Vol. 1 No. 3 (2019): Volume 1, Issue 3, Year 2019

A Wavelet Based Differential Algorithm for Busbar Protection

Bharath Kumar Sugumar
PG Scholar, Department of Electrical Engineering, Government College of Technology, Coimbatore, TN, India
Sujatha Balaraman
Associated Professor, Department of Electrical Eng Government College of Tech, Coimbatore, TN, India
Published May 28, 2019
  • Busbar protection,
  • Internal and external faults,
  • Mother Wavelet,
  • Works on busbar protection
How to Cite
Sugumar, B. K., & Balaraman, S. (2019). A Wavelet Based Differential Algorithm for Busbar Protection. International Research Journal of Multidisciplinary Technovation, 1(3), 28-39. Retrieved from https://mapletreejournals.com/index.php/irjmt/article/view/236


Busbar protection is an essential component in power system design, protecting the most important system node for network stability and security. When faults occurs on busbar itself, it takes much time to isolate the bus from source which may cause much damage in the bus system. Faults in power system are classified as internal and external faults. Faults within the zone are termed as internal faults whereas, the faults outside the Zone are called as external faults. Ideally, a relay looking after the protection of a zone should operate only for internal faults. It should restrain from operating for external faults or through faults. In this paper the busbar protection using differential protection scheme has been investigated for internal and external faults. An algorithm has been developed to improve the selectivity of the relay and the same has been tested in IEEE9 bus system for internal and external faults. Separation of De-noised signal from fault signal is made using wavelet transform so that the nature of fault occurs on the system can be identified. In this study Daubechies 4 at level 3 is used to separate original signal and de-noised signal. The entire simulation has been done using MATLAB R2017a.


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