Wavelet Transform Based Protection of Transmission Lines with Four Quadrant Operation of STATCOM
H. V. Gururaja Rao1, Nagesh Prabhu2, R.C. Mala3 

1H.V. Gururaja Rao, Department of E&E, Manipal Institute of Technology, MAHE, Manipal, India.
2Dr. Nagesh Prabhu, Department of E&E, N.M.A.M Institute of Technology, Nitte, India.
3R.C. Mala, Department of E&E, Manipal Institute of Technology, MAHE, Manipal, India.

Manuscript received on 04 March 2019 | Revised Manuscript received on 09 March 2019 | Manuscript published on 30 July 2019 | PP: 4713-4719 | Volume-8 Issue-2, July 2019 | Retrieval Number: B3555078219/19©BEIESP | DOI: 10.35940/ijrte.B3555.078219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: This paper proposes a new wavelet transform based relay logic for the protection of transmission lines compensated with a static synchronous compensator incorporating energy storage device (STATCOM – ES). STATCOM with energy storage systems can operate in any of the four quadrants in P – Q plane. A conventional distance relay with standard settings may not be reliable to identify and categorize short circuit faults in such systems. A simple, fast acting and reliable wavelet based relay logic is presented to accurately identify and categorize transmission line faults in shunt compensated lines. The developed relay discriminates between internal and external faults accurately. It provides reliable protection for the transmission line considering the entire four quadrant operating range of STATCOM – ES and is immune to the value of fault resistance.
Index Terms: Fault Index, Line Protection, STATCOM with Energy Storage, Wavelet Transform.

Scope of the Article: Wireless Power Transmission