<abstract xmlns="http://www.w3.org/1999/xhtml"><p>This paper presents a new table based algorithm for overcurrent relay with inverse-time characteristic. The algorithm is based on loading the adequate time vector through which inverse-time characteristic is modeled. It uses samples of the current and calculates rms value. The rms current represents an input value for the index estimation what determines corresponding element from already loaded time vector. Since the calculations used in this algorithm are based on simple mathematical operations, short processing time is achieved. Performances of the algorithm are tested by several computer-generated signals. Furthermore, comparative analyses showed indisputably that suggested procedure possesses significant advantages compared to other solutions: simplicity, high speed of operation and accuracy.</p></abstract>

This paper presents a new table based algorithm for overcurrent relay with inverse-time characteristic. The algorithm is based on loading the adequate time vector through which inverse-time characteristic is modeled. It uses samples of the current and calculates rms value. The rms current represents an input value for the index estimation what determines corresponding element from already loaded time vector. Since the calculations used in this algorithm are based on simple mathematical operations, short processing time is achieved. Performances of the algorithm are tested by several computer-generated signals. Furthermore, comparative analyses showed indisputably that suggested procedure possesses significant advantages compared to other solutions: simplicity, high speed of operation and accuracy.

Table Based Algorithm for Inverse-Time Overcurrent Relay

Faculty of Electrical Engineering, University of Belgrade, Bulevar kralja Aleksandra 73, 11120 Belgrade, Serbia

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Table Based Algorithm for Inverse-Time Overcurrent Relay"}

This paper presents a new table based algorithm for overcurrent relay with inverse-time characteristic. The algorithm is based on loading the adequate time...

Table Based Algorithm for Inverse-Time Overcurrent Relay

Published Online: Aug 21, 2014

Page range: 213 - 220

Received: Mar 25, 2013

DOI: https://doi.org/10.2478/jee-2014-0033

Keywords
digital relaying, overcurrent protection, inverse-time characteristic, overcurrent relay

© 2014 Faculty of Electrical Engineering and Information Technology, Slovak University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Table Based Algorithm for Inverse-Time Overcurrent Relay

Published Online: Aug 21, 2014

Page range: 213 - 220

Received: Mar 25, 2013

DOI: https://doi.org/10.2478/jee-2014-0033

Keywordsdigital relaying, overcurrent protection, inverse-time characteristic, overcurrent relay

© 2014 Faculty of Electrical Engineering and Information Technology, Slovak University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
digital relaying, overcurrent protection, inverse-time characteristic, overcurrent relay