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Artykuły w czasopismach na temat „PQ PROBLEMS”

Autor: Grafiati

Data publikacji: 11 września 2023

Data aktualizacji: 31 lipca 2025

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1

Öhnell, Richard F. "Some PQ problems." Acta Medica Scandinavica 130, S206 (2009): 17–19. http://dx.doi.org/10.1111/j.0954-6820.1948.tb12015.x.

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Goud, B. Srikanth, Ch Rami Reddy, Mohit Bajaj, Ehab E. Elattar, and Salah Kamel. "Power Quality Improvement Using Distributed Power Flow Controller with BWO-Based FOPID Controller." Sustainability 13, no. 20 (2021): 11194. http://dx.doi.org/10.3390/su132011194.

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The integration of hybrid renewable energy sources (HRESs) into the grid is currently being encouraged to meet the increasing demand for electric power and reduce fossil fuels which are causing environmental-related problems. Integration of HRESs into the grid can create some power quality (PQ) problems. To mitigate PQ problems and improve the performance of grid-connected HRESs some flexible devices should be used. This paper presents a distributed power flow controller (DPFC), as a type of flexible device to mitigate some PQ problems, including voltage sag, swell, disruptions, and eliminatin

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Sa'idu, Adamu, Nasiru B. Kadandani, and Bala Boyi Bukata. "A review of convolutional neural networks for classifying power quality problems using Keras API." Indonesian Journal of Electrical Engineering and Computer Science 38, no. 1 (2025): 1. https://doi.org/10.11591/ijeecs.v38.i1.pp1-21.

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<p>The major causes of electric power quality (PQ) problems are mainly due to the increased utilization of nonlinear loads, capacitor and load switching events, transformer energization, and occurrence of assorted faults at the distribution corridor. The problems often introduce harmonics and other waveform anomalies like voltage sags, voltage swells and interruptions along the power systems. A timely classification of such problems is important in understanding their impact on costly power system economy. The paper explores comprehensive review of PQ issues, operational concept of convo

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4

Adamu, Sa'idu Nasiru B. Kadandani Bala Boyi Bukata. "A review of convolutional neural networks for classifying power quality problems using Keras API." Indonesian Journal of Electrical Engineering and Computer Science 38, no. 1 (2025): 1–21. https://doi.org/10.11591/ijeecs.v38.i1.pp1-21.

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The major causes of electric power quality (PQ) problems are mainly due to the increased utilization of nonlinear loads, capacitor and load switching events, transformer energization, and occurrence of assorted faults at the distribution corridor. The problems often introduce harmonics and other waveform anomalies like voltage sags, voltage swells and interruptions along the power systems. A timely classification of such problems is important in understanding their impact on costly power system economy. The paper explores comprehensive review of PQ issues, operational concept of convolutional

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5

Arov, D. Z., B. Fritzsche, and B. Kirstein. "Completion problems forj pq-inner functions. II." Integral Equations and Operator Theory 16, no. 4 (1993): 453–95. http://dx.doi.org/10.1007/bf01205289.

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Arov, D. Z., B. Fritzsche, and B. Kirstein. "Completion problems forj pq-inner functions. I." Integral Equations and Operator Theory 16, no. 2 (1993): 155–85. http://dx.doi.org/10.1007/bf01358952.

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Bhende, C. N., A. Kalam, and S. G. Malla. "Mitigation of Power Quality Problems in Grid-Interactive Distributed Generation System." International Journal of Emerging Electric Power Systems 17, no. 2 (2016): 165–72. http://dx.doi.org/10.1515/ijeeps-2015-0163.

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Abstract Having an inter-tie between low/medium voltage grid and distributed generation (DG), both exposes to power quality (PQ) problems created by each other. This paper addresses various PQ problems arise due to integration of DG with grid. The major PQ problems are due to unbalanced and non-linear load connected at DG, unbalanced voltage variations on transmission line and unbalanced grid voltages which severely affect the performance of the system. To mitigate the above mentioned PQ problems, a novel integrated control of distribution static shunt compensator (DSTATCOM) is presented in th

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8

Bjerring, Jens Christian, and Wolfgang Schwarz. "Granularity Problems." Philosophical Quarterly 67, no. 266 (2016): 22–37. http://dx.doi.org/10.1093/pq/pqw028.

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Dhanakodi.V, N.Balachandar, and M.Gayathri. "Power Quality Monitoring and Feedback Control for Hybrid Renewal Energy System using Meta Heuristic Optimization Technique." International Journal of Scientific Methods in Intelligence Engineering Networks 01, no. 04 (2023): 33–44. http://dx.doi.org/10.58599/ijsmien.2023.1404.

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Solar and wind energy are becoming more popular. Hybrid Renewable Energy System (HRES) is a fast-growing power industry segment. Power quality (PQ) issues have increased as renewable energy has increased in the electricity supply. This study will help electrical engineers identify power quality (PQ) disruptions from hybrid renewable power sources like solar and wind. The investigation will predict powergeneration-induced PQ problems. A self-contained Hybrid Renewable Energy System (HRES) is the project’s main goal. We will collect and analyses energy system data using Grey Wolf Optimization to

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10

Karthik, N., Shaik Abdul Gafoor, and M. Surya Kalavathi. "Classification of Power Quality Problems by Wavelet Fuzzy Expert System." Advanced Materials Research 463-464 (February 2012): 1573–78. http://dx.doi.org/10.4028/www.scientific.net/amr.463-464.1573.

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Electric power quality, which is a current interest to several power utilities all over the world, is often severely affected by harmonics and transient disturbances. There is no unique model which can assess the power quality problem and to identify and classify them properly. Existing automatic recognition methods need improvement in terms of their versatility, reliability, and accuracy. The FUZZY LOGIC based tools have been applied for the PQ classification. This paper addresses Power quality problem classification by wavelet and fuzzy expert system. Major Key issues and challenges related

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11

Mayyadah Sahib Ibrahim and Ali Sachit Kaittan. "Efficient Classification of Power Quality Using Long Short-Term Memory Network Technique." Proceedings of Engineering and Technology Innovation 29 (February 10, 2025): 26–46. https://doi.org/10.46604/peti.2024.13831.

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This study aims to apply a new deep-learning technique to detect and categorize individual and complex PQ issues such as swell, flickers, surges, interruptions, and sags. The suggested technique, the long short-term memory (LSTM) network, is a novel artificial intelligence technique and an identifiable form of recurrent neural network. This technique is utilized to detect and identify power quality (PQ) issues based on three principal solutions: automatic feature extraction, voltage/current magnitude calculations, and PQ problem duration. Simulated PQ problems generated by the Matlab simulatio

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Mewes, Ricarda, Boris Friele, and Evert Bloemen. "Validation of the Protect Questionnaire: A tool to detect mental health problems in asylum seekers by non-health professionals." Torture Journal 28, no. 2 (2018): 56–71. http://dx.doi.org/10.7146/torture.v28i2.106884.

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Introduction: Prevalence rates of trauma-related mental disorders such as posttraumatic stress disorder (PTSD) or major depression (MD) are high in asylum seekers. The PROTECT Questionnaire (PQ) was designed to detect indications of those disorders in asylum seekers. Empirical data are needed to evaluate the PQ psychometrically. The objective of this study is to investigate the reliability, validity, sensitivity, and specificity of the PQ. Method: The PQ and validated questionnaires for PTSD (Posttraumatic Diagnostic Scale, PDS) and depression (Patient Health Questionnaire-9, PHQ- 9) wer

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13

Jiang, Shulun, Jian Yang, and Di-an Fang. "Transcriptome changes of Takifugu obscurus liver after acute exposure to the oxygenated-PAH 9,10-phenanthrenequione." Physiological Genomics 52, no. 8 (2020): 305–13. http://dx.doi.org/10.1152/physiolgenomics.00022.2020.

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Contamination with polycyclic aromatic hydrocarbons (PAHs) causes noticeable ecological problems in aquatic ecosystems. 9,10-Phenanthrenequione (9,10-PQ) is an oxidized PAH and is highly toxic to aquatic animals. However, the effects of 9,10-PQ on the molecular metabolism of fish remain largely unknown. In this study, Takifugu obscurus juveniles were acutely exposed to 44.30 µg/L 9,10-PQ for 3 days. The transcriptome profile changes in their livers were compared between the 9,10-PQ treatment group and the control using T. rubripes as the reference genome. The results identified 22,414 genes in

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14

Devi, T. Anuradha, G. Srinivasa Rao, T. Anil Kumar, et al. "Hybrid optimal-FOPID based UPQC for reducing harmonics and compensate load power in renewable energy sources grid connected system." PLOS ONE 19, no. 5 (2024): e0300145. http://dx.doi.org/10.1371/journal.pone.0300145.

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Integration of renewable energy sources (RES) to the grid in today’s electrical system is being encouraged to meet the increase in demand of electrical power and also overcome the environmental related problems by reducing the usage of fossil fuels. Power Quality (PQ) is a critical problem that could have an effect on utilities and consumers. PQ issues in the modern electric power system were turned on by a linkage of RES, smart grid technologies and widespread usage of power electronics equipment. Unified Power Quality Conditioner (UPQC) is widely employed for solving issues with the distribu

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15

MANIMALA, K., K. SELVI, and R. AHILA. "POWER DISTURBANCES PATTERN RECOGNITION USING SUPPORT VECTOR MACHINE." International Journal of Information Acquisition 08, no. 01 (2011): 53–64. http://dx.doi.org/10.1142/s0219878911002331.

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Recently, many signal processing techniques, such as fast Fourier transform, short-time Fourier transform, wavelet transform (WT), and wavelet packet transform (WPT), have been applied to detect, identify, and classify power quality (PQ) disturbances. For research on PQ analysis, it is critical to apply the appropriate signal processing techniques and classifier to solve PQ problems. The aim of this paper is to develop a classification method based on the combination of Hilbert transform (HT) and support vector machine (SVM) for the assessment of power quality events. Recent data mining litera

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16

Bläsius, Thomas, and Ignaz Rutter. "Simultaneous PQ-Ordering with Applications to Constrained Embedding Problems." ACM Transactions on Algorithms 12, no. 2 (2016): 1–46. http://dx.doi.org/10.1145/2738054.

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Kaleybar, Hamed Jafari, Morris Brenna, Federica Foiadelli, Seyed Saeed Fazel, and Dario Zaninelli. "Power Quality Phenomena in Electric Railway Power Supply Systems: An Exhaustive Framework and Classification." Energies 13, no. 24 (2020): 6662. http://dx.doi.org/10.3390/en13246662.

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Electric railway power systems (ERPS) as one of the most critical and high-power end-user loads of utility grids are characterized by outlandish power quality (PQ) problems all over the world. The extension and evolution of different supply topologies for these systems has resulted in significant and various forms of distortions in network voltage and current in all ERPS, the connected power system, and adjacent consumers. During the last years, numerous studies have been offered to investigate various aspects of PQs in a specific supplying topology. Variation in the supply structure of the ER

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18

Aldosary, Abdallah. "Power Quality Conditioners-Based Fractional-Order PID Controllers Using Hybrid Jellyfish Search and Particle Swarm Algorithm for Power Quality Enhancement." Fractal and Fractional 8, no. 3 (2024): 140. http://dx.doi.org/10.3390/fractalfract8030140.

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Power quality (PQ) is a major issue in today’s electrical system that affects both utilities and customers. The proliferation of power electronics devices, smart grid technology, and renewable energy sources (RES) have all contributed to the emergence of PQ concerns in today’s power system. The Unified Power Quality Conditioner (UPQC) is a versatile tool that can be used to fix distribution grid issues caused by irregular voltage, current, or frequency. Several tuning parameters, however, restrict the effectiveness of the Fractional-Order Proportional Integral Derivative (FOPID) control techni

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19

Khaleel, Mohamed. "Power Quality Enhancement Using Renewable Energy Sources and Electric Mobility." Brilliance: Research of Artificial Intelligence 3, no. 2 (2023): 306–15. http://dx.doi.org/10.47709/brilliance.v3i2.3252.

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In the present day, there is a growing emergence of obstacles pertaining to the remuneration of power quality (PQ) issues. In this context, the implementation of renewable energy sources (RES) solutions has a critical significance. The transition from traditional electrical power grids to smart grids necessitates the utilization of a significant quantity of power electronics converters and RES. These converters are essential for the incorporation of crucial technologies like renewable energies, electric mobility, and energy storage systems. Consequently, PQ concerns gain heightened significanc

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20

Bharatiraja, C., and Harish Chowdary V. "Real Time Power Quality Phenomenon for Various Distribution Feeders." Indonesian Journal of Electrical Engineering and Computer Science 3, no. 1 (2016): 10. http://dx.doi.org/10.11591/ijeecs.v3.i1.pp10-16.

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Power Quality (PQ) brings more challenges to the large- scale and medium scale industries because in the recent years most of them use high efficiency and low energy devices which cause vulnerable PQ disturbances at Point of Common Coupling (PCC). In this paper, the measurement at different times during load condition and analysis of all types of disturbances occurred has been done. When large rated equipments run, the disturbance (harmonics, RMS variations, and switching transients) levels are very high and poor power factor (PF) has also appeared. Due to this poor PF, reactive power consumpt

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21

Liubčuk, Vladislav, Virginijus Radziukynas, Gediminas Kairaitis, and Darius Naujokaitis. "Power Quality Impact and Its Assessment: A Review and A Survey of Lithuanian Industrial Companies." Inventions 10, no. 2 (2025): 30. https://doi.org/10.3390/inventions10020030.

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Poor PQ is a partial case of power system impact on society and the environment. Although the significance of good PQ is generally understood, the topic has not yet been sufficiently explored in the scientific literature. Firstly, this paper discusses the role of PQ in sustainable development by distinguishing economic, environmental, and social parts, including the existing PQ impact assessment methods. PQ problems must be studied through such prisms as financial losses of industrial companies, damage to end-use equipment, natural phenomena, interaction with animals, and social issues related

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Ranjan, Ashish, and Jayanti Choudhary. "Meta-heuristic based power quality improvement in UPQC based grid-connected hybrid renewable energy system." Intellectual Journal of Energy Harvesting and Storage 2, no. 1 (2024): 14–29. https://doi.org/10.11591/ehs.v2i1.pp14-29.

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In recent days, the integration of the grid-connected load system with hybrid renewable energy system (HY-RES) to improve reliability and reduce losses are cheered. In order to satisfy the requirement of the load demand, the HY-RES is incorporated with the grid-connected load which leads to the power quality (PQ) problems in the system. Hence, the UPQC based HPSO-GWO are proposed in this paper. With the utilization of the UPQC device, the PQ issues are minimized by satisfy the load need in the HY-RES system to solve the PQ issues is the major goal of this work. To mitigate the PQ issues, the H

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Alhaiz, Hussain A., Ahmed S. Alsafran, and Ali H. Almarhoon. "Single-Phase Microgrid Power Quality Enhancement Strategies: A Comprehensive Review." Energies 16, no. 14 (2023): 5576. http://dx.doi.org/10.3390/en16145576.

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Renewable distributed generators (RDGs) have made inroads in recent power systems owing to the environmental effect of traditional generators and their high consumption of electric energy. The widespread use of RDGs has been a recent trend in numerous nations. The integration complexity and the intermittent nature of RDGs can undermine the security and stability of microgrids (µGs). In order to guarantee the effectiveness, dependability, and quality of the electricity delivered, appropriate control methods are necessary. RDGs are being included in single-phase microgrids (1Ø-µGs) to generate e

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Howell, Robert. "The Russellian Monist's Problems with Mental Causation." Philosophical Quarterly 65, no. 258 (2014): 22–39. http://dx.doi.org/10.1093/pq/pqu058.

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Ibrahim, Nagwa F., Abdulaziz Alkuhayli, Abderrahmane Beroual, Usama Khaled, and Mohamed Metwally Mahmoud. "Enhancing the Functionality of a Grid-Connected Photovoltaic System in a Distant Egyptian Region Using an Optimized Dynamic Voltage Restorer: Application of Artificial Rabbits Optimization." Sensors 23, no. 16 (2023): 7146. http://dx.doi.org/10.3390/s23167146.

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Photovoltaic (PV) systems are crucial to the production of electricity for a newly established community in Egypt, especially in grid-tied systems. Power quality (PQ) issues appear as a result of PV connection with the power grid (PG). PQ problems cause the PG to experience faults and harmonics, which affect consumers. A series compensator dynamic voltage restorer (DVR) is the most affordable option for resolving the abovementioned PQ problems. To address PQ difficulties, this paper describes a grid-tied PV combined with a DVR that uses a rotating dq reference frame (dqRF) controller. The main

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Esmail, Yahia M., Ali H. Kasem Alaboudy, M. S. Hassan, and Gamal M. Dousoky. "Mitigating power quality disturbances in smart grid using FACTS." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 3 (2021): 1223. http://dx.doi.org/10.11591/ijeecs.v22.i3.pp1223-1235.

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Power quality (PQ) assurance is a vital part of electrical distribution networks. There are many advantages and benefits of improving PQ, especially in the modern/smart grid. Smart grid (SG) has a lot of complicated and sensitive electrical components (non-linear loads) in addition to renewable energy systems (wind-solar) that may also be a source of PQ disturbances. PQ problems harm personal life and national production. Static synchronous compensator (STATCOM) and unified power quality conditioner (UPQC) are among the fastest response flexible alternating current transmission systems (FACTS)

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Obiora, Gerard N., Festus O. Oghenegweke, Godwin O. Igbinosa, Tobenn Obidire, Collins B. Fiemobebefa, and Oluwaseun A. Bamido. "Reduction of Power Quality Perturbations: A Review." European Journal of Applied Science, Engineering and Technology 3, no. 3 (2025): 174–90. https://doi.org/10.59324/ejaset.2025.3(3).11.

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Power is usually generated by various power plants and transmitted at high voltages to the end users. This is made possible through a sophisticated network of diverse components utilized in a given power system. Also, every day, domestic and commercial activities such as cooking, transportation, manufacturing, illumination of offices and homes, air conditioning, refrigeration, and the likes, makes use of electricity. It is thus impossible that the power quality (PQ) will remain the same given that most components utilized across these processes are mostly and highly non-linear in nature. What

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Esmail, Yahia M., Ali H. Kasem Alaboudy, M. S. Hassan, and Gamal M. Dousoky. "Mitigating power quality disturbances in smart grid using FACTS." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 3 (2021): 1223–35. https://doi.org/10.11591/ijeecs.v22.i3.pp1223-1235.

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Power quality (PQ) assurance is a vital part of electrical distribution networks. There are many advantages and benefits of improving PQ, especially in the modern/smart grid. Smart grid (SG) has a lot of complicated and sensitive electrical components (non-linear loads) in addition to renewable energy systems (wind-solar) that may also be a source of PQ disturbances. PQ problems harm personal life and national production. Static synchronous compensator (STATCOM) and unified power quality conditioner (UPQC) are among the fastest response flexible alternating current transmission systems (FACTS)

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Vedant, S. Samudre*. "POWER QUALITY STANDARDS, PROBLEMS AND THEIR SOLUTIONS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 12 (2016): 219–27. https://doi.org/10.5281/zenodo.192584.

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Power quality is one of the major concerns and emerging issues in the present era. With increasing quantities of non-linear loads being added to electrical systems, it has become necessary to investigate the power quality issues as all electrical devices are prone to failure when exposed to one or more power quality problems. This paper highlights power quality problems, effect of power quality problems in different apparatuses and methods for its correction. This paper will be very much helpful for engineers, technicians, designers, researchers and system operators as it is necessary for them

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Obiora, Gerard N., Festus O. Oghenegweke, Godwin O. Igbinosa, Tobenn Obidire, Collins B. Fiemobebefa, and Oluwaseun A. Bamido. "Reduction of Power Quality Perturbations: A Review." European Journal of Applied Science, Engineering and Technology 3, no. 3 (2025): 174–90. https://doi.org/10.59324/ejaset.2025.3(3).11.

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Power is usually generated by various power plants and transmitted at high voltages to the end users. This is made possible through a sophisticated network of diverse components utilized in a given power system. Also, every day, domestic and commercial activities such as cooking, transportation, manufacturing, illumination of offices and homes, air conditioning, refrigeration, and the likes, makes use of electricity. It is thus impossible that the power quality (PQ) will remain the same given that most components utilized across these processes are mostly and highly non-linear in nature. What

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Guivant, Jose, Brett Seton, and Mark Whitty. "2D Path Planning Based on Dijkstra's Algorithm and Pseudo Priority Queues." Proceedings of the International Symposium on Combinatorial Search 3, no. 1 (2021): 206. http://dx.doi.org/10.1609/socs.v3i1.18255.

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This paper presents the application of the PPQ Dijkstra approach for solving 2D path planning problems. The approach is a Dijkstra process whose priority queue (PQ) is implemented through a Pseudo Priority Queue (PPQ) also known as Untidy PQ. The performance of the optimization process is dramatically improved by the application of the PPQ. This modification can be used for a family of problems. The path planning problem belongs to the family of feasible problems that can be solved by considering PPQ-Dijkstra approach. The solution provided by the PPQ-Dijkstra algorithm is optimal, i.e. it is

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Wei, Tian Cai, Shun Tao, Bin Su, and Chao Luo. "Current Detection Method and its Application of an Extension pq Theory." Applied Mechanics and Materials 668-669 (October 2014): 907–10. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.907.

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In the modern society, with the rapid development of industrial technology and information industry, electrical loads become more and more complex. As a result, the harmonics and reactive power problems have become increasingly serious. In the non-sinusoidal conditions, conventional power definitions don’t work well any more. Power theory is one of the foundations of financial accounts for energy, evaluation of the efficiency of power transmission and control of current compensation. Among them, the instantaneous reactive power theory is regarded as one of the most promising power theories. Wh

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DU, GAO-XIANG, HAO HE, LI-BING LIAO, and LI-JUAN WANG. "MECHANO-CHEMICAL PREPARATION OF POWDER QUARTZ/TiO2 COMPOSITE PARTICLES." Surface Review and Letters 20, no. 02 (2013): 1350016. http://dx.doi.org/10.1142/s0218625x13500169.

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Titanium dioxide pigment is a white pigment of high performance. However, its production could cause severe environmental and resource problems. In this paper, powder quartz/ TiO2 composite particles (PQ/TCP), a type of core (powder quartz)–shell( TiO2 ) composite powder, were prepared by a mechano-chemical method. The pigment properties of PQ/TCP and the mechanism of the mechano-chemical reaction between quartz and TiO2 were investigated. Orthogonal analyses of experimental vairables showed optimal pigment characteristics of PQ/TCP under the following conditions: 4 h of activation for powder

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Rajender, Kumar Beniwal1 Akanksha Aggarwal *1 Rohit Saini2 Sunita Saini3. "ANALYSIS OF ELECTRICITY SUPPLY IN THE DISTRIBUTION NETWORK OF POWER SECTOR." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 7, no. 2 (2018): 404–12. https://doi.org/10.5281/zenodo.1173535.

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Nowadays, consumers of electricity are demanding for better quality of services and this creates competition in power utility companies to provide better services which are reliable as well as efficient and less costly also to their consumers. Assessment of PQ problems is a tedious task and the various aspects of power system and equipment modelling, disturbance mitigation and data analysis are involved in it. The majority of the work is focused on the distribution system where the sensitive equipments experience interference under different kinds of power disturbances from the system and the

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Cahill, Kevin. "The Nature of Philosophical Problems: Their Causes and Implications." Philosophical Quarterly 66, no. 263 (2015): 406–8. http://dx.doi.org/10.1093/pq/pqv054.

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Chilakapati, Lenin Babu, and T. Gowri Manohar. "Power Quality Enhancement in a Grid-Integrated Solar-PV System with a Hybrid UPQC Control Strategy." Solar Energy and Sustainable Development Journal 13, no. 2 (2024): 120–37. http://dx.doi.org/10.51646/jsesd.v13i2.220.

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The supply grid network has been periodically experiencing frequent problems with Power Quality (PQ), and these problems have gotten worse over time due to the rise of electrical appliances. Thus, supplying consumers with electricity in the custom of sinusoidal voltages and currents that have adequate magnitudes and frequencies near the common point of coupling (PCC) stays one of the Utility system's main responsibilities. Thus, in order to improve PQ in the supply grid network, this article examines the practice of solar-PV coordinated Unified Power Quality Conditioner (UPQC). By means of opt

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Reddy, Ch Rami, B. Srikanth Goud, Flah Aymen, Gundala Srinivasa Rao, and Edson C. Bortoni. "Power Quality Improvement in HRES Grid Connected System with FOPID Based Atom Search Optimization Technique." Energies 14, no. 18 (2021): 5812. http://dx.doi.org/10.3390/en14185812.

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An intelligent control strategy is proposed in this paper which suggests the Optimum Power Quality Enhancement (OPQE) of grid-connected hybrid power systems with solar photovoltaic, wind turbines, and battery storage. Unified Power Quality Conditioner with Active and Reactive power (UPQC-PQ) is designed with Atom Search Optimization (ASO) based Fractional-order Proportional Integral Derivative (FOPID) controller in the proposed Hybrid Renewable Energy Sources (HRES) system. The main aim is to regulate voltage while reducing power loss and reducing Total Harmonic Distortion (THD). UPQC-PQ is us

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Gamasu, Ramesh. "Load flow Pseudo-inverse and Magnitude Conversions for Mitigation of PQ Problems using DVR." International Journal of Advanced Science and Technology 60 (November 30, 2013): 9–24. http://dx.doi.org/10.14257/ijast.2013.60.02.

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Gade, Swati, Rahul Agrawal, and Ravindra Munje. "Recent Trends in Power Quality Improvement: Review of the Unified Power Quality Conditioner." ECTI Transactions on Electrical Engineering, Electronics, and Communications 19, no. 3 (2021): 268–88. http://dx.doi.org/10.37936/ecti-eec.2021193.244936.

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The electrical power sector is currently focusing on power quality (PQ) issues and their mitigation. Industrial automation and the use of power electronic converters for the integration of distributed generation create various PQ problems. This necessitates PQ enhancement, which in turn helps to improve the life span of the equipment as well as the reliability of supply for feeding critical loads within the system. This paper presents a comprehensive review of the Unified Power Quality Conditioner (UPQC) and its widespread application in the distribution system. The UPQC belongs to the family

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DEKHANDJI, Fatma Zohra, Salim TALHAOUI, and Youcef ARKAB. "Power Quality Detection, Classification and Monitoring Using LABVIEW." Algerian Journal of Signals and Systems 4, no. 2 (2019): 101–11. http://dx.doi.org/10.51485/ajss.v4i2.86.

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In recent years, Power Quality becomes increasingly a major concern for both electric utilities and end users. Accordingly, the electrical engineering community has to deal with the analysis, diagnosis and solution of PQ issues using system approach rather than handling these issues as individual problems. This paper describes the analysis of PQ using advanced signal processing tools represented in Hilbert & Wavelet Transforms (HT-WT) and artificial intelligence tools represented in Artificial Neural Network & Support Vector Machine (ANN-SVM) for detection and classification of power q

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Singh, Pradeep, Krishan Arora, and Umesh C. Rathore. "Control Strategies for Improvement of Power Quality in Grid Connected Variable Speed WECS with DFIG – An Overview." Journal of Physics: Conference Series 2327, no. 1 (2022): 012008. http://dx.doi.org/10.1088/1742-6596/2327/1/012008.

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Abstract The presented paper gives a detailed observation of the PQ related problems for WE based on the EFIG or DFIG (Extra or Doubly Fed Induction Generator. Fundamental Frequency Components are the most typical reasons of disruption of power quality. On the other hand, wind loading conditions also disrupt the power quality. Numerous modes for the removing of these problems were studied to get the rid of these fundamental frequency components of the WES (Wind Energy Systems). In the presented paper, there is substantial analysis of numerous controlling techniques were presented to eliminate

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Arov, D. Z., B. Fritzsche, and B. Kirstein. "On Some Completion Problems for Various Subclasses of $j_{pq}$-inner Functions." Zeitschrift für Analysis und ihre Anwendungen 11, no. 4 (1992): 489–508. http://dx.doi.org/10.4171/zaa/589.

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Hosokawa, Takafumi, Tsuyoshi Tajika, Morimichi Suto, and Hirotaka Chikuda. "Surgical Treatment of Distal Radius Fractures Complicated by Concomitant Flexor Carpi Radialis Brevis: A Case Series and Surgical Techniques." Journal of Orthopaedic Case Reports 13, no. 11 (2023): 18–23. http://dx.doi.org/10.13107/jocr.2023.v13.i11.3990.

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Introduction: The flexor carpi radialis brevis (FCRB) is a rare anatomical variation, with a reported prevalence ranging from 0.9% to 8.7%. Our previous report showed three cases of FCRB in distal radius fracture (DRF) and found that hypoplastic pronator quadratus (PQ) adjacent to the FCRB muscle made it difficult to cover a volar locking plate (VLP). As we subsequently experienced additional six FCRBs, we report on new findings and surgical tips. Case Report: VLP fixation was performed on DRF with FCRB in nine limbs of eight patients. The prevalence was 2.9% (9 of 310 limbs). Of the seven pat

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Prasad, Devalraju, and C. Dhanamjayulu. "A Review of Control Techniques and Energy Storage for Inverter-Based Dynamic Voltage Restorer in Grid-Integrated Renewable Sources." Mathematical Problems in Engineering 2022 (September 29, 2022): 1–43. http://dx.doi.org/10.1155/2022/6389132.

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Power quality (PQ) is a key issue, particularly for technologically advanced process equipment, whose performance mainly depends on the quality of supply. Problems with PQ such as voltage swells/sags, interruptions, and harmonics are defined by any voltage, current, or frequency abnormalities causing damage or failure of the end-user equipment. Outages and interruptions lead to malfunctioning of end-user equipment or sensitive loads, such as diagnostic equipment in healthcare facilities, clinics, educational institutions, and detention centers, while further increasing significant economic los

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Kandukuri, Saritha, Ramesh Guguloth, A. Sivakumar, I. Shivasankkar, Ananthan Nagarajan, and N. Janaki. "An effective power quality enhancement system for integrated photovoltaic cells utilizing cascaded ANFIS in a unified power quality conditioner." Future Technology 4, no. 3 (2025): 171–81. https://doi.org/10.55670/fpll.futech.4.3.16.

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The arrival of power electronic devices for the control of loads has an effect on the Power Quality (PQ) at the utility grid’s distribution side. Meanwhile, PQ problems cause malfunctioning equipment, lost production time, loss of money for industry, inconvenience, and possible damage to household electrical appliances. Thus, the requirement for increased system efficiency is essential. Hence, this study proposes the control of a Unified Power Quality Conditioner (UPQC) in conjunction with a Photovoltaic (PV) system. Shunt and series converters attached back-to-back via a shared DC-link make u

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Tzinman, Rina. "Thinking Parts and Embodiment." Philosophical Quarterly 71, no. 1 (2020): 163–82. http://dx.doi.org/10.1093/pq/pqaa020.

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Abstract According to the thinking parts problem, any part sufficient for thought—e.g. a head—is a good candidate for being a thinker, and therefore being us. So we can’t assume that we—thinkers—are (or are constituted by) human beings rather than their proper parts. Many solutions to this problem have been proposed. However, I will show that the views currently on the market all face serious problems. I will then offer a new solution that avoids these problems. The thinking parts problem arises from considerations that seem to be empirically substantiated. One virtue of my solution is that in

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Ehtesham, Mohammad, and Md Junaid. "Advanced compensation scheme for enhancing photovoltaic power quality." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 3 (2022): 1223. http://dx.doi.org/10.11591/ijeecs.v27.i3.pp1223-1230.

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With the photovoltaic (PV) system becoming highly popular in distribution network, there is also a growing concern regarding its adverse impacts over the power quality (PQ) of integrated system. This deterioration in PQ hassparked a new interest in the filtering techniques used in the power systemfor mitigating these problems. In contrast to conventional passive filters now active power filters (APFs) are being looked as the predominant solution.This paper presents a state-estimation based effective compensation strategy for enhancing performance of employed APF scheme. A novel control techniq

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Mattar, El-Zahraa M., Ekramy S. Mahmoud, and Mohammed Ibrahim El-Sayed. "Mitigation of voltage sag and voltage swell by using dynamic voltage restorer." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 2 (2024): 1290. http://dx.doi.org/10.11591/ijpeds.v15.i2.pp1290-1299.

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Recent power quality (PQ) research shows that the most common types of power quality disturbances are voltage sags and swells in medium and low-voltage distribution grids. This paper shows how to improve two significant power quality disturbances: sags and swells voltage. To find out what effect these two PQ issues have in real life, a study case based on real nonlinear loads data from large induction motors at Beshai Company in Sadat City in Egypt is investigated. The dynamic voltage restorer (DVR) has been suggested as a solution to the voltage swell and voltage sag issues. The point of comm

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Ehtesham, Mohammad, and Mohammad Junaid. "Advanced compensation scheme for enhancing photovoltaic power quality." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 3 (2022): 1223–30. https://doi.org/10.11591/ijeecs.v27.i3.pp1223-1230.

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With the photovoltaic (PV) system becoming highly popular in distribution network, there is also a growing concern regarding its adverse impacts over the power quality (PQ) of integrated system. This deterioration in PQ has sparked a new interest in the filtering techniques used in the power system for mitigating these problems. In contrast to conventional passive filters now active power filters (APFs) are being looked as the predominant solution. This paper presents a state-estimation based effective compensation strategy for enhancing performance of employed APF scheme. A novel control tech

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Mattar, El-Zahraa M., Ekramy S. Mahmoud, and Mohamed I. El-Sayed. "Mitigation of voltage sag and voltage swell by using dynamic voltage restorer." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 2 (2024): 1290–99. https://doi.org/10.11591/ijpeds.v15.i2.pp1290-1299.

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Recent power quality (PQ) research shows that the most common types of power quality disturbances are voltage sags and swells in medium and low-voltage distribution grids. This paper shows how to improve two significant power quality disturbances: sags and swells voltage. To find out what effect these two PQ issues have in real life, a study case based on real nonlinear loads data from large induction motors at Beshai Company in Sadat City in Egypt is investigated. The dynamic voltage restorer (DVR) has been suggested as a solution to the voltage swell and voltage sag issues. The point of comm

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