scholarly journals Discrete Wavelet Transform Application to the Protection of Electrical Power System: A Solution Approach for Detecting and Locating Faults in FACTS Environment

10.5772/36715 ◽  
2012 ◽  
Author(s):  
Enrique Reyes-Archundia ◽  
Edgar L. ◽  
Jose Antonio ◽  
Francisco Rivas-Davalos
Keyword(s):  
Wavelet Transform ◽  
Power System ◽  
Discrete Wavelet Transform ◽  
Electrical Power ◽  
Discrete Wavelet ◽  
Electrical Power System ◽  
Solution Approach ◽  
System A

Power System Disturbance Recognition Using Wavelet and S-Transform Techniques

2004 ◽  
Vol 1 (2) ◽  
Author(s):  
Jaya Bharata Reddy ◽  
Dusmanta Kumar Mohanta ◽  
B.M. Karan
Keyword(s):  
Wavelet Transform ◽  
Power System ◽  
Power Quality ◽  
A Priori ◽  
Electrical Power ◽  
Quality Analysis ◽  
Discrete Wavelet ◽  
Electrical Power System ◽  
Window Width ◽  
S Transform

Power quality issues have been a source of major concern in recent years due to extensive use of power electronic devices and non-linear loads in electrical power system and consequently sensitive detection and accurate classification of power disturbances have become very much necessary. To monitor electrical power quality disturbances, short time discrete Fourier transform (STFT) is most often used. But for non- stationary signals, the STFT does not track the signal dynamics properly due to the limitations of a fixed window width chosen a priori. This paper presents a new approach for power quality analysis using a modified wavelet transform, known as S–transform and the analysis of several power quality problems using both S–transform as well as discrete wavelet transform validates the superiority of S–transform.

CONTENT BASED IMAGE RETRIEVAL USING DISCRETE WAVELET TRANSFORM

2004 ◽  
Vol 18 (01) ◽  
pp. 19-32 ◽  
Author(s):  
SAEID BELKASIM ◽  
XIANYU HONG ◽  
O. BASIR
Keyword(s):  
Wavelet Transform ◽  
Image Retrieval ◽  
Discrete Wavelet Transform ◽  
Retrieval System ◽  
Industrial Applications ◽  
Discrete Wavelet ◽  
Retrieval Process ◽  
System A ◽  
Image Transforms ◽  
The Common

Image retrieval plays an important role in a broad spectrum of applications. Contentbased retrieval (CBR) is one of the popular choices in many biomedical and industrial applications. Discrete image transforms have been widely studied and suggested for many image retrieval applications. The Discrete Wavelet Transform (DWT) is one of the most popular transforms recently applied to many image processing applications. The Daubechies wavelet can be used to form the basis for extracting features in retrieving images based on the description of a particular object within the scene. This wavelet is widely used for image compression. In this paper we highlight the common features between compression and retrieval. Several examples are used to test the DWT retrieval system. A comparison between DWT and Discrete Cosine Transform (DCT) is also made. The retrieval system using DWT requires preprocessing and normalization of images, which might slow down the retrieval process. The accuracy of the retrieval using DWT has been significantly improved by incorporating efficient K-Neighbor Nearest Distance (KNND) measure in our system.

scholarly journals Harmonic Compensation Techniques in Electrical Distribution System- A Review.

2019 ◽  
Vol 11 (02) ◽  
pp. 129-136
Author(s):  
Ashutosh Srivastava ◽  
Amarjeet Singh
Keyword(s):  
Power System ◽  
Power Quality ◽  
Distribution System ◽  
Electrical Power ◽  
Electrical Power System ◽  
Harmonic Compensation ◽  
System A ◽  
Electrical Distribution ◽  
Non Linear ◽  
History Of

Harmonics in the power system is not new issue. This phenomenon has been introduced by technocrat throughout in the history of electrical power system. Maintaining the power quality in a power system is an essential assignment due to increase in wide variety of non-linear loads. The current drawn by such non linear loads are non-sinusoidal and therefore contains harmonics. Therefore, it becomes necessary to compensate these unwanted harmonics for better performance of the system. In this paper, a review of compensations of harmonics in distribution system has been explained.

scholarly journals Comparasion of Different Configuration of Hybrid Electrical Power System – A Case Study of a Site in Peshawar

2020 ◽  
Vol 7 (08) ◽  
pp. 268-273
Author(s):  
Raheemullah Khan ◽  
◽  
Jehan Parvez ◽  
Abdur Rehman ◽  
Muhammad Ibrahim ◽  
...  
Keyword(s):  
Power System ◽  
Electrical Power ◽  
Electrical Power System ◽  
System A ◽  
A Site

A novel discrete wavelet transform‐based graphical language classifier for identification of high‐impedance fault in distribution power system

2020 ◽  
Vol 30 (6) ◽  
Author(s):  
Veerapandiyan Veerasamy ◽  
Noor Izzri Abdul Wahab ◽  
Arangarajan Vinayagam ◽  
Mohammad Lutfi Othman ◽  
Rajeswari Ramachandran ◽  
...  
Keyword(s):  
Wavelet Transform ◽  
Power System ◽  
Discrete Wavelet Transform ◽  
Discrete Wavelet ◽  
Graphical Language ◽  
High Impedance ◽  
High Impedance Fault

scholarly journals A REVIEW OF STUDY AND ANALYSIS OF PARTIAL DISCHARGE FOR DIFFERENT INSULATION MATERIALS WITH CAPACITANCE VALUE

2021 ◽  
Vol 7 (12) ◽  
pp. 64-66
Author(s):  
Neetu Baghelkar ◽  
Abhishek Dubey
Keyword(s):  
Power Systems ◽  
Power System ◽  
High Voltage ◽  
Electrical Power ◽  
Electrical Equipment ◽  
Electrical Power System ◽  
Insulation Materials ◽  
System A ◽  
Solid Liquid

In the high voltage (HV) electrical power system, a variety of solid, liquid and gaseous materials are used for insulation purposes to protect incipient faults within the HV power equipment. Among these, solid insulation is widely used for high voltage equipment in high voltage power systems. Most insulation materials are not perfect in all respects and always contain some impurities. In high voltage (HV) electrical equipment, the quality of the insulation plays a very important role. Continued growth in the power system has provided the opportunity to protect equipment for healthy operation throughout its useful life.

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