scholarly journals POWER QUALITY ANALYSIS BY THE RIPPLE TECHNIQUE

2017 ◽  
Vol 2 (4) ◽  
pp. 227 ◽  
Author(s):  
Amam Hossain Bagdadee
Keyword(s):  
Power System ◽  
Power Quality ◽  
Electrical Power ◽  
Quality Monitoring ◽  
Quality Analysis ◽  
Electrical Power System ◽  
Power Quality Monitoring ◽  
Power Quality Analysis ◽  
Institute Of Technology

Characteristics of Power quality has been with us since the inception of the electrical Power system. However, the topic of power quality has attracted particular attention in recent years due to the increase of electronically controlled. Power quality problems caused disruptions to electrical or electronic equipment and the resulting consequences are very expensive. Ripple techniques will be studied in this paper for analysing power quality monitoring. In the case study based on the measurement of the site of the Asian Institute of Technology (AIT) and it was examined using the proposed ripple technique.

Power Quality Analysis for Ship-Photovoltaic Power System: A Case Study

2018 ◽  
Vol 46 (11-12) ◽  
pp. 1375-1386 ◽  
Author(s):  
Yuanchao Qiu ◽  
Chengqing Yuan ◽  
Yuwei Sun ◽  
Xujing Tang
Keyword(s):  
Power System ◽  
Power Quality ◽  
Quality Analysis ◽  
System A ◽  
Photovoltaic Power ◽  
Power Quality Analysis

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.

Multi-Source Fusion Power Quality Monitoring and Analysis Application System

2013 ◽  
Vol 448-453 ◽  
pp. 2341-2344 ◽  
Author(s):  
Guo You Wang ◽  
Yu Shi ◽  
He Zhang ◽  
Biao Long Su ◽  
Xiao Qing Zhang
Keyword(s):  
Power Quality ◽  
Public Services ◽  
Technical Specification ◽  
Quality Monitoring ◽  
Quality Analysis ◽  
Communication Service ◽  
Power Quality Monitoring ◽  
Analysis Application ◽  
Power Quality Analysis ◽  
Monitoring Software

There is a restriction on the development of power quality monitoring software for lacking of corresponding technical specification and uniform systematic planning. In this thesis, the concept of supporting platform of power quality monitoring and analysis system is posed and the supporting platform provides data service, report work, authority management, alarm service, authority management, communication service and other public services; abiding by the advocacy of IEC 61970 Standard, the system applies CORBA component technology inside and outside the system and realizes the “plug and play” of public services and applications. Through the standardized public communication service module, the data interaction with other power quality monitoring software, PMS system, DMS/EMS system and other third-party systems is completed and the multi-angle and deep power quality analysis are conducted based on multi-source information fusion technology and the power quality analysis and evaluation, harmonic source location, power quality warning, management decision support and other intelligent analysis application are realized.

scholarly journals Harmonics Analysis and Enhancement of Power Quality in Hybrid Photovoltaic and Wind power System for Linear and Nonlinear Load using 3 Levels Inverter

2021 ◽  
Vol 10 (1) ◽  
pp. 296-307
Author(s):  
Atul Kumar ◽  
Imran Khan
Keyword(s):  
Solar Wind ◽  
Power System ◽  
Power Quality ◽  
Electrical Power ◽  
Harmonic Distortion ◽  
Electrical Energy ◽  
Energy System ◽  
Quality Analysis ◽  
Electrical Power System ◽  
Nonlinear Load

The emergent use of non-conventional energy resources in electrical power grid has initiated new challenge for the service load as concern to voltage balance, power quality issues and effective energy operation. Solar/ wind hybrid RES deliberated as the furthermost promising sources. Nevertheless standalone operations of distributed energy sources such as solar and wind not make sure of reliable power production principally owing to the randomness over the solar irradiance and accessibility of the wind. Hence, a combination of wind and solar energy production configuration can plan a highly reliable source of electrical energy. In This article, multi-level inverter (3 levels inverter) based grid tied hybrid solar- wind energy system based on a 3 level inverter is presented with the mitigation of power quality problems. In this work, analysis on simulation model is conceded to determine source current and voltage and percentage of total harmonic distortion. In particular, the power quality analysis is performed in grid tied hybrid solar and wind electrical power system using 3 level inverter.

scholarly journals Optical Voltage Transformer Based on FBG-PZT for Power Quality Measurement

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2699
Author(s):  
Marceli N. Gonçalves ◽  
Marcelo M. Werneck
Keyword(s):  
Power System ◽  
Power Quality ◽  
Distribution System ◽  
Electrical Power ◽  
Quality Measurement ◽  
Pockels Effect ◽  
Electrical Power System ◽  
Voltage Transformer ◽  
Technical Literature ◽  
Distribution Lines

Optical Current Transformers (OCTs) and Optical Voltage Transformers (OVTs) are an alternative to the conventional transformers for protection and metering purposes with a much smaller footprint and weight. Their advantages were widely discussed in scientific and technical literature and commercial applications based on the well-known Faraday and Pockels effect. However, the literature is still scarce in studies evaluating the use of optical transformers for power quality purposes, an important issue of power system designed to analyze the various phenomena that cause power quality disturbances. In this paper, we constructed a temperature-independent prototype of an optical voltage transformer based on fiber Bragg grating (FBG) and piezoelectric ceramics (PZT), adequate to be used in field surveys at 13.8 kV distribution lines. The OVT was tested under several disturbances defined in IEEE standards that can occur in the electrical power system, especially short-duration voltage variations such as SAG, SWELL, and INTERRUPTION. The results demonstrated that the proposed OVT presents a dynamic response capable of satisfactorily measuring such disturbances and that it can be used as a power quality monitor for a 13.8 kV distribution system. Test on the proposed system concluded that it was capable to reproduce up to the 41st harmonic without significative distortion and impulsive surges up to 2.5 kHz. As an advantage, when compared with conventional systems to monitor power quality, the prototype can be remote-monitored, and therefore, be installed at strategic locations on distribution lines to be monitored kilometers away, without the need to be electrically powered.

Sign in / Sign up

Export Citation Format

Share Document