Nagarjuna University, India, in 2008, and the M.Tech. degree in power systems engineering from JNTUK, India, in 2010. I am currently working towards the Ph.D. degree in Electrical Engineering with the National Institute of Technology Tiruchirappalli, Tiruchirappalli, India. My research interests include power system protection, microgrids.

P. Raja, Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamilnadu 620015, India

P. Raja received the B.E. degree in electrical and electronics engineering from Manonmaniam Sundaranar University, Tirunelveli, India, in 2000, the M.Tech. degree in energy systems from IIT Madras, Madras, India, in 2001, and the Ph.D. degree from the National Institute of Technology, Tiruchirappalli, India, in 2013. He has 15 years of teaching and research experience in the field of power systems. He is currently an Associate Professor in the Electrical and Electronics Engineering Department, NIT Tiruchirappalli, Tiruchirappalli, India and is associated with the Hybrid Electrical Systems Laboratory. His areas of interest include renewable energy systems, electrical machines, and power system protection, microgrid protection.

S. Moorthi, Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamilnadu 620015, India

S. Moorthi received the B.E. degree in electrical and electronics engineering from the University of Madras, Chennai, India, in 2001, the M.E. degree in applied electronics from the PSG College of Technology, Coimbatore, India, in 2003, and the Ph.D. degree in the area of very large scale integration (VLSI) for communication circuits from Anna University, Chennai, India, in 2008. He was a Postdoctoral Fellow of the Erasmus Mundus External Cooperation Window initiated under the EURINDIA Program, through which he has done postdoctoral research on memory design for reconfigurable architectures with the Royal Institute of Technology (KTH), Stockholm, Sweden, in 2010–2011. Since 2007, he has been a member of faculty of the Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, India, where he is also associated with the Hybrid Electrical Systems Laboratory. His research interests include VLSI for Digital Controllers for Power Applications, signal processing and embedded systems.

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Published

2023-01-03

How to Cite

Reddy, N. N. ., Velpula, R. ., Raja, P. ., & Moorthi, S. . (2023). Protection Algorithm for Fault Identification and Isolation in DC Microgrid. Distributed Generation &Amp; Alternative Energy Journal, 38(02), 691–714. https://doi.org/10.13052/dgaej2156-3306.38214

Issue

2023: Vol 38 Iss 2

Section

Articles