Classification of Power Quality Disturbances in Electric Power System: A Review

Abstract

The Electrical power quality issue has attained considerable attention in last decade due to large penetration of power electronics based loads and microprocessor based controlled loads. These devices introduce power quality problem on one hand and these mal-operate due to induced power quality problems on other hand. The various techniques for classification or recognition of power quality disturbances in electrical power system have been proposed so far in different papers. This paper presents a comprehensive overview of different techniques used for feature extraction and classification of power disturbance. This paper helps the researchers to know about the different methods presented so far for power quality disturbance classification or recognition, so that further work on power quality improvement can be carried out for better results.

Perspective chapter: Power Quality and Hosting Capacity

“…The following are the primary PQ problems associated with DGs being connected to the power grid: DC injection, harmonics, voltage swells and sags, poor voltage regulation, power factor, flickering and fluctuating voltage, voltage imbalance, and prolonged interruptions. Further details regarding these problems, as well as technology and strategies for lessening the effects of DGs on PQ , are available in [16][17][18]. Egyptian Transmission/Distribution Codes, the Grid Connection Code for Solar Energy Plants, the International Electrotechnical Commission (IEC), the Institute of Electrical and Electronics Engineers (IEEE), the American National Standards Institute (ANSI), the National Institute of Standards and Technology (NIST), the National Fire Protection Association (NFPA), the European Committee for Electrotechnical Standardization (CENELEC), the National Electrical Manufacturers Association (NEMA), the Electric Power Research Institute (EPRI), Underwriters Laboratories (UL), and ESKOM for South African standards are just a few of the national and international organizations that have developed PQ standards.…”

Lead Acid Battery Analysis using S-Transform

“…The implementation of Fourier transform is to overcome the limitation of a conventional battery analysis techniques, that were actually the extension of Kalman filter and Coulomb counting, which originally were disadvantageous in terms of computational burden, time consumption and real-time application [9]. Linear time-frequency distribution (TFD) techniques have been proposed to overcome the limitations and inadequacy of Fourier transform in determining the modification within the magnitude, frequency or phase [10], [11]. There are several linear TFDs, i.e.…”

“…ST constructions are by hybridizing the elements of STFT and WT [37]. This technique is closely related to continuous WT, where the element of Morlet mother wavelet from separation of frequency band is used in determining the frequency components [10], [11]. Except for multiresolution strategy, ST formula is similar to STFT in its way of preserving the phase information.…”

Performance Verification of Power Quality Signals Classification System

“…Fourier transform is suitable technique for stationary signal and extracting spectrum components of the signals at specific frequencies. In addition, the characteristics of the signal do not change with time but it is not efficient to detect the changes in the magnitude, frequency or phase for non-stationary signal [5,6]. Thus, time-frequency distribution (TFD) is introduced to overcome the limitation of the technique.…”