Emulation of Auto-Reclosing Scheme with Adaptive Dead Time Control for Protection of Series Compensated Transmission Line

Abstract

Series compensation plays an important role in smart power grid to improve power transfer capacity and voltage profiles. Majority of faults occurring in grid are transient in nature. However, discrimination between transient fault and permanent fault are contemporary problems in the field of distance protection of transmission line. Auto-reclosure is one of the foremost solutions for the same. This paper demonstrates implementation of auto-reclosing scheme using Modified Full Cycle Discrete Fourier Transform with adaptive dead time control. The fault detection logic is based on monitoring impedance trajectory in the R-X diagram of distance relay. The reclosing instance is identified by examining differential voltage across the contacts of circuit breaker. During transient fault condition, based on the time by which the breaker voltage retarded to normal value (below preset threshold) is used to set adaptive dead time of reclosure. Software validations have been performed with the variation in fault location, fault resistance, and fault location with varying line compensation level. Real time validation is also performed using digital signal controller on laboratory prototype. The outcome of simulation and emulation indicates substantial reduction in dead time indicating effectiveness of the developed scheme.

Keywords:

• auto-reclosure
• dead time
• modified full cycle discrete Fourier transform
• numerical relay
• permanent fault
• transient fault

Additional information

Notes on contributors

Ujjaval J. Patel

Ujjaval J. Patel is an Assistant Professor in the Department of Electrical Engineering, Adani Institute of Infrastructure Engineering, Ahmedabad, India. He received B.E. degree from L.D. College of Engineering, Ahmedabad, Gujarat in 2001 & Master from M.S. University – Faculty of Technology, Vadodara, India in 2008. Currently, he is pursuing Ph.D. from CHARUSAT University, Anand, India. His fields of interest are applications of microprocessors & microcontrollers for control of real time applications and power system protections. He is life member of Institution of Engineers (IE), India & life member of Indian Society of Technical Education (ISTE).

Nilesh G. Chothani

Nilesh G. Chothani received B.E. degree from Saurashtra University, Rajkot, Gujarat in 2001 and M. E. degrees in power system from Sardar Patel University, Vallabh Vidyanagar, India in 2004. He received his Ph.D. degree in Electrical Engineering from Sardar Patel University, India in 2013. He is an Associate Professor in the Department of Electrical Engineering, ADIT, New Vallabh Vidyanagar, India. He is life member of IEEE, Institution of Engineers India & life member of Indian Society of Technical Education (ISTE). He has developed state of the art power system protection laboratory including real time operation of digital/numerical relaying scheme. He has published more than 35 papers at international and national levels. He has received a research grant from Department of Science and Technology (DST), India. His research interests include power system analysis and simulation, system protection, power system stability, and artificial intelligence.

Praghnesh J. Bhatt

Dr. Praghnesh Bhatt is presently working as Associate Professor in Department of Electrical Engineering, School of Technology of Pandit Deendayal Petroleum University (PDPU), Gandhinagar. He completed his B.E. in Electrical Engineering from L D College of Engineering, Ahmedabad and M.E. in Electrical Engineering from BVM Engineering College, Vallabh Vidhyanagar with specialization in Electrical Power Systems. He received his Ph.D. from S V National Institute of Technology (SVNIT), Surat in year 2012. He has published many research papers in globally reputed international journals and conferences. He is a member of IEEE and IEEE Power & Energy Society. He is also a life member of Indian Society of Technical Education (ISTE). His areas of interest are power system dynamics and stability, grid integration of wind power generation, distributed generation, smart grid, and power system protection.

Dhaval N. Tailor

Mr. Dhaval N. Tailor is working as an Assistant professor in the Department of Electrical Engineering, ADIT, New Vallabh Vidyanagar, India. He completed his B.E. in Electrical Engineering from G H Patel college of Engineering & Technology, Vallabh Vidhyanagar, Gujarat in 2010 and M. E. degree in electrical power system from BVM Engineering College, Vallabh Vidyanagar, India in 2013. Currently, he is pursuing Ph.D. from Gujarat Technology University, Ahmedabad. He is life member of IE (India) & life member of Indian Society of Technical Education (ISTE). His research field is performance investigation & protection of transmission line using digital distance relay. He is the Co-investigator of research grant project from Department of Science and Technology (DST), India. His areas of interest are power system protection, power system modeling & fault analysis, and embedded system & industrial automation.