Artykuły w czasopismach: „IMPACTS OF POWER QUALITY”

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Olaguer, Eduardo P., Eladio Knipping, Stephanie Shaw i Satish Ravindran. "Microscale air quality impacts of distributed power generation facilities". Journal of the Air & Waste Management Association 66, nr 8 (18.05.2016): 795–806. http://dx.doi.org/10.1080/10962247.2016.1184194.

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Gupta, Rajender. "Impacts of Fuel Quality on Power Generation and Environment". Energy & Fuels 23, nr 7 (16.07.2009): 3345–46. http://dx.doi.org/10.1021/ef900540y.

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Hao, Jiming, Litao Wang, Minjia Shen, Lin Li i Jingnan Hu. "Air quality impacts of power plant emissions in Beijing". Environmental Pollution 147, nr 2 (maj 2007): 401–8. http://dx.doi.org/10.1016/j.envpol.2006.06.013.

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Rugthaicharoencheep, Nattachote. "Impacts of Current and Voltage Harmonics for Industrial Power Network". Applied Mechanics and Materials 891 (maj 2019): 239–45. http://dx.doi.org/10.4028/www.scientific.net/amm.891.239.

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Power quality (PQ) has become a more important issue recently due to the use of more sophisticated and sensitive equipment. Medical devices, telecommunication servers and equipment, manufacturing and domestic appliances rely on a good supply of power. This paper presents the review of the power quality in power system. Power quality has always been important for customers, but with increasing applications of electronic loads and controllers sensitive to the power quality, the subject has attracted renewed interest in recent times. Power quality encompasses several aspects: harmonics, over voltage, flicker voltage sags and swells interruptions etc. A major factor contributing to the importance of the quality of power is the deregulation of the power industry. Customers will demand higher levels of power quality to ensure the proper and continued operation of sensitive equipment and processes.

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Isik, Ayla, Murat Ozdemir i Ibrahim Doymaz. "Infrared drying of bee pollen: effects and impacts on food components". Czech Journal of Food Sciences 37, No. 1 (6.03.2019): 69–74. http://dx.doi.org/10.17221/410/2017-cjfs.

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Infrared radiation drying being one of the innovative drying methods was chosen to perform comparative study at different infrared power levels at 50, 62, 74 and 88 W. Quality attributes such as protein, fat, ash, carbohydrate, vitamin C content, solubility index and colour of infrared dried bee pollen samples were evaluated. The infrared power has a significant effect on the drying and quality characteristics especially colour. Drying time was reduced from 170 to 50 min when the infrared power level increased from 50 W to 88 W. Morphological changes on the surface of bee pollen grains increased with increasing the infrared power. The bee pollen infrared dried at 50 W retained its quality characteristics better than the bee pollens infrared dried at other power levels.

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AKKAYA, Sıtkı. "Empirical Investigations: Power Quality Disturbance Classification". International Conference on Applied Engineering and Natural Sciences 1, nr 1 (20.07.2023): 320–24. http://dx.doi.org/10.59287/icaens.1014.

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In electrical power systems, one of the most essential parameters is a system signal with stable fundamental amplitude and frequency. Some disturbances have a negative impact on this stability, yet.These disturbances, known as power quality disturbances (PQDs), encompass phenomena such as sag, interruption, swell, harmonics, flicker, interharmonics, spike, notch, and transients. PQDs can ariseindividually or in some combinations. They pose unpredictable and variable effects on system componentsgiving rise to destructive outcomes. Acquisition of real-world datasets related to these disturbances is challenging due to the randomness and complex nature of power systems. Therefore, the importance of conducting experimental studies to investigate and analyze PQDs has significantly increased. This study aims to serve as a valuable resource for researchers investigating PQDs. It provides a guidance, offering insights into some types of PQDs and their characteristics. This paper supports researchers in understanding and addressing the challenges based on PQDs by presenting knowledge about these disturbances and their impacts. Recognizing the significance of experimental studies, the compilation includes methodologies, experimental setups, and tools employed for studying PQDs. It emphasizes the necessity for experimental datasets to enhance research in this field and highlights the importance of PQD investigation.

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Abdul Kadir, Aida Fazliana, Tamer Khatib i Wilfried Elmenreich. "Integrating Photovoltaic Systems in Power System: Power Quality Impacts and Optimal Planning Challenges". International Journal of Photoenergy 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/321826.

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This paper is an overview of some of the main issues in photovoltaic based distributed generation (PVDG). A discussion of the harmonic distortion produced by PVDG units is presented. The maximum permissible penetration level of PVDG in distribution system is also considered. The general procedures of optimal planning for PVDG placement and sizing are also explained in this paper. The result of this review shows that there are different challenges for integrating PVDG in the power systems. One of these challenges is integrated system reliability whereas the amount of power produced by renewable energy source is consistent. Thus, the high penetration of PVDG into grid can decrease the reliability of the power system network. On the other hand, power quality is considered one of the challenges of PVDG whereas the high penetration of PVDGs can lead to more harmonic propagation into the power system network. In addition to that, voltage fluctuation of the integrated PVDG and reverse power flow are two important challenges to this technology. Finally, protection of power system with integrated PVDG is one of the most critical challenges to this technology as the current protection schemes are designed for unidirectional not bidirectional power flow pattern.

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Balcells, José, Jaroslav Dolezal, Josef Tlusty i Viktor Valouch. "Impacts of Renewable Sources on Power Quality in Distribution Systems". Renewable Energy and Power Quality Journal 1, nr 02 (kwiecień 2004): 75–80. http://dx.doi.org/10.24084/repqj02.212.

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Frandsen, Flemming J. "Impacts of Fuel Quality on Power Production and the Environment". Energy & Fuels 27, nr 10 (7.10.2013): 5593–94. http://dx.doi.org/10.1021/ef4015873.

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Harding, Stan. "Fuel quality impacts on power production — The first 50 years". Fuel Processing Technology 141 (styczeń 2016): 177. http://dx.doi.org/10.1016/j.fuproc.2015.08.003.

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Kohli, Tanya Navin. "Causes and Impact of Quality Power System in the Country". Indian Journal of Applied Research 3, nr 11 (1.10.2011): 176–78. http://dx.doi.org/10.15373/2249555x/nov2013/59.

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Jain, Parita, Arun Sharma i Laxmi Ahuja. "A Customized Quality Model for Software Quality Assurance in Agile Environment". International Journal of Information Technology and Web Engineering 14, nr 3 (lipiec 2019): 64–77. http://dx.doi.org/10.4018/ijitwe.2019070104.

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The agile approach grew dramatically over traditional approaches. The methodology focuses more on rapid development, quick evaluation, quantifiable progress and continuous delivery satisfying the customer desire. In view of this, there is a need for measurement of the agile development process. In this respect, the present research work investigates the inter-relationships and inter-dependencies between the identified quality factors (QF), thereby outlining which of these QF have high driving power and dependence power, working indirectly towards the success of agile development process. This paper proposes a new agile quality model, utilizing an interpretive structural modeling (ISM) approach and the identified factors are classifies using Matriced' Impacts Croise's Multiplication Applique´e a UN Classement (MICMAC) approach. The research findings can significantly impact agile development process by understanding how these QF related to each other and how they can be adopted.

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Bass, R. M., i M. M. Begovic. "A senior design course bridging power systems and power electronics: power quality impacts of electric vehicle charging". IEEE Transactions on Power Systems 12, nr 3 (1997): 1040–45. http://dx.doi.org/10.1109/59.630441.

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Lucas, Alexandre, Germana Trentadue, Harald Scholz i Marcos Otura. "Power Quality Performance of Fast-Charging under Extreme Temperature Conditions". Energies 11, nr 10 (2.10.2018): 2635. http://dx.doi.org/10.3390/en11102635.

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Exposing electric vehicles (EV) to extreme temperatures limits its performance and charging. For the foreseen adoption of EVs, it is not only important to study the technology behind it, but also the environment it will be inserted into. In Europe, temperatures ranging from −30 °C to +40 °C are frequently observed and the impacts on batteries are well-known. However, the impact on the grid due to the performance of fast-chargers, under such conditions, also requires analysis, as it impacts both on the infrastructure’s dimensioning and design. In this study, six different fast-chargers were analysed while charging a full battery EV, under four temperature levels (−25 °C, −15 °C, +20 °C, and +40 °C). The current total harmonic distortion, power factor, standby power, and unbalance were registered. Results show that the current total harmonic distortion (THDI) tended to increase at lower temperatures. The standby consumption showed no trend, with results ranging from 210 VA to 1650 VA. Three out of six chargers lost interoperability at −25 °C. Such non-linear loads, present high harmonic distortion, and, hence, low power factor. The temperature at which the vehicle’s battery charges is crucial to the current it withdraws, thereby, influencing the charger’s performance.

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Alghsoon, Esra’a, Ahmad Harb i Mohammad Hamdan. "On stability and power quality impacts of vehicle to grid (V2G)". Applied Solar Energy 53, nr 2 (kwiecień 2017): 100–108. http://dx.doi.org/10.3103/s0003701x17020037.

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Esfandiari, Ahmad, Mostafa Parniani i Hossein Mokhtari. "Power Quality Impacts of an Electric Arc Furnace and Its Compensation". Journal of Electrical Engineering and Technology 1, nr 2 (1.06.2006): 153–60. http://dx.doi.org/10.5370/jeet.2006.1.2.153.

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Jamshidi, Ahmad, S. Masoud Barakati i M. Moradi Ghahderijani. "Impact of Distributed Power Flow Controller to Improve Power Quality Based on Synchronous Reference Frame Method". International Journal of Engineering and Technology 4, nr 5 (2012): 581–85. http://dx.doi.org/10.7763/ijet.2012.v4.437.

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Nakmofa, Micklon Edison, Johanis N. Kallau i Adrianus Amheka. "Kajian Kualitas Lingkungan Fisik-Kimia Akibat Pengoperasian Pembangkit Listrik Tenaga Surya Terpusat Di Desa Oelpuah Kecamatan Kupang Tengah Kabupaten Kupang". Bumi Lestari Journal of Environment 18, nr 2 (1.08.2018): 50. http://dx.doi.org/10.24843/blje.2018.v18.i02.p02.

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The utilization of renewable electric power plants (non-fossil) in friendly environment needs to be done by using of solar energy for electricity generation. PT. LEN Industry built solar power Plant on Oelpuah Village, Kupang Tengah Subdistrict, Kupang Regency, with a total capacity of 5 megawatts Peak, which currently operates and the biggest Solar Power Plant in Indonesian. As a result of the operation of these solar power, it can be expected to have environmental impacts. The purpose of this study was to determine the impact of Physical Chemistry like air quality, water quality and noise, inside and outside of solar power plant operation. The results showed, because of PLTS Operation, it has an impact to physical chemistry environmental quality, but the impaCT STILL below the threshold of environmental quality standards.

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Antonenkov, D. V., E. A. Biketova, V. R. Kiushkina i D. B. Solovev. "Climate Impacts on Quality of 6 kV Overhead Lines Operating at Mining Companies". IOP Conference Series: Earth and Environmental Science 988, nr 2 (1.02.2022): 022001. http://dx.doi.org/10.1088/1755-1315/988/2/022001.

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Abstract Technological innovation in the mining industry involves the extensive use of new high-power, energy-intensive, and high-performance mining machinery that should be reliable in its operation. The key mining company equipment includes mining excavators, drilling rigs, crushing and screening units, and mine drainage facilities. Providing the fault-free power supply and the efficient operation of the electrical infrastructure of a mining company is a priority, and it depends on the quality of the power supply system and its elements. Power supply system failures reduce the operational efficiency of mining machinery, processing sections, and the mining company as a whole, which results in reduced power consumption, uneven loading schedule, failures to meet the output plans, and increased prime costs for the products. The analysis of the electrical infrastructure power supply system at a mining company shall help us assess the quality of operations and their efficiency and develop actions to reduce the idle times of electrical equipment, provide uninterrupted power supply and plan the activities of the mining company in the wholesale electrical power market more accurately.

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Suganya, R., M. Anitha i P. Pugazhendiran. "Enhancement of Power Quality in Four Bus System Using Hybrid Power Flow Controller". IOP Conference Series: Earth and Environmental Science 1100, nr 1 (1.12.2022): 012028. http://dx.doi.org/10.1088/1755-1315/1100/1/012028.

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Abstract To mitigate the impacts of voltage sag, a hybrid power flow controller (HPFC) finds a spot between the sending and receiving terminals. This research work deals with the comparison of four bus systems employing UPFC and HPFC. Simulation is done for 4 bus system using UPFC and HPFC. The outcomes are associated with respect to the voltage, active power and Reactive power. The outcomes exemplifies the grander enactment of HPFC controlled 4 bus system compared to UPFC controlled 4 bus system.

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Muangthai, Isara, i Sue J. Lin. "Quantifying Total Environmental Impact of the Power Sector Using Input-Output Life Cycle Assessment: a case study for Thailand". E3S Web of Conferences 122 (2019): 05003. http://dx.doi.org/10.1051/e3sconf/201912205003.

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The electricity generation is vital to industries and economic development in Thailand. In this study, the input-output life cycle assessment (IO-LCA) is applied to estimate the direct and indirect impacts from the power generation sector for the years 2005 and 2010. Based on the input-output analysis, more than 90% of the total environmental impact of Thailandʼs power sector involves ten relevant sectors. Results reveal that the most significant environmental damage was on natural resources followed by human health, climate change, and ecosystem quality. The most dominant environmental impacts were non-renewable energy, global warming and respiratory inorganic effects. Furthermore, the power sector, which accounts for 80% and 61% of total each impact in 2010 respectively, had a large direct impact on climate change and human health. On the contrary, the coal and lignite, and metal ore sectors contributed significantly to indirect impacts on ecosystem quality and resources. Regarding the results, some additional suggestions can be made to improve current policies in Thailand, including the implementation of green manufacturing in the iron and steel production, and installing control devices in all power plant units. Consequently, IO-LCA can be applied to other industries for assessing their total environmental impacts, and planning CO2 mitigation strategies.

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Osaloni, Oluwafunso Oluwole, Ayodeji Stephen Akinyemi, Abayomi Aduragba Adebiyi i Oladapo Tolulope Ibitoye. "Power Loss Analysis with Dispersed Generation in Multifunction Power Conditioner Design to Improve Power Quality". WSEAS TRANSACTIONS ON POWER SYSTEMS 18 (30.06.2023): 94–103. http://dx.doi.org/10.37394/232016.2023.18.10.

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The recent modification in utilizing Multifunction Power Conditioner (MPC) such as Unified Power Quality Conditioner devices in power systems has led to different degrees of power losses, owing to electronic power impacts. This paper presents a detailed comparison of power loss analysis in various configurations of MPC, that is, the conventional unified power quality conditioner (UPQC) and the UPQC with distributed generation (〖UPQC〗_DG). The independent losses based on inverter design and distributed generation interfacing to the distribution form the basis for each configuration case. The investigation considered conventional UPQC as the base case for power losses, and the study was extended to 〖UPQC〗_DG at steady state operating condition. In all configurations, Switching Losses (SL) and conduction losses were considered using simulation studies carried out in MATLAB/SIMULINK, and the results obtained in all cases were used for comparative studies. Finally, the outcome indicates that the losses in 〖UPQC〗_DG is more than conventional UPQC based on simulation results in all cases.

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Wang, Peng, Zhi Yong Ren, Dong Mei Zhao, Wan Xing Sheng, Hui Yu i Hai Tao Liu. "Analysis on the Impacts of Different Distributed Generation Grid-Connected Modes on Power Quality". Applied Mechanics and Materials 716-717 (grudzień 2014): 1180–84. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.1180.

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This paper propose the power quality evaluation index used to evaluate the impacts of the different distributed generation grid-connected modes made on power quality in the distribution network. Simulation example is built on the basis of a real distribution network as prototype using DigSilent software. Then Comparative analysis of the impacts on voltage deviation, harmonic and short duration voltage fluctuations of decentralized integration mode and centralized integration mode are made. The simulation results show that the centralized mode has more influences on the distribution network power quality, especially when there is power generated by distributed generations flowing to the main grid.

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Letha, Shimi Sudha, Math H. J. Bollen, Tatiano Busatto, Angela Espin Delgado, Enock Mulenga, Hamed Bakhtiari, Jil Sutaria i in. "Power Quality Issues of Electro-Mobility on Distribution Network—An Overview". Energies 16, nr 13 (21.06.2023): 4850. http://dx.doi.org/10.3390/en16134850.

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The journey towards sustainable transportation has significantly increased the grid penetration of electric vehicles (EV) around the world. The connection of EVs to the power grid poses a series of new challenges for network operators, such as network loading, voltage profile perturbation, voltage unbalance, and other power quality issues. This paper presents a coalescence of knowledge on the impact that electro-mobility can impose on the grid, and identifies gaps for further research. Further, the study investigates the impact of electric vehicle charging on the medium-voltage network and low-voltage distribution network, keeping in mind the role of network operators, utilities, and customers. From this, the impacts, challenges, and recommendations are summarized. This paper will be a valuable resource to research entities, industry professionals, and network operators, as a ready reference of all possible power quality challenges posed by electro-mobility on the distribution network.

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Sanchez-Puentes, Yohan, Christian Argote-Parra, Waddy Lakatt-Benavides, Jaider Narvaez-Viana, Jose Nuñez-Alvarez i John Grimaldo-Guerrero. "Influence of Photovoltaic Systems on Power Quality Problems". International Journal of Energy Economics and Policy 13, nr 3 (17.05.2023): 185–90. http://dx.doi.org/10.32479/ijeep.14256.

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Photovoltaic (PV) systems have been rapidly implemented in commercial facilities without determining the negative impacts that may result when connected to the facilities' electrical power system. The research presented shows the results of a study of the quality of electrical energy in a commercial installation in which there were no problems before implementing the PV system. Measurements of different parameters of the energy generated by the photovoltaic system and that provided by the electrical network are carried out, carrying out a simulation using the Helioscope software. As a result of the work, voltage variation and current harmonics problems are identified, carrying out a technical and economic analysis of implementing a passive filter that performs the respective corrective actions.

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Zhu, Gui Ping, i Zong Xiang Lu. "Research of Impacts on Power Systems by Electric Vehicle Charging in China". Advanced Materials Research 512-515 (maj 2012): 2643–49. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2643.

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Battery Electric vehicle (BEV) has been set as one of the most prominent sectors of automobile industry in China in the future due to its significant contribution to energy safety, low carbon emission and leading technology status in vehicle driven by new energy. High penetration of BEV will have obvious impacts on power systems, and its load characteristics are quite different from those traditional loads. Therefore with an eye on the safe, stable and economic operation of power system, this paper studied the impacts of EV on power systems from four aspects: total electricity demand, power rush in short period, power quality and vehicle to grid (V2G) technology. Total electricity demand by BEV charging in 2020 in China was firstly estimated in the paper, and it is sure that power system has the capability to meet this demand. However uncontrolled massive BEV charging will probably results in higher peak load and upgrading requirement of power systems, so orderly charging is required. EV battery is charged through rectifier, which will decrease power quality by harmonic current, therefore power electronic equipment is required to ensure power quality. Finally possibility of scheme of vehicle to grid (V2G) application is discussed when the scale of BEV is large enough and performance of EV battery is greatly improved.

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Bussi, Gianbattista, i Paul G. Whitehead. "Impacts of droughts on low flows and water quality near power stations". Hydrological Sciences Journal 65, nr 6 (12.02.2020): 898–913. http://dx.doi.org/10.1080/02626667.2020.1724295.

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R. Sarkar, Ratna, i Mohammad Zahidur Rahman. "Transmission Power and Quality of Service In MANET Routing Protocols". International Journal of Wireless & Mobile Networks 14, nr 4 (31.08.2022): 19–26. http://dx.doi.org/10.5121/ijwmn.2022.14402.

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Wireless communication is significantly influenced by the Mobile Ad Hoc Network (MANET), which consists of nodes like mobile phones, tablets, computers, or other devices that can connect with one another. MANET is a decentralized network that communicates without using any specified infrastructure. The lack of battery power in this multihop network with no infrastructure is problematic. As a result, proper transmission power utilization must be considered. Transmission power significantly impacts the data dissemination of different routing protocols used in this MANET environment. By taking this issue into account, the performance of routing protocols is examined based on different transmission power settings. The packet delivery ratio (PDR), packet loss (PL), jitter, and Dealy all play a role in determining network service quality. This study investigates how transmission power impacts MANET routing protocols’ quality of Service (QoS). The MANET routing protocols investigated in this study include AODV, OLSR, DSDV, and DSR. NS3 is used to create the simulation environment. According to this analysis, AODV outperforms other routing protocols in overall performance.

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Khan, Md, Amran Hossain, Aasim Ullah, Molla Hossain Lipu, S. Siddiquee, M. Alam, Taskin Jamal i Hafiz Ahmed. "Integration of Large-Scale Electric Vehicles into Utility Grid: An Efficient Approach for Impact Analysis and Power Quality Assessment". Sustainability 13, nr 19 (1.10.2021): 10943. http://dx.doi.org/10.3390/su131910943.

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Electric vehicles (EVs) have received massive consideration in the automotive industries due to their improved performance, efficiency and capability to minimize global warming and carbon emission impacts. The utilization of EVs has several potential benefits, such as increased use of renewable energy, less dependency on fossil-fuel-based power generations and energy-storage capability. Although EVs can significantly mitigate global carbon emissions, it is challenging to maintain power balance during charging on-peak hours. Thus, it mandates a comprehensive impact analysis of high-level electric vehicle penetration in utility grids. This paper investigates the impacts of large-scale EV penetration on low voltage distribution, considering the charging time, charging method and characteristics. Several charging scenarios are considered for EVs’ integration into the utility grid regarding power demand, voltage profile, power quality and system adequacy. A lookup-table-based charging approach for EVs is proposed for impact analysis, while considering a large-scale integration. It is observed that the bus voltage and line current are affected during high-level charging and discharging of the EVs. The residential grid voltage sag increases by about 1.96% to 1.77%, 2.21%, 1.96 to 1.521% and 1.93% in four EV-charging profiles, respectively. The finding of this work can be adopted in designing optimal charging/discharging of EVs to minimize the impacts on bus voltage and line current.

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Rabie, Afaf, Abdelhady Ghanem, Sahar S. Kaddah i Magdi M. El-Saadawi. "Electric vehicles based electric power grid support: a review". International Journal of Power Electronics and Drive Systems (IJPEDS) 14, nr 1 (1.03.2023): 589. http://dx.doi.org/10.11591/ijpeds.v14.i1.pp589-605.

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<span lang="EN-US">Grid connected electric vehicles (EVs) can provide energy quality services to ease intermittent renewable energy sources dependent, enhance grid stability performance, reliability and load balancing in the power system. Moreover, incorporating sufficient EVs into the power grid will assist reduce greenhouse gases. However, the unrestrained EVs charging impact the raise of peak request, frequency deflection, voltage instability, power quality from the acceptable limits. It can also cause overloading of the power system equipment and an increase in power losses. In this paper, the influences EV technologies on various energy systems, control scheme strategy, benefits, and motivational challenges are investigated. An overview of the impacts of uncontrolled EV loading on the electric power system and how controlled charging becomes benefit impacts is presented. Moreover, a review of the controlled charge and discharge benefits of EVs and the electrical serving involved in reduction of frequency deviation, voltage stability, power quality improvement is introduced. This review shows that integration of optimal control of EVs with a suitable optimization technique can improve and provide on time multi ancillary services of EV integrated with weak grid. In addition, this review provides research tracks which can be followed by researchers.</span>

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Song, Xiao Hua, Dong Xiao Niu, Cai Qin Ye i Dong Liang Lu. "Survey on the Quality Management System of Power Distribution Projects Based on the Theory of TQM". Applied Mechanics and Materials 108 (październik 2011): 30–34. http://dx.doi.org/10.4028/www.scientific.net/amm.108.30.

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Power distribution engineering plays an important role in power system, whose construction quality directly impacts the investment income, social and environmental benefits. This paper firstly analyzed the necessity of quality management in power distribution engineering, and then introduced the application of total quality management to the quality management in power distribution engineering. Finally, by combining the basic points of TQM, applying the PDCA cycle and controlling the factors affecting quality management, this article built a basic system model for quality management in power distribution engineering.

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Zheng, Liang, i Farzana Akter. "Power Quality Control System of High-Power-Density Switching Power Supply for Green Environment". Mathematical Problems in Engineering 2022 (16.09.2022): 1–11. http://dx.doi.org/10.1155/2022/9692974.

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There is higher harmonics and electromagnetic interference caused by high-power-density switching power supply during high-frequency and normal operations which affects power quality of switching power supply and also impacts the environment. To solve this problem, this paper proposes a dual digital signal processor (DSP) controller suitable for unified power quality regulators and designs high-power-density switching power supply control system for promoting green environment. The overall structure of the system is divided into two parts, the power main circuit and the control circuit. In the main power circuit, the electromagnetic interference (EMI) filter is used to filter the input AC voltage and convert it into a stable DC voltage. A high-frequency inverter is used to invert the DC voltage into a high-frequency AC voltage to achieve harmonic control and reactive power compensation. In the control circuit, dual DSP controller is used to improve real-time detection, control of the output voltage, and current and driver temperature of the high-power-density switching power supply, while high-precision analysis and processing system collect different information and then achieve the power quality control of the switching power supply based on system software to keep this environment green. The experimental results suggest that the harmonic content of the experimental objects controlled by the system is reduced by 16.7% compared with the existing power quality control and the absolute error of the system is less than 0.02 V which improves the de-noising performance. The power generation systems require that the consumption of natural resources and renewable energy solutions can assist in saving the natural resources.

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Ehtesham, Mohammad, i Md Junaid. "Advanced compensation scheme for enhancing photovoltaic power quality". Indonesian Journal of Electrical Engineering and Computer Science 27, nr 3 (1.09.2022): 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 technique for PQ enhancement is proposed where Kalman filtering approach has been applied for generating the reference signals. Also, an adaptive hysteresis band technique has been applied here in the switching strategy. Thus an enhanced filter performance is achieved with reduced complexity and better elimination of distortions. Simulated results obtained in MATLAB/Simulink platform have been analyzed completely, where the superiority of filtering algorithm has been also demonstrated through leasttotal harmonic distortion (THD) achieved in source current among all the existing Kalman filters.

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Frantál, Bohumil, Jiří Malý, Martin Ouředníček i Jiří Nemeškal. "Distance matters. Assessing socioeconomic impacts of the Dukovany nuclear power plant in the Czech Republic: Local perceptions and statistical evidence". Moravian Geographical Reports 24, nr 1 (1.03.2016): 2–13. http://dx.doi.org/10.1515/mgr-2016-0001.

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AbstractThe effect of geographical distance on the extent of socioeconomic impacts of the Dukovany nuclear power plant in the Czech Republic is assessed by combining two different research approaches. First, we survey how people living in municipalities in the vicinity of the power plant perceive impacts on their personal quality of life. Second, we explore the effects of the power plant on regional development by analysing long-term statistical data about the unemployment rate, the share of workers in the energy sector and overall job opportunities in the respective municipalities. The results indicate that the power plant has had significant positive impacts on surrounding communities both as perceived by residents and as evidenced by the statistical data. The level of impacts is, however, significantly influenced by the spatial and social distances of communities and individuals from the power plant. The perception of positive impacts correlates with geographical proximity to the power plant, while the hypothetical distance where positive effects on the quality of life are no longer perceived was estimated at about 15 km. Positive effects are also more likely to be reported by highly educated, young and middle-aged and economically active persons, whose work is connected to the power plant.

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Leou, Rong-Ceng, Jen-Hao Teng, Heng-Jiu Lu, Bo-Ren Lan, Hong-Ting Chen, Ting-Yen Hsieh i Chun-Lien Su. "Stochastic analysis of electric transportation charging impacts on power quality of distribution systems". IET Generation, Transmission & Distribution 12, nr 11 (19.06.2018): 2725–34. http://dx.doi.org/10.1049/iet-gtd.2018.0112.

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Huang, Lin, Jianlin Hu, Mindong Chen i Hongliang Zhang. "Impacts of power generation on air quality in China—part I: An overview". Resources, Conservation and Recycling 121 (czerwiec 2017): 103–14. http://dx.doi.org/10.1016/j.resconrec.2016.04.010.

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Hu, Jianlin, Lin Huang, Mindong Chen, Gang He i Hongliang Zhang. "Impacts of power generation on air quality in China—Part II: Future scenarios". Resources, Conservation and Recycling 121 (czerwiec 2017): 115–27. http://dx.doi.org/10.1016/j.resconrec.2016.04.011.

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Tarraso, Andres, Ngoc-Bao Lai, Gregory N. Baltas i Pedro Rodriguez. "Power Quality Services Provided by Virtually Synchronous FACTS". Energies 12, nr 17 (27.08.2019): 3292. http://dx.doi.org/10.3390/en12173292.

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The variable and unpredictable behavior of renewable energies impacts the performance of power systems negatively, threatening their stability and hindering their efficient operation. Flexible ac transmission systems (FACTS) devices are able to emulate the connection of parallel and series impedances in the transmission system, which improves the regulation of power systems with a high share of renewables, avoiding congestions, enhancing their response in front of contingencies and, in summary, increasing their utilization and reliability. Proper control of voltage and current under distorted and unbalanced transient grid conditions is one of the most critical issues in the control of FACTS devices to emulate such apparent impedances. This paper describes how the synchronous power controller (SPC) can be used to implement virtually synchronous FACTS. It presents the SPC functionalities, emphasizing in particular the importance of virtual admittance emulation by FACTS devices in order to control transient unbalanced currents during faults and attenuate harmonics. Finally, the results demonstrate the effectiveness of SPC-based FACTS devices in improving power quality of electrical networks. This is a result of their contribution to voltage balancing at point of connection during asymmetrical faults and the improvement of grid voltage quality by controlling harmonics flow.

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Alame, Dima, Maher Azzouz i Narayan Kar. "Assessing and Mitigating Impacts of Electric Vehicle Harmonic Currents on Distribution Systems". Energies 13, nr 12 (23.06.2020): 3257. http://dx.doi.org/10.3390/en13123257.

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Harmonic currents of electric vehicle (EV) chargers could jeopardize the power quality of distribution systems and add to the transformer’s losses, thus degrading its lifetime. This paper assesses and mitigates the impacts of different EV chargers on distribution transformers and the voltage quality of distribution systems. The effect of state-of-charge (SOC) of the EV battery is considered through applying weighted arithmetic mean to accurately assess the impacts of EV harmonic currents on aging and losses of the EV interfacing transformer. The voltage quality of the IEEE 33-bus distribution system, supplying several EV parking lots, is also assessed at different charging levels using a fast-decoupled harmonic power flow. A new optimal harmonic power flow algorithm—that incorporates photovoltaic-based distribution generation units (DGs)—is developed to enhance the voltage quality of distribution systems, and elongate the lifetime of the substation transformer. The effectiveness of the proposed mitigation method is confirmed using the IEEE 33-bus distribution system, hosting several EV charging stations and photovoltaic-based DGs.

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ARTYUKHOV, Ivan I., i Svetlana V. MOLOT. "ELECTRIC POWER QUALITY IN ELECTRIC POWER SYSTEMS OF BOILER STATIONS AND HEATING SUBSTATIONS USING PUMPS OPERATED BY VARIABLE-FREQUENCY DRIVE". Urban construction and architecture 7, nr 1 (15.03.2017): 138–44. http://dx.doi.org/10.17673/vestnik.2017.01.23.

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Power electronics devices are widespread in diff erent engineering systems for housing and public utilities. But they have negative impacts on the power source. A typical example is using of the pumps, operated by variable frequency drive, in boiler stations and heating substations. The using helps both the energy savings and the electric power quality declination. If boiler station is supplied by emergency generator the electric power quality declination signifi cantly increases. Electric power quality parameters are analyzed using a simulation model, built in MATLAB/Simulink, in diff erent situations. The recommendations to ensure the specifi ed electric power quality in the electric power system are created.

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Guo, Yan Yan, Xiao Yan Chen i Yong Zheng Yang. "A Low Noise Power Design for Electrical Impedance Tomography System". Applied Mechanics and Materials 670-671 (październik 2014): 1159–62. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.1159.

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This paper describes a quality power module design for Biological Electrical Impedance Tomography (BEIT) system based on FPGA. As the electrical signals on the boundary of subject are too weak to measure effectively, it is essential to design a data acquisition system with high SNR and extremely low noise. This paper is focus on the power module design because the quality of the power module impacts the performance of the data acquisition system directly. The BEIT system needs several kinds of power supply to work effectively, such as 12V, 5V. In this paper, the power module is supplied by DC18V, using Buck-type DC/DC and LDO technologies, a set of independent power supply scheme is carried out, and provides stability and low noise power sources. The expected powers with ripple less than 20mV are achieved, which can preferably meet the BEIT system power supply requirements.

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Guan, Jin Lung, Ming Ta Yang, Jyh Cherng Gu i Hsin Hung Chang. "A Study of Actual Wind Generators on the Voltage Flicker of Power Systems". Advanced Materials Research 516-517 (maj 2012): 1292–96. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1292.

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One of the most important power quality issues is voltage flicker. Nowadays this issue also impacts the power system all over the world. The fact of the matter is that the more and the larger capacity of wind generator has been installed. Under unstable wind power situation, the variation of output current and voltage have caused trouble to voltage flicker. Hence, the major purpose of this study is to analyze the impact of wind generator on voltage flicker of power system.

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Farhoodnea, Masoud, Azah Mohamed, Hussain Shareef i Hadi Zayandehroodi. "Power quality impacts of high-penetration electric vehicle stations and renewable energy-based generators on power distribution systems". Measurement 46, nr 8 (październik 2013): 2423–34. http://dx.doi.org/10.1016/j.measurement.2013.04.032.

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Uzum, Busra, Ahmet Onen, Hany M. Hasanien i S. M. Muyeen. "Rooftop Solar PV Penetration Impacts on Distribution Network and Further Growth Factors—A Comprehensive Review". Electronics 10, nr 1 (31.12.2020): 55. http://dx.doi.org/10.3390/electronics10010055.

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In order to meet the electricity needs of domestic or commercial buildings, solar energy is more attractive than other renewable energy sources in terms of its simplicity of installation, less dependence on the field and its economy. It is possible to extract solar energy from photovoltaic (PV) including rooftop, ground-mounted, and building integrated PV systems. Interest in rooftop PV system applications has increased in recent years due to simple installation and not occupying an external area. However, the negative effects of increased PV penetration on the distribution system are troublesome. The power loss, reverse power flow (RPF), voltage fluctuations, voltage unbalance, are causing voltage quality problems in the power network. On the other hand, variations in system frequency, power factor, and harmonics are affecting the power quality. The excessive PV penetration also the root cause of voltage stability and has an adverse effect on protection system. The aim of this article is to extensively examines the impacts of rooftop PV on distribution network and evaluate possible solution methods in terms of the voltage quality, power quality, system protection and system stability. Moreover, it is to present a comparison of the advantages/disadvantages of the solution methods discussed, and an examination of the solution methods in which artificial intelligence, deep learning and machine learning based optimization and techniques are discussed with common methods.

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Feng, Wei Yuan, Xue Feng Dong, Xu Dong Yu, Shuang Wen Wang i Zhong Jing Liu. "Impact Factor Estimation on Power Quality to Electric Power Market". Applied Mechanics and Materials 448-453 (październik 2013): 2667–72. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2667.

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Power quality and power marketing are comprehensive concept contains multiple indexes. This paper builds the index system of the power quality promoting the power market development. And the structural equation modeling (SEM) be used to calculate the impact factor of power quality to marketing at different times and areas. This paper firstly puts power quality and marketing which are regarded as latent variables. And select the power quality index that includes the amplitude, frequency, spectrum, modulation, the notch depth and marketing index that includes market share, electricity consumption per capita, customer satisfaction rate, install electricity rate, customer loss rate as measured variables of latent variables, and establish the causal influence path graph of power quality and power marketing. According to the path graph, which reflecting causal relationships among the latent variables and the measurement equation reflecting relationship between the latent variable and significant variables. To test the significance and the rationality of the parameter and evaluate the overall performance of the structure equation model. Finally, according to the path graph and the path coefficient, we get causal influence coefficient between the power quality comprehensive index and power marketing comprehensive index.

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Ngoc Vu, Khue Hoang, Hang Thi Thuy Nguyen, Tam Thoai Nguyen i Bang Quoc Ho. "Application TAPM-AERMOD system model to study impacts of thermal power plants in SouthEast and SouthWest areas to the air quality of HCMC: current status and according to Vietnam power planning VII toward 2030". IOP Conference Series: Earth and Environmental Science 964, nr 1 (1.01.2022): 012024. http://dx.doi.org/10.1088/1755-1315/964/1/012024.

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Abstract Vietnam’s urban areas have faced serious environmental pollution issues, including water pollution, municipal waste, and air pollution. Vietnam’s real gross domestic product (GDP) has been experiencing positive growth for the past five years since 2016. And in 2019, Vietnam’s real GDP increased by 7.02% compared to the previous year. To maintain the growth rate, there is a huge amount of electricity required, not accounting for the other sectors. Thermal power plants generate more than 50% of total electricity in Vietnam, therefore, it is said that coal-fired power plants have been the major sources of air emissions and caused a serious impact on the environment. Recently air pollution is a hot issue in Ho Chi Minh City (HCMC), the air quality is being polluted by PM2.5, O3, CO, NO2, and TSP. Despite that, the neighboring areas of the city will install more coal-fired power plants, threatening to degrade the quality of the environment. Therefore, the objectives of this study are (i) Modeling the impacts of thermal power plants in SouthEast and SouthWest areas on the air quality of HCMC for two scenarios (current status in 2019 and future according to Power planning VII (adjusted) toward 2030); And (ii) Develop interprovincial air quality protection solutions. The research applied the TAPM model for meteorological modeling and AERMOD model for air pollution dispersion. The annual average PM2.5 concentration in the study area was approximately 0.121 μg/m3 and the highest concentration at a location close to Vinh Tan thermal power center with 8.61 μg/m3. NO2 the annual average concentration from power plants in 2020 and 2030 blows to HCMC and contributes to HCMC’ air quality only 0.01 and 0.03 μg/m3, respectively. The 24 hours average concentration of SO2 from power plants in 2030 blows to HCMC and contributes to HCMC’ air quality of 10 μg/m3. The 24 hours average SO2 levels of HCMC in 2030 is 39.2 μg/m3, higher than WHO’s guideline (20 μg/m3). Currently, air pollution in HCMC is polluted by PM2.5, SO2, and NO2 and cause bad effect to public health. However, in the future with the contribution of 33 thermal power plants under intercity/provinces air pollution dispersion, air pollution HCMC will be worse and affect public health. Air pollution HCMC will be a huge impact on HCMC’s public health in the future due to the contribution of 33 thermal power plants under intercity/provinces air pollution dispersion. The paper developed 7 main mitigation measures to reduce the impacts of air pollution from the power plan and reduce the impacts of air pollution on HCM’s public health. The measures are focused on using clean fuel, advanced technology, and controlling trans-provincial air pollution.

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Saravanan, V., K. M. Venkatachalam, M. Arumugam, M. A. K. Borelessa i K. T. M. U. Hemapala. "Impact of renewable energy in Indian electric power system". International Journal of Advances in Applied Sciences 10, nr 4 (1.12.2021): 297. http://dx.doi.org/10.11591/ijaas.v10.i4.pp297-309.

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<p>This paper addresses the impact of renewable power generation such as photovoltaic and wind energy in the existing power system operations. Various modeling approaches and power quality/reliability analysis of these renewable energy sources in the electric power system by researchers and research organisations and utilities are outlined and their impacts are assessed. Challenges and protection schemes of renewable power integration into the existing grid are discussed through a detailed literature review and study of renewable integration into the Indian power system are outlined including potential planning and policy actions to support renewable energy integration in India.</p>

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Alshareef, Sami M. "Analyzing and Mitigating the Impacts of Integrating Fast-Charging Stations on the Power Quality in Electric Power Distribution Systems". Sustainability 14, nr 9 (6.05.2022): 5595. http://dx.doi.org/10.3390/su14095595.

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The research presented in this paper focuses on the impacts of fast-charging stations on three power quality phenomena, namely voltage magnitude variations, voltage unbalance, and voltage fluctuation. The Markov Chain Monte Carlo is proposed to estimate the energy requirements of each fast-charging station when it is utilized to charge electric vehicles, considering their sto-chastic parameters such as battery capacities, state-of-charge levels at time of arrivals, and time of arrivals at charging stations. Two charging methods are implemented in this work: charging with an estimated output power and charging with an actual output power. The results reveal that the impact of fast-charging stations on voltage fluctuation by either of these charging methods can lead to light flickers. When the estimated output power is utilized, the light flicker is higher compared to when the actual output power is utilized; the proposed mitigation method is to integrate distribution static compensators, which can effectively eliminate the light flickers, whether the output power of the fast-charging station is estimated or actual. Not only will the system’s power quality be improved by installing distribution static compensators, but also the electricity consumers will not be annoyed by the light flicker, even when the rated power of the fast-charging stations is increased; this can positively lead to a reduction in charging time and an increase in customer satisfaction with electric vehicles, lending them to be more widely adopted.

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Abdulhamid, Mohanad, i Koech Benard. "Study of stability analysis of power system with increasing wind power". International Review of Applied Sciences and Engineering 11, nr 1 (kwiecień 2020): 1–3. http://dx.doi.org/10.1556/1848.2020.00001.

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AbstractThe use of energy in the world today is increasing with increase in population. The cost and availability of energy significantly impacts our quality of life, the health of national economies and the stability of our environment. The rapid depletion of fossil fuel resources on a worldwide basis has necessitated an urgent search for alternative energy sources to cater to the present day demands. In recent years there has been a significant global commitment to develop clean and alternative sources of energy such as solar and wind. Wind energy technology has been the fastest growing energy source because it is fairly distributed around the world and readily available for use. However, more penetration of wind energy into existing power networks has some impacts on the stability of the power system. Therefore, this paper studies and analyzes the stability of a power system with increasing wind penetration. The paper presents some analyses of a power system and the dynamic behavior which identify the issues that limit the large-scale integration of wind generators in a power system.

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Abdelkader, Ben Slimane, i Chelleli Benachiba. "Power Quality Enhancement Using the Interline Power Flow Controller". International Journal of Power Electronics and Drive Systems (IJPEDS) 6, nr 3 (1.09.2015): 415. http://dx.doi.org/10.11591/ijpeds.v6.i3.pp415-422.

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Interline Power Flow Controller (IPFC) is one of the latest generation Flexible AC Transmission system (FACTS). It is able to control simultaneously the power flow of multiple transmission lines. This paper presents a study of the impact the IPFC on profile of voltage, real and reactive power flow in transmission line in power system. The obtained results are interesting.

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