scholarly journals Power Quality and Voltage Sag Indices in Electrical Power Systems

10.5772/18181 ◽  
2011 ◽  
Author(s):  
Alexis Polycarpou
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Electrical Power ◽  
Voltage Sag ◽  
Electrical Power Systems

Power Quality of Electrical Power Systems

2019 ◽  
pp. 265-288 ◽  
Author(s):  
Feras Youssef Mahfoud ◽  
Basarab Dan Guzun ◽  
George Cristian Lazaroiu ◽  
H. H. Alhelou
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Electrical Power ◽  
Poor Quality ◽  
Energy Costs ◽  
Electrical Power Systems ◽  
Work Stoppage ◽  
Complete Work ◽  
Single Figure

Power quality problems can cause processes and equipment to malfunction or shut down. And the consequences can range from excessive energy costs to complete work stoppage. Obviously, power quality is critical. There are many ways in which a power feed can be poor quality, and so no single figure can completely quantify the quality of a power feed. In this chapter, the authors present all definitions, classifications, and problems related to power quality. Finally, they do a comparison between the practical measurements and standards related to power quality.

scholarly journals Improving Electrical Power Quality in Distribution Networks using a Unified Power Quality Conditioner (UPQC) Controlled by an Adaptive Hysteresis Band

2021 ◽  
Vol 23 (2) ◽  
pp. 91-109
Author(s):  
Marah Mariam ◽  
◽  
Hassan Kenjrawy
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Electrical Power ◽  
Distribution Networks ◽  
Electrical Power Systems ◽  
Distortion Factor ◽  
Unified Power Quality Conditioner ◽  
Power Quality Conditioner

Recently the use of sensitive electronic devices has increased, and the quality of energy has become an important factor in electrical power systems, where disturbances occurring in the network (harmonics, swell, voltage sag, etc.) affect consumers and lead to technical-economic damages. One of the most prominent solutions to address energy quality problems is the UPQC (Unified Power Quality Conditioner). In this paper, the unified power quality conditioner used to improve the electrical power quality in the distribution networks was discussed, where the Park transformations are used to obtain the required reference signals, and also the use of adaptive hysteresis band to generate the electronic switch pulses in both serial and shunt switches, where the pulse width is determined by dependence on fuzzy logic. The studied system was validated by simulating different distortion cases and comparing the results when using the Sinusoidal Pulse Width Modulation (SPWM) to control the two switches. The results showed improvement in the electrical power quality through the use of an adaptive hysteresis band controller, and that appeared by reducing the total distortion factor (THD%), which resulted in improving the shape of both the voltage and current waveforms.

scholarly journals Analysis of the influence of non-sinusoidal and unbalanced network modes on induction motors

2021 ◽  
Vol 289 ◽  
pp. 01002
Author(s):  
Ngo Van Cuong ◽  
Lidiia I. Kovernikova
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Induction Motors ◽  
Electrical Power ◽  
Electrical Energy ◽  
Operating Conditions ◽  
Premature Aging ◽  
Electrical Network ◽  
Electrical Networks ◽  
Electrical Power Systems

The parameters of electrical network modes do not correspond the requirements GOST 32144-2013 of Russian and the National technical regulation of Vietnam. In real operating conditions in electrical networks in non-sinusoidal and unbalanced modes there are harmonic components of voltages and currents as well as voltages and currents of negative sequence. They cause additional losses of active power, which leads to additional heating and causes premature aging of the insulation, and as the result, the reduction in the service life of induction motors. Currently, we see that the process of formation of intelligent electrical power systems is underway. Systems for continuous monitoring of power quality indices and parameters of electrical systems modes are being developed. These systems can be supplemented with programs for calculating characteristics that issue the warning when the unfavorable influence of the parameters of non-sinusoidal and unbalanced modes is detected on various electrical equipment of both electrical power systems and consumers of electrical energy. The paper provides an overview of the characteristics used to analyze, assess and predict the influence of poor power quality associated with non-sinusoidal and unbalanced of currents and voltages on induction motors. A computer program was developed to calculate these characteristics. The program was used to study the influence of non-sinusoidal and unbalanced modes on the induction motors of the coal sorting plant of the Vietnamese company “Cua Ong-Vinacomin”.

scholarly journals Low-cost platform for the evaluation of single phase electromagnetic phenomena of power quality according to the IEEE 1159 standard

DYNA ◽  
2015 ◽  
Vol 82 (194) ◽  
pp. 119-129 ◽  
Author(s):  
Jorge Luis Diaz Rodriguez ◽  
Luis David Pabón Fernández ◽  
Jorge Luis Contreras Peña
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Single Phase ◽  
Hardware Implementation ◽  
Low Cost ◽  
Electrical Power ◽  
Electrical Power Systems ◽  
Acquisition Device ◽  
Ieee Standard ◽  
Study Case

This paper presents the development of a data acquisition system and the evaluation of the electromagnetic phenomena associated with power quality according to the IEEE Standard 1159-1992 and applied to the particular case of single-phase electrical power systems. The evaluation software is implemented in the Labview® professional software using a NI 6009 USB board of the National Instrument® as acquisition device. The hardware implementation of the sensors was shown. Also the development of the algorithm and the design of a graphical user interface for viewing of the voltage and current waveforms, spectra, frequency and the power quality disturbances such as sags, swells, undervoltage, overvoltage, so on. Likewise, at the end a concise analysis of costs is presented to show that the developed system has a lower price to current solutions that are available in the market. Finally a study case was shown.

scholarly journals Review of Power Quality Issues and Mitigation Techniques in Electrical Power Systems

2020 ◽  
Vol 4 (5) ◽  
pp. 116-120
Author(s):  
Abdul Pasha SK ◽  
Prema kumar N
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Electrical Power ◽  
Electrical Power Systems ◽  
Source Power ◽  
Active Power Filters ◽  
Power Filters ◽  
Voltage Quality ◽  
Power Quality Improvement ◽  
Dynamic Voltage

Power quality complications are treated as interrupted voltage, current or frequency which reflects as malfunction of connected elements at end levels. User system models, smoothen loads of industries and crucial, regular operations of all effected by kinds of outcomes & line distortions, they can impact with economy of the whole system. Here the power quality includes the enhancement of voltage quality, source power factor, control of harmonic distortions, voltage sags and swells. The devices selected for power quality improvement are DSTATCOM, Hybrid active power filters, Dynamic voltage restorers, static var compensators TVSS,CVT etc.

Voltage Quality in Electrical Power Systems

2001 ◽  
Author(s):  
J. Schlabbach ◽  
D. Blume ◽  
T. Stephanblome
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Electrical Power Systems ◽  
Voltage Quality
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