scholarly journals A general review of power quality standards and terminologies

2021 ◽  
Vol 23 (12) ◽  
pp. 102-145
Author(s):  
V.A Deshmukh ◽  
◽  
B. Sridhar ◽  
Keyword(s):  
Energy Conservation ◽  
Power Quality ◽  
Power Converters ◽  
Quality Standards ◽  
Financial Loss ◽  
Nonlinear Loads ◽  
Network Interconnection ◽  
General Review ◽  
Ac Power ◽  
Analytical Quantification

In the next few years, more than 80% of AC power is to be processed through power converters owing to their benefits of energy conservation, flexibility, network interconnection, and weight and volume reduction in a number of equipment such as lighting arrestors, HVAC computers, fans, and so on.This paper gives an introduction on power quality (PQ), causes and effects of power quality problems. It also deals with power quality definitions, terminologies, standards, bench-marks, monitoring requirements, financial loss, and analytical quantification. It also discusses various types of nonlinear loads, which cause these power quality problems, they are illustrated, classified, modeled, quantified, and analyzed forassociated power quality issues.

scholarly journals A general review of power quality standards and terminologies

2021 ◽  
Vol 23 (09) ◽  
pp. 864-901
Author(s):  
V.A Deshmukh ◽  
◽  
B. Sridhar ◽  
Keyword(s):  
Energy Conservation ◽  
Power Quality ◽  
Power Converters ◽  
Quality Standards ◽  
Financial Loss ◽  
Nonlinear Loads ◽  
Network Interconnection ◽  
General Review ◽  
Ac Power ◽  
Analytical Quantification

In the next few years, more than 80% of AC power is to be processed through power converters owing to their benefits of energy conservation, flexibility, network interconnection, and weight and volume reduction in a number of equipment such as lighting arrestors, HVAC computers, fans, and so on. This paper gives an introduction on power quality (PQ), causes and effects of power quality problems. It also deals with power quality definitions, terminologies, standards, bench- marks, monitoring requirements, financial loss, and analytical quantification. It also discusses various types of nonlinear loads, which cause these power quality problems, they are illustrated, classified, modeled, quantified, and analyzed for associated power quality issues.

scholarly journals Power Quality Improvement of a Solar Energy Conversion System by a Coordinated Active and LCL Filtering

2021 ◽  
Author(s):  
Atallah Ouai ◽  
Lakhdar Mokrani ◽  
Mohamed Machmoum ◽  
Azeddine Houari
Keyword(s):  
Power Quality ◽  
Power Converters ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Pv System ◽  
Nonlinear Loads ◽  
Nonlinear Load ◽  
Pwm Inverter ◽  
Electrical Grid ◽  
Almost All

Power converters play an essential role in Photovoltaic (PV) system to maximize the power transfer to the electrical grid. However, the generated harmonics in the grids due to these power converters and nonlinear loads are considered one of the encountered problems to overcome. This paper presents a decoupled control of PV field real power and reactive power injected to the high voltage network via a PWM inverter by using fuzzy logic controllers. Elsewhere, a procedure based on a coordinated active and LCL filtering is proposed to mitigate the harmonic current introduced by a nonlinear load and the inverter itself in such a way to enhance the power quality injected into the grid. The results obtained in the present study show the good performance of the suggested hybrid filtering approach and demonstrate that almost all harmonics orders of the grid current are well mitigated; the current Total Harmonic Distortion (THD) meets its standard and consequently the power quality is considerably enhanced.

scholarly journals DC-Link Capacitor Voltage Balancing Control of a Five-Level Regenerative AC Electronic Load Using One-Cycle Control

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6101
Author(s):  
In Wha Jeong
Keyword(s):  
Power Converters ◽  
Product Liability ◽  
Balance Performance ◽  
Nonlinear Loads ◽  
Ac Power ◽  
Capacitor Voltage ◽  
Voltage Balance ◽  
Testing Medium ◽  
Electronic Load ◽  
Capacitor Voltage Balance

High voltage electric power equipment requires rigorous regulation testing to specific standards which ensure proper and safe operation in the grid. Manufacturers conduct these tests in order to prove standard compliance and product liability. Variable linear or nonlinear loads are necessary for testing medium voltage (MV) high power AC power converters. Generally, those AC power converters or power supplies require performance validation, burn-in and/or lifetime testing under different load conditions, defined by the end-user or standards for the given applications. For flexible and efficient MV verification testing, this paper presents a five-level multilevel converter-based MV regenerative AC electronic load with one-cycle control (OCC), which is based on five-level diode-clamped multilevel converters with back-to-back structure and can emulate any impedance load. In this paper, especially the dc-link capacitor voltage balance of the proposed multilevel MV regenerative AC load is deeply analyzed. Simulation and experimental results are presented to verify the dc-link voltage balance performance of the proposed multilevel MV regenerative AC electronic load.

Performance Analysis of Unified Power Quality Conditioner for Power Quality Improvement

2014 ◽  
Vol 573 ◽  
pp. 690-695
Author(s):  
Ragavan Saravanan ◽  
P.S. Manoharan
Keyword(s):  
Power Quality ◽  
Control Algorithm ◽  
Electrical Power ◽  
Frame Theory ◽  
Nonlinear Loads ◽  
Unified Power Quality Conditioner ◽  
Synchronous Reference Frame ◽  
Power Quality Improvement ◽  
Linear And Nonlinear ◽  
Power Quality Conditioner

The Unified Power Quality Conditioner plays an important role in the constrained delivery of electrical power from a source to an isolated pool of load or from a source to the grid. This article is presented new control approaches for both series and shunt inverter. The proposed control algorithm for series and shunt converters based on FLC and synchronous reference frame theory respectively. The proposed approach eliminates the total harmonic distortions (THD) efficiently, and mitigates sag and swell present in the linear and nonlinear loads.

Construction and survey of changes in electric arc furnace parameters based on energy conservation model using Pscad software

2021 ◽  
Vol 15 (1) ◽  
pp. 75-83
Author(s):  
Ngoc Toan Luong ◽  
◽  
Duc Tung Doan
Keyword(s):  
Energy Conservation ◽  
Power Quality ◽  
Power Level ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Electricity Grid ◽  
Power Quality Improvement ◽  
Conservation Model ◽  
The Impact

Actual analysis showed that the arc furnace current contains many harmonics that adversely affect the power quality. There are many domestic and foreign reports on modeling and assessing the impact of EAF on the grid based on different models. However, EAF's selection of capacity for research and application of power quality improvement devices suitable to the power level has not been mentioned, these models are mainly built on Matlab Simulink software. should be primarily academic. PSCAD is one of the widely used software for electrical system simulation and is used by large companies such as ABB, Korean power corporation Kepco. Building EAF model with PSCAD software will increase the ability to apply simulation results into practice. The objective of the paper is to build an electric arc furnace model based on the energy conservation model with PSCAD software, thereby assessing the change of parameters in the model and the effect of this load on electricity grid during operation.

Power Quality Issues and Solutions – Review

2015 ◽  
Vol 16 (4) ◽  
pp. 357-384 ◽  
Author(s):  
Suresh Mikkili ◽  
Anup Kumar Panda
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution Systems ◽  
Reactive Power ◽  
Electrical Power ◽  
Economic Loss ◽  
Nonlinear Loads ◽  
Broad Perspective ◽  
Three Phase ◽  
Quality Issues

Abstract Electrical power quality has been an important and growing problem because of the proliferation of nonlinear loads such as power electronic converters in typical power distribution systems in recent years. Particularly, voltage harmonics and power distribution equipment problems result from current harmonics produced by nonlinear loads. The Electronic equipment like, computers, battery chargers, electronic ballasts, variable frequency drives, and switch mode power supplies, generate perilous harmonics and cause enormous economic loss every year. Problems caused by power quality have great adverse economic impact on the utilities and customers. Due to that both power suppliers and power consumers are concerned about the power quality problems and compensation techniques. Power quality has become more and more serious with each passing day. As a result active power filter gains much more attention due to excellent harmonic and reactive power compensation in two-wire (single phase), three-wire (three-phase without neutral), and four-wire (three-phase with neutral) ac power networks with nonlinear loads. However, this is still a technology under development, and many new contributions and new control topologies have been reported in the last few years. It is aimed at providing a broad perspective on the status of APF technology to the researchers and application engineers dealing with power quality issues.

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