Next Article in Journal
Influence of Combustion Parameters on Fouling Composition after Wood Pellet Burning in a Lab-Scale Low-Power Boiler
Next Article in Special Issue
Adaptation of Powerline Communications-Based Smart Metering Deployments to the Requirements of Smart Grids
Previous Article in Journal
Parametric Optimization of Regenerative Organic Rankine Cycle System for Diesel Engine Based on Particle Swarm Optimization
Previous Article in Special Issue
A Novel Choice Procedure of Magnetic Component Values for Phase Shifted Full Bridge Converters with a Variable Dead-Time Control Method
Article Menu

Export Article

Open AccessArticle
Energies 2015, 8(9), 9777-9793;

An Application of Spectral Kurtosis to Separate Hybrid Power Quality Events

Research Group Plan Andaluz Investigación Desarrollo Tecnológico e Innovación-Tecnologías de la Información y Comunicación-168 (PAIDI-TIC-168): Computational Instrumentation and Industrial Electronics (ICEI), E-11202 Algeciras, Spain
University of Cádiz, Area of Electronics, Polytechnic School of Algeciras, Av. Ramón Puyol, S/N,E-11202 Algeciras, Spain
Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +34-956-028-069; Fax: +34-956-028-001.
Author to whom correspondence should be addressed.
Academic Editor: Thorsten Staake
Received: 1 July 2015 / Revised: 18 August 2015 / Accepted: 26 August 2015 / Published: 9 September 2015
(This article belongs to the Special Issue Smart Metering)
Full-Text   |   PDF [313 KB, uploaded 9 September 2015]   |  


For the development of the future smart grid, the detection of power quality events is a key issue for the power system monitoring. Voltage sags, swells, harmonics (variations) and interruptions, which produce large losses for commercial and industrial consumers, are the main events to be considered due to the sensitivity of equipment to these electrical anomalies. The steady-state events are even more frequently accompanied by transients, the discrimination and localization being far more exigent and requiring advanced signal separating tools to be incorporated in the measurement equipment. This paper shows the event detection performance of the spectral kurtosis as a signal separating tool in the frequency domain. The disturbances under test are hybrid signals resulting from the coupling between amplitude defects and non-desired higher frequencies. Being a fourth-order spectrum, the kurtosis is confirmed as a noise-resistant tool that enhances impulsiveness, therefore characterizing the electrical anomalies. In the beginning of the analysis, the voltage sag is established as a reference; then, the disturbances (oscillatory transients and harmonics) are coupled at the starting and ending instants of the sag, resulting in complex hybrid events. The results show that the spectral kurtosis enhances the detection Energies 2015, 8 9778 of both types of events (steady state and transients), which are outlined in a bump shape in the fourth-order frequency pattern and centered in the main carrier frequency. Indeed, while the oscillatory transients are associated with softer and lower-amplitude peaks, the harmonics correspond to crisper and higher ones. As these mixed electrical faults are very common in the actual power grid, the article postulates the higher-order spectra to be implemented in prospective online measurement instruments. View Full-Text
Keywords: harmonic distortion; higher-order statistics; mixed PQ(power quality) events; oscillatory transients; power quality; spectral kurtosis harmonic distortion; higher-order statistics; mixed PQ(power quality) events; oscillatory transients; power quality; spectral kurtosis

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

de la Rosa, J.J.G.; Sierra-Fernández, J.M.; Palomares-Salas, J.C.; Agüera-Pérez, A.; Montero, Á.J. An Application of Spectral Kurtosis to Separate Hybrid Power Quality Events. Energies 2015, 8, 9777-9793.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top