Implementing fourier algorithm by linear modulation method for distance relaying application

Hui Yung Chu, Faa Jeng Lin, Ming Tong Chen, Ching Lien Huang, Shi Lin Chen

Research output: Contribution to journalArticlepeer-review

Abstract

The Fourier algorithm, due to its good frequency response characteristics, is frequently used in calculating the peak value of a distorted wave for real time measuring applications. A new method, using the linear modulation method, is proposed to implement the algorithm. It improves the defect of a large number of arithmatic operations during implementation of the algorithm. This paper describes the structure and theory of the proposed linear modulated Fourier algorithm. Test results, including the required arithmatic operations and the numerical accuracy, are reported. Moreover, application to the digital impedance relay was simulated, and the simulation results show that the proposed algorithm is suitable for relaying applications.

Keywords

  • Distance relay
  • Fourier algorithm
  • Linear modulation

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