Empirical mode decomposition application for short-term flicker severity

Authors

YASEMİN ÖNAL
ÖMER NEZİH GEREK
DOĞAN GÖKHAN ECE

DOI

10.3906/elk-1306-201

Abstract

In this article, an approach based on empirical mode decomposition (EMD) is suggested in order to calculate short-term flicker severity, Pst, in power systems. EMD is a new signal processing method used for the analysis of nonlinear and nonstationary signals. Pst is an important quantity in the electric power quality index defined by the International Electrotechnical Commission. In the suggested approach, the voltage signal is separated into intrinsic mode function components using EMD. These components are used for calculating the voltage flicker amplitude and frequency, and Pst is calculated as a result of the statistical evaluation of flicker amplitude. EMD is thought to be efficient in finding the flickers and calculating Pst due to power to find the changes in the oscillating signal envelope of EMD. Simulations are made using an input signal modulated with single and multiflicker frequency. Simulations show that the approach is usable in the calculation of Pst and it gives good results.

Keywords

Short term flicker severity, empirical mode decomposition, intrinsic mode function, voltage flicker, power quality

First Page

499

Last Page

509

Recommended Citation

ÖNAL, YASEMİN; GEREK, ÖMER NEZİH; and ECE, DOĞAN GÖKHAN (2016) "Empirical mode decomposition application for short-term flicker severity," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 24: No. 2, Article 12. https://doi.org/10.3906/elk-1306-201
Available at: https://journals.tubitak.gov.tr/elektrik/vol24/iss2/12