Power quality investigation, field measurements and harmonic analysis to improve production at a new chemical products facility

2012 ◽  
Author(s):  
Rakan El-Mahayni ◽  
Thomas J. Dionise ◽  
David D. Shipp
Keyword(s):  
Harmonic Analysis ◽  
Power Quality ◽  
Field Measurements ◽  
Improve Production ◽  
Chemical Products

Fuzzy implemented harmonic analysis in a three phase induction motor

2020 ◽  
Vol 39 (6) ◽  
pp. 8225-8235
Author(s):  
Bandla Pavan Babu ◽  
V Indragandhi
Keyword(s):  
Harmonic Analysis ◽  
Induction Motor ◽  
Power Quality ◽  
Digital Simulation ◽  
International Standards ◽  
Electrical System ◽  
Three Phase ◽  
Abnormal Operation ◽  
System Power

In an Electrical system, Power Quality (PQ) is becoming significant to all types of consumers. With the increase of power demand from end users, maintaining the quality of power within the limitations is a major problem. In this paper, harmonic analysis in a grid connected three phase induction motor is tested according to PQ international standards which are found in the International Electro technical Commission (IEC). These mentioned standards are maintained in the transmission line and fed to the induction motor through a regenerative grid simulator. With the results obtained, execution of this fuzzy control system can be investigated through the digital simulation, which is based on MATLAB-SIMULINK package. It provides human operands to constitute a knowledge base which is used for diagnosing power quality and capable of predicting abnormal operation in Industries.

A Power Quality Study of Metro Transit Railway Based on Field Measurement

2013 ◽  
Vol 860-863 ◽  
pp. 2572-2577
Author(s):  
Ai Qiang Pan
Keyword(s):  
Power Quality ◽  
Reactive Power ◽  
Field Measurements ◽  
Quality Characteristics ◽  
National Standards ◽  
Voltage Unbalance ◽  
Existing Problems ◽  
Unbalance Voltage ◽  
Voltage Deviation ◽  
Transient Events

Metro Transit Railways (MTRs) provide pubic convenience, but also bring power quality impact on power grid. Based on the field measurements, this paper discusses and analyzes the power quality characteristics of MTRs in Shanghai. In the terms of harmonics, voltage flicker, voltage unbalance, voltage deviation, frequency deviation and transient events, numbers of indicators are investigated to explore the power quality characteristics and existing problems of MTRs. Although harmonics are still the main problem impacting of MTRs, other power quality indicators comply with the restriction of national standards. Besides, the line charging reactive power is a common issue and transient power quality events occurs intermittently. The paper presents the corresponding proposal, which is instructive in power quality management of MTRs in cities similar as Shanghai. .

PROBABILISTIC HARMONIC ANALYSIS OF WIND GENERATORS BASED ON GENERALIZED GAMMA MIXTURE MODELS

2012 ◽  
Vol 27 (03) ◽  
pp. 1350020 ◽  
Author(s):  
GUANGLONG XIE ◽  
BUHAN ZHANG
Keyword(s):  
Harmonic Analysis ◽  
Mixture Models ◽  
Power Quality ◽  
Gaussian Mixture Models ◽  
Gaussian Mixture ◽  
Probability Density Functions ◽  
Density Functions ◽  
Generalized Gamma ◽  
Wind Generators ◽  
Harmonic Currents

Grid-connected wind generators pose the power quality problems such as harmonic propagation and summation, and these problems are hard to solve by deterministic harmonic analysis due to the random harmonic current emissions. In this paper, probabilistic harmonic analysis is utilized to approximate harmonic currents of wind generators. Generalized gamma mixture models based on Gaussian mixture models, phasor clustering and generalized gamma models, are proposed to approximate the probability density functions of harmonic propagation and summation. And the simulation network built on PSCAD/EMTDC is utilized to verify the proposed models and method.

Development of a Measuring Device and Software for Measurement of Electric Power Quantities Based on IEEE Standard 1459-2010

2013 ◽  
Vol 732-733 ◽  
pp. 830-834
Author(s):  
Chamaiporn Tanthadiloke ◽  
Thavatchai Tayjasanant
Keyword(s):  
Harmonic Analysis ◽  
Electric Power ◽  
Power Quality ◽  
Phase Measurement ◽  
Measuring Device ◽  
Result Verification ◽  
Technical Paper ◽  
Adjustable Speed Drive ◽  
Ieee Standard ◽  
Adjustable Speed

This paper presents a development of measuring device and software for 3-phase measurement of electric power quantities according to IEEE Std. 1459-2010. Blackman-Harris windowed FFT algorithm is used for the harmonic analysis to reduce the errors from leakage problems. Result verification with a technical paper has been made. Actual implementation with an adjustable speed drive at a laboratory has been carried out and crosschecked with a commercial power quality meter.

scholarly journals Mitigation of Harmonics in Power Transmission Network using Filters

2020 ◽  
Vol 9 (1) ◽  
pp. 1283-1288
Keyword(s):  
Power System ◽  
Harmonic Analysis ◽  
Power Quality ◽  
Power Transmission ◽  
Flow Analysis ◽  
Electric Utility ◽  
Load Flow ◽  
Optimal Placement ◽  
Harmonic Currents ◽  
Mitigation Techniques

In the novel times, with the surge in use of power electronics, power quality with system efficiency is playing a symbolic role for the advancement of electric supply. The fundamental purpose of the electric utility is to provide a sinusoidal voltage at constant magnitude throughout the system. This objective is convoluted because of the loads present in the system which produce harmonic currents. Due to these harmonic currents, distorted voltages and currents are carried out which affect the reliability and efficiency of the system in several ways. The sinusoidal waveform produced by electric utilities is distorted due to harmonics and increased use of non-linear loads. The deterioration of the power quality and reliability of the power system is due to the presence of these harmonics in the power system. Hence, we need a proper analytical approach to study, classify and characterize the harmonics present in the system and develop a suitable and effective mitigation method to reduce the harmonics in the power system to standard limits of harmonics prescribed by the IEEE and IEC standards. The study of the level of harmonics present in the system, their causes and effects are known as harmonic analysis or harmonics study. Based on the observations of harmonic analysis we develop mitigation techniques to reduce these harmonics. One such method is the implementation of filters. By implementing harmonic filters, we mitigate the harmonics present in the system by providing a low impedance path. The methodological procedure behind effective design and implementation of filters is achieved by performing load flow analysis to obtain the system data and harmonic analysis to obtain data of harmonics present in the system. Based on the data obtained, the type of filter and the optimal placement of filter is decided to mitigate the harmonics. The mitigation of harmonics can report significant benefits for industries, data centers, etc. in terms of overall installation cost and protection against interruptions and equipment faults in the power system. The overall process of Harmonic analysis and mitigation techniques are performed using Mi-Power software.

scholarly journals Evaluation of Linear-Load Modelling Effects on Distribution Network Reconfiguration in the Presence of Harmonic Loads

2021 ◽  
Author(s):  
MohamadAli Amini
Keyword(s):  
Harmonic Analysis ◽  
Power Quality ◽  
Distribution Network ◽  
Harmonic Distortion ◽  
Distribution Networks ◽  
Network Reconfiguration ◽  
Distribution Network Reconfiguration ◽  
Optimum Configuration ◽  
Linear Load ◽  
Comparison Results

Recently, Power Quality is attracting the attention of researchers focused on distribution network reconfiguration. Mainly, harmonic distortion as an emerging issue of distribution networks plays an essential role in power quality-oriented network reconfiguration. Commonly, harmonic analysis of distribution networks is being performed while considering non-linear loads, capacitor banks, sub-transmission transformers, and line impedances. However, in harmonic analysis, the presence of linear loads and their effects are being neglected. Consideration of linear loads in harmonic analysis affects the impedance characteristic of the distribution network. Consequently, it changes the total harmonic distortion of bus voltages. In this paper, for the first time, exhaustive research is performed on the effect of linear loads in distribution network reconfiguration by considering five conventional linear load models. The evaluations are conducted on two balanced and unbalanced distribution networks: IEEE 69-bus and 95-bus practical Iranian distribution network using particle swarm optimization aiming to find the minimum total losses of the network. Comparison results confirm that the linear load modelling is very effective in the optimum configuration.

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