Abstract
This paper presents a filtering application to improve the behavior of the Differential Equation Algorithm (DEA) against harmonic distortion in transmission and distribution power systems. The proposed filter is based on Fast Fourier Transform (FFT) techniques during steady-state conditions. The voltage and current continuous-time equations are also considered, in fault conditions, to estimate the fundamental component waveforms of voltage and current. Simulations results show the singularities problems of DEA algorithm against harmonic distortion and the accurate operation achieved within 0.32 cycles using this filtering application. (C) 2009 Elsevier B.V. All rights reserved.