A simple algorithm for amplitude estimation of distorted power system signal. (March 2017)

• Record Type: Journal Article
• Authors: Goswami, Soumyajit; Sarkar, Arghya; Sengupta, S.
• Is Part Of: Measurement. Volume 100(2017)
• Page Start: 150
• Page End: 156
• Publication Date: 2017-03
• Subjects: Algorithm -- Amplitude estimation -- Digital filter -- Harmonics -- Integrator; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2016.12.057
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: On-line estimation of the fundamental component of non-sinusoidal power signal. Relies on stable band-pass 1st and 2nd degree digital integrator based calculation. Both simulation and experimental test results of this algorithm are presented. Results illustrate high degree of immunity and insensitivity to harmonics and noise. Abstract: This paper presents development and implementation of a novel digital signal processing algorithm for on-line estimation of peak value of the fundamental component of a non-sinusoidal power system signal. The algorithm relies on stable band-pass first and second degree digital integrator based rigorous mathematical deduction and recombines itself with zero-crossing avoiding technique. Compared with the well-established technique such as the enhanced phase-locked-loop (EPLL) based system, the proposed algorithm provides higher degree of immunity and insensitivity to harmonics and noise, and faster response. Based on simulation studies, performances of the proposed algorithm at different operating conditions have been presented and its accuracy and response time have been compared with the EPLL systems. Moreover, a simple laboratory setup implemented by MATLAB and dedicated hardware is built to verify the performance of the proposed algorithm in real time applications. The framework of laboratory prototype has been given out and the necessary modification in proposed algorithm for on-line implementation has been discussed.