Relevant bibliographies by topics / Electric power systems – Quality control

Academic literature on the topic 'Electric power systems – Quality control'

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Published: 4 June 2021
Last updated: 29 January 2023

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Journal articles on the topic "Electric power systems – Quality control"

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Garcia-Torres, Felix, Sergio Vazquez, Isabel M. Moreno-Garcia, Aurora Gil-de-Castro, Pedro Roncero-Sanchez, and Antonio Moreno-Munoz. "Microgrids Power Quality Enhancement Using Model Predictive Control." Electronics 10, no. 3 (February 1, 2021): 328. http://dx.doi.org/10.3390/electronics10030328.

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In electric power systems, any deviation with respect to the theoretical sinusoidal waveform is considered to be a disturbance in the power quality of the electrical grid. The deviation can alter any of the parameters of the waveform: frequency, amplitude, and symmetry among phases. Microgrid, as a part of the electric power system, has to contribute providing an adequate current waveform in grid connected-mode, as well as to guarantee similar voltage features than the standard requirement given for public distribution grids under normal exploitation conditions in islanded mode. Adequate power quality supply is necessary for the correct compatibility between all the devices connected to the same grid. In this paper, the power quality of microgrids is managed using a Model Predictive Control (MPC) methodology which regulates the power converters of the microgrids in order to achieve the requirements. The control algorithm is developed for the following microgrids working modes: grid-connected, islanded, and interconnected. The simulation results demonstrate that the proposed methodology improves the transient response in comparison with classical methods in all the working modes, minimizing the harmonic content in the current and the voltage even with the presence of non-balanced and non-harmonic-free three-phase voltage and current systems.
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Savenko, A. E., and P. S. Savenko. "Features of operation of ship electrical power systems with electrical propulsion systems." Power engineering: research, equipment, technology 24, no. 3 (June 14, 2022): 91–100. http://dx.doi.org/10.30724/1998-9903-2022-24-3-91-100.

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THE PURPOSE. Consider the issue of the presence of distortions in the form of sinusoidal voltage and current in autonomous electrical power systems with electrical propulsion systems, built on the principle of the unified electric power system. Compare the results of the study of voltage distortion for electrical power systems with electrical propulsion systems of various structures and give recommendations for their application.METHODS. For research, unified electric power systems with DC electrical propulsion systems on the Yeysk ferry and alternating current on the asymmetric icebreaker Baltika are considered. The possibilities of programming with frequency control of modern drives of rudder propellers with AC motors are analyzed.RESULTS. Oscillograms of voltages and currents of generators were obtained using thyristor converters and inverters to control electrical propulsion systems in various modes. Significant ripples and distortions of the sinusoidal voltage and generator currents were noted when thyristor converters are used to power DC propulsion electric motors. Also, small deviations from the sinusoidal form of the ship's network voltage were recorded when inverters were used to control AC propulsion motors as part of rudder propellers.CONCLUSION. The issue of ensuring the quality of electricity produced in autonomous electrical power systems of sea vessels is of great relevance and importance. To ensure the best results, it is advisable to use azimuthing podded drive with AC electric motors, the rotation speed of which is implemented by inverter frequency converters with a DC link.
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Afanasov, A. M., S. V. Arpul, V. Y. Vasyliev, O. O. Hololobova, and S. M. Holik. "Automated Control Systems for Mutual Loads of Traction Electric Machines." Science and Transport Progress, no. 1(97) (October 17, 2022): 50–58. http://dx.doi.org/10.15802/stp2022/265336.

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Purpose. Testing of electric machines should be as objective as possible and contain reliable information about the quality of manufacture or repair of electric machines. During the tests, the parameters of the total power of the test bench sources, energy efficiency of each test process, the difference in thermal loads of the armature windings and excitation windings change. To perform the full test of the electric machine, it is necessary to equip test benches with systems for automatic control of the process of mutual loading. The analysis of different variants of automatic control systems is performed in the work. Methodology. Theoretical studies of electromagnetic processes using a mathematical model of the system “voltage source – traction motor” were performed. This system allows determining the energy performance of electric machines in the entire range of changes in loads and voltages during the tests. The methods of theoretical research and analytical calculation of electrical circuits, theoretical foundations of electrical engineering, mathematical modelling of electrical and energy processes were used in the analysis. Findings. The analysis of rational variants of functional schemes’ construction of automatic control systems with various quantity of power supplies, automatic control loops, mechanical and electric power converters is performed. Rational functional schemes of automatic control systems for testing various collector electric machines of direct and pulsating current are developed. Originality. Rational variants of construction of test benches with electric and mechanical moment converters taking into account variable processes of loading of electric cars during the test are offered. The analysis of energy efficiency of various variants of construction of test benches for testing electric machines in entire range of change of test loadings and voltage of power supplies in the case of using the automatic control system of mutual loading process is performed. Practical value. The conducted research will allow creating recommendations for the design of automated control systems for test benches in order to improve the technical and economic characteristics, reduce the consumption of electricity consumed for testing.
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Shende, Divya, Prashant Jagtap, and Rutuja Hiware. "Enhanced power quality using unified power flow controller systems." Journal of Physics: Conference Series 2089, no. 1 (November 1, 2021): 012035. http://dx.doi.org/10.1088/1742-6596/2089/1/012035.

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Abstract Electrical system frequently finds and issue due to unstable nature and power quality because of, in relation to great number of nonlinear charges. So, there is need to limit inside of these difficulties and produce fine voltage quality concerns. The Flexible Alternate Flow Transmission Systems (FACTS) are the framework made out of static gear works for the AC transmission of electrical energy. Unified_Power_Flow Controls (UPFC) are the excellent FACTS tools to attach series and shunt together and it could use for framing Power transmission sensitive and active power. Here in the paper, Unified Power Flow Control (UPFC) used to clear the voltage sink and Surge. Unified Control was developed and engineered using amplifiers and rectifiers. The real and reactive modifications in congruous control orientations at the receiver side. Use of Simulink of MATLAB checks quality of energy in the use of Unified Control.
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Afonso, Joao L., Mohamed Tanta, José Gabriel Oliveira Pinto, Luis F. C. Monteiro, Luis Machado, Tiago J. C. Sousa, and Vitor Monteiro. "A Review on Power Electronics Technologies for Power Quality Improvement." Energies 14, no. 24 (December 20, 2021): 8585. http://dx.doi.org/10.3390/en14248585.

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Nowadays, new challenges arise relating to the compensation of power quality problems, where the introduction of innovative solutions based on power electronics is of paramount importance. The evolution from conventional electrical power grids to smart grids requires the use of a large number of power electronics converters, indispensable for the integration of key technologies, such as renewable energies, electric mobility and energy storage systems, which adds importance to power quality issues. Addressing these topics, this paper presents an extensive review on power electronics technologies applied to power quality improvement, highlighting, and explaining the main phenomena associated with the occurrence of power quality problems in smart grids, their cause and effects for different activity sectors, and the main power electronics topologies for each technological solution. More specifically, the paper presents a review and classification of the main power quality problems and the respective context with the standards, a review of power quality problems related to the power production from renewables, the contextualization with solid-state transformers, electric mobility and electrical railway systems, a review of power electronics solutions to compensate the main power quality problems, as well as power electronics solutions to guarantee high levels of power quality. Relevant experimental results and exemplificative developed power electronics prototypes are also presented throughout the paper.
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Su, Chun Lien, and Ruei Hung Weng. "A Novel Control Model for Electric Propulsion Systems in All-Electric Ships." Advanced Materials Research 433-440 (January 2012): 2541–45. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.2541.

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In recent sea and undersea vehicles, implementation of all-electric ships (e-ships) technologies that employ various types of semiconductor switching devices based power conversion modules has brought revolution. These power converters that are nonlinear loads can produce non-sinusoidal distorted currents and these currents are then delivered and broadcasted through the power network and thus bus voltages are distorted. This effect can be more obvious while large loads fed and controlled through power conversion modules, such as electric propulsion system, operate for different purposes of missions. In order to improve the harmonic distortion due to operation of electric propulsion systems, a novel control model for electric propulsion motors is proposed in this paper. The electric motor drivers are controlled through three inverter triggering signals including pulse width modulation (PWM), Quasi-Six Step, and Six-Step for different ship navigation scenarios. Simulation results of application of the proposed model to a practical ship with electric propulsion system are presented. Test results have demonstrated that with the proposed model the harmonic distortions produced by electric propulsion systems under different speed situations can be effectively mitigated and consequently the system supply quality is maintained.
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Babenko, Vladimir Vladimirovich, Ilya Aleksandrovich Haichenko, and Yurij Vasilyevich Nefedov. "FEATURES OF REACTIVE POWER COMPENSATION IN ELECTRIC POWER NETWORKS AND SYSTEMS." National Association of Scientists 1, no. 30(57) (August 10, 2020): 48–52. http://dx.doi.org/10.31618/nas.2413-5291.2020.1.57.264.

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The article considers the conceptual issues of the specifics of optimizing the modes of electric power systems by compensating for reactive power, taking into account the voltage level. Taking into account the level of electric power quality, load change modes, specific cost of the control means and functional tasks, it is determined the algorithmic requirements for the optimization process: according to the criterion of the minimum loss of electric power in the networks and the minimum damage of specific consumers (consumer groups), respectively. The most efficient hardware based on static devices of the FACTS process platform is proposed.
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Sigitov, O. Yu, N. Sh Chemborisova, and I. D. Chernenkov. "Formalized reliability analysis during the electric power systems modes management." E3S Web of Conferences 216 (2020): 01008. http://dx.doi.org/10.1051/e3sconf/202021601008.

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The current problem of the selection of the electric power system control nodes, which can be used to solve multicriterial problems of the consumers reliable supply with the electric power of the necessary quality of maximum efficiency is investigated. At the same time, a new method of making decisions while choosing electric power system control nodes is proposed. It is necessary to take into account a set of different types of indicators which characterize different properties of these nodes.
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Bezbozhnov, Oleg, and Denis Chadaev. "Smart Grid: Monitoring the Quality of Electric Power." NBI Technologies, no. 2 (April 2022): 5–10. http://dx.doi.org/10.15688/nbit.jvolsu.2022.2.1.

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The issues of monitoring the normalized parameters of electricity, in smart grid networks, as a means of ensuring control of the quality of electricity, are considered. In the context of constantly growing consumption of electrical energy, the most important task is its rational distribution and use. State-of-the-art prototypes of intelligent power distribution networks include means of controlling power distribution and consumption processes to ensure that these processes comply with applicable regulations. The purpose of our study is to create a monitoring device for normalized power quality parameters, such as voltage, signal shape, harmonic coefficient, with the possibility of detecting deviations of these parameters from the norm, with the possibility of transmitting the results obtained via infocommunication networks. The developed device allows collecting, analyzing and transmitting data on power quality indicators in the distribution electrical network, with their further use in order to manage energy supply and energy consumption in smart power supply systems, and improve the energy efficiency of power supply systems through the introduction of smart grid technologies. The device can be integrated into energy systems based on the smart grid concept, which are a single energy-information complex, as part of a situation assessment system and emergency automation.
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Tsetskhladze, Merab, and Nata Dzagania. "Optimization of the Control System for the Movement of Electrodes in Electric Furnaces." Works of Georgian Technical University, no. 2(524) (June 6, 2022): 140–45. http://dx.doi.org/10.36073/1512-0996-2022-2-140-145.

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It’s known that the efficient operation of electrical appliances used in production significantly improves the quality and quantity of products. Competent control of technological processes is especially important for such a heavy industry as metallurgical production, where one of the most important issues is the optimal control system for electric motors of moving electrodes, which in turn ensures the required dynamics of arc power control and high productivity. The existing arc power control systems do not fully meet the basic requirements, such as insufficient sensitivity of the regulating parameter, speed and reliability of the electrode movement motor control system. The study of electric motor control systems is an important scientific and technical task in this regard. The optimization of the electric motor control system for moving the electrodes of an electric arc furnace based on the use of logic in control is discussed.
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Dissertations / Theses on the topic "Electric power systems – Quality control"

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Tai, Sio Un. "Power quality study in Macau and virtual power analyzer." Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2586277.

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Newman, Michael John 1976. "Design and control of a Universal Custom Power Conditioner (UCPC)." Monash University, Dept. of Electrical and Computer Systems Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/5651.

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Nduku, Nyaniso Prudent. "Development of methods for distribution network power quality variation monitoring." Thesis, Cape Peninsula University of Technology, 2009. http://hdl.handle.net/20.500.11838/1144.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2009
The purpose of this project is to develop methods for distribution network power quality' variations monitoring. Power quality (PO) has become a significant issue for both power suppliers and customers. There have been important changes in power system regarding to power quality requirements. "Power quality" is the combination at voltage quality and current quality. The main research problem of the project is to investigate the power quality of a distribution network by selection of proper measurement, applying and developing the existing classic and modern signal conditioning methods for power disturbance's parameters extracting and monitoring. The research objectives are: To study the standard lEC 61000-4-30 requirements. to investigate the common couplings in the distribution network. To identity the points for measurement, to develop MySQL database for the data from the measurement and to develop MATLAB software tor simulation of the network To develop methods based on Fourier transforms for estimation of the parameters of the disturbances. To develop software for the methods implementation, The influence of different loads on power quality disturbances are considered in the distribution network. Points on the network and meters according to the lEC power quality standards are investigated and applied for the CPUT Bellville campus distribution network. The implementation of the power quality monitoring for the CPUT Bellville campus helps the quality of power supply to be improved and the used power to be reduced. MATLAB programs to communicate with the database and calculate the disturbances and power quality parameters are developed.
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Manmek, Thip Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Real-time power system disturbance identification and its mitigation using an enhanced least squares algorithm." Awarded by:University of New South Wales. Electrical Engineering and Telecommunications, 2006. http://handle.unsw.edu.au/1959.4/26233.

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This thesis proposes, analyses and implements a fast and accurate real-time power system disturbances identification method based on an enhanced linear least squares algorithm for mitigation and monitoring of various power quality problems such as current harmonics, grid unbalances and voltage dips. The enhanced algorithm imposes less real-time computational burden on processing the system and is thus called ???efficient least squares algorithm???. The proposed efficient least squares algorithm does not require matrix inversion operation and contains only real numbers. The number of required real-time matrix multiplications is also reduced in the proposed method by pre-performing some of the matrix multiplications to form a constant matrix. The proposed efficient least squares algorithm extracts instantaneous sine and cosine terms of the fundamental and harmonic components by simply multiplying a set of sampled input data by the pre-calculated constant matrix. A power signal processing system based on the proposed efficient least squares algorithm is presented in this thesis. This power signal processing system derives various power system quantities that are used for real-time monitoring and disturbance mitigation. These power system quantities include constituent components, symmetrical components and various power measurements. The properties of the proposed power signal processing system was studied using modelling and practical implementation in a digital signal processor. These studies demonstrated that the proposed method is capable of extracting time varying power system quantities quickly and accurately. The dynamic response time of the proposed method was less than half that of a fundamental cycle. Moreover, the proposed method showed less sensitivity to noise pollution and small variations in fundamental frequency. The performance of the proposed power signal processing system was compared to that of the popular DFT/FFT methods using computer simulations. The simulation results confirmed the superior performance of the proposed method under both transient and steady-state conditions. In order to investigate the practicability of the method, the proposed power signal processing system was applied to two real-life disturbance mitigation applications namely, an active power filter (APF) and a distribution synchronous static compensator (D-STATCOM). The validity and performance of the proposed signal processing system in both disturbance mitigations applications were investigated by simulation and experimental studies. The extensive modelling and experimental studies confirmed that the proposed signal processing system can be used for practical real-time applications which require fast disturbance identification such as mitigation control and power quality monitoring of power systems
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Fleshman, Muller Eunamia. "Development of a supplier quality assessment system in Eskom." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97323.

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Thesis (MBA)--Stellenbosch University, 2015.
ENGLISH ABSTRACT: Eskom, the South Africa and trans-Africa electrical power utility, has a capacity expansion project that is estimated to cost roughly R340 billion. The programme is anticipated to continue through 2018. Eskom will be contracting with a multitude of suppliers and it is imperative that the projects delivered under the capacity expansion programme meet Eskom’s required quality standards. The question then arises whether the set quality standards are sufficiently comprehensive to provide confidence that suppliers will achieve high quality standards. This aim of this research was to examine supplier assessment programmes to determine the criteria that will best provide supplier assurance. The researcher consulted a vast range of literature available on supplier quality assessment programmes. From the literature consulted, there appeared to be some recurring themes from the range of assessment tools. It also becomes apparent that the assessment tool cannot only focus on a quality system, but a balance of strategic and operational focus was needed to fully understand suppliers’ ability to deliver. One of the key considerations was establishing longer-term collaborative relationships with key suppliers. Long-term relations encourage trust, transparency and innovation. It was equally important to ensure that operational assessments provided insight on suppliers’ capability. Based on the literature reviewed, a proposed framework was tested against the current methodology for supplier evaluation. From these comparisons, some gaps were identified and recommendations were suggested to improve the supplier evaluation programme.
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Lam, Chi Seng. "An adaptive low dc-voltage controlled LC coupling hybrid active power filter in three-phase four-wire power systems." Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2580608.

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Grobler, Frederik Antonie. "The development of harmonic content and quality of electricity supply measuring system incorporating scada processing." Thesis, Bloemfontein : Central University of Technology, Free State, 2005. http://hdl.handle.net/11462/61.

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Thesis (D.Tech (Engineering Electrical)) - Central University of Technology, Free State, 2005
When Thomas Edison invented his carbon filament lamp in 1879, gas shares fell overnight. A committee of inquiry was set up to examine the future possibilities of the new method of lighting, and had reached the conclusion that electric light in the home was fanciful and absurd. Today electric light burns in practically every house in the civilised world, with many great advances in the production and use of electricity and electric power supplied by various utilities. The objective of the electric utility to deliver pure sinusoidal voltage at fairly constant magnitude throughout their system is complicated by the fact that there are currently loads on the system that produce harmonic voltages, which result in distorted voltages and currents that can adversely impact on the system performance in different ways. Because the numbers of harmonic producing loads have increased over the years, it has become necessary to address their influence, when making any additions or changes to an installation. Quality of supply measurements have long been used to characterise non-linearity on the power system, and have traditionally been measured with expensive portable analysers. A potentially faster, more integrated, and more flexible solution to measure the harmonics with a Supervisory System is accomplished by this research. Any script which aspired to cover in full detail the whole field of a subject so enormous as techniques to measure the quality of electricity supply on a SCADA system, would hardly be practical in less than a few volumes. The pretensions of this research are both modest and of a more immediate value to the reader.
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Looja, Tuladhar R. "Control of Custom Power System using Active Disturbance Rejection Control." Cleveland State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=csu1438913443.

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Zhang, Li. "Study of FACTS/ESS Applications in Bulk Power System." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28465.

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The electric power supply industry has evolved into one of the largest industries. Even though secure and reliable operation of the electric power system is fundamental to economy, social security and quality of modern life, the complicated power grid is now facing severe challenges to meet the high-level secure and reliable operation requirements. New technologies will play a major role in helping today's electric power industry to meet the above challenges. This dissertation has focused on some key technologies among them, including the emerging technologies of energy storage, controlled power electronics and wide area measurement technologies. Those technologies offer an opportunity to develop the appropriate objectives for power system control. The use of power electronics based devices with energy storage system integrated into them, such as FACTS/ESS, can provide valuable added benefits to improve stability, power quality, and reliability of power systems. The study in this dissertation has provided several guidelines for the implementation of FACTS/ESS in bulk power systems. The interest of this study lies in a wide range of FACTS/ESS technology applications in bulk power system to solve some special problems that were not solved well without the application of FACTS/ESS. The special problems we select to solve by using FACTS/ESS technology in this study include power quality problem solution by active power compensation, electrical arc furnace (EAF) induced problems solution, inter-area mode low frequency oscillation suppression, coordination of under frequency load shedding (UFLS) and under frequency governor control (UFGC), wide area voltage control. From this study, the author of this dissertation reveals the unique role that FACTS/ESS technology can play in the bulk power system stability control and power quality enhancement in power system. In this dissertation, almost all the studies are based on the real system problems, which means that the study results are special valuable to certain utilities that have those problems. The study in this dissertation can assist power industry choose the right FACTS/ESS technology for their intended functions, which will improve the survivability, minimize blackouts, and reduce interruption costs through the use of energy storage systems.
Ph. D.
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Silva, Newton da. "Contribuições ao estudo, projeto e aplicação de filtros ativos híbridos de potência." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260365.

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Orientadores: José Antenor Pomilio, Edson Adriano Vendrusculo
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-20T02:26:04Z (GMT). No. of bitstreams: 1 Silva_Newtonda_D.pdf: 5963220 bytes, checksum: 500403f704e8c3419c8550979ec0b925 (MD5) Previous issue date: 2012
Resumo: Os filtros híbridos combinam o filtro passivo com o filtro ativo para a obtenção de um filtro que aproveita as qualidades de ambos. O filtro híbrido possui uma redução de potência na sua parte ativa e apresenta um melhor desempenho que o filtro passivo. Existem diferentes topologias de combinações entre o filtro passivo e o filtro ativo, cada uma com suas características. A topologia mais usual é aquela em que o filtro ativo fica em série com o filtro passivo. Neste trabalho será analisada a topologia com o filtro ativo em paralelo com o indutor do filtro passivo. A vantagem desta topologia é a divisão das correntes harmônicas entre ambos os filtros, o que não ocorre na topologia série. O funcionamento do filtro híbrido na compensação das harmônicas de corrente da carga é aprofundado, ampliando as discussões anteriormente publicadas, identificando novas características de operação, contribuindo no estabelecimento de procedimentos de projeto tanto do circuito de potência quanto de controle. Um estudo teórico da atuação do filtro híbrido em um alimentador industrial de média tensão descrito na norma IEEE 519-1992 (workbench) é também apresentado. Resultados experimentais de implementação em um protótipo são apresentados de modo a comprovar a técnica de controle usada e também avaliar a compensação de correntes harmônicas em situações distintas de carga e harmônico de tensão na rede
Abstract: Hybrid Filters combine the passive filter with the active filter to obtain a filter that takes advantage of the qualities of both. The hybrid filter has a power reduction in its active part and presents better performance than the passive filter. There are different topologies of the combinations between the passive filter and the active filter, each with its own characteristics. The most common topology is the active filter in series with the passive filter. In this work the topology that will be analyzed is one where the active filter is parallel to the inductor of the passive filter. The advantage of this topology is the division of the harmonic current between the two filters, this does not occur in the series topology. The operation of the hybrid filter in the compensation of the load harmonic current is improved, expanding the discussions previously published, identifying new characteristics of operation, contributing to the establishment of design procedures in the power circuit as in the control. A theoretical study of the hybrid filter performance in an industrial medium voltage power supply described in IEEE standard 519-1992 (workbench) is presented too. Experimental results from a prototype implementation are presented in order to check the control technique used and also to evaluate the current harmonic compensation in different situations of the load and harmonic voltage in the source
Doutorado
Energia Eletrica
Doutor em Engenharia Elétrica
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Books on the topic "Electric power systems – Quality control"

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Sankaran, C. Power quality. Boca Raton, FL: CRC Press, 2002.

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Power quality. Boca Raton: CRC Press, 2002.

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F, McGranaghan Mark, and Beaty H. Wayne, eds. Electrical power systems quality. Estados Unidos: McGraw-Hill Interamericana, 1996.

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F, McGranaghan M., and Beaty H. Wayne, eds. Electrical power systems quality. New York: McGraw Hill, 1996.

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H, Sendaula Musoke, ed. Electric power quality control techniques. New York: Van Nostrand Reinhold, 1993.

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Chattopadhyay, Surajit. Electric Power Quality. Dordrecht: Springer Science+Business Media B.V., 2011.

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Arrillaga, J. Power system quality assessment. Chichester: John Wiley & Sons, 2000.

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Vedam, R. Sastry. Power quality: VAR compensation in power systems. Boca Raton, FL: Chapman & Hall/CRC Press, 2008.

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Fundamentals of electric power quality. 2nd ed. Austin, Tex: Published by Surya Santoso through CreateSpace, 2009.

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Fuchs, Ewald F. Power quality in power systems and electrical machines. Boston: Academic Press/Elsevier, 2008.

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Book chapters on the topic "Electric power systems – Quality control"

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Samal, Sarita, Tarakanta Jena, and Prasanta Kumar Barik. "Power Quality Improvement of a Fuel Cell-Based Distributed Generation System Using Unified Power Quality Conditioner." In Advances in Electrical Control and Signal Systems, 227–38. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5262-5_15.

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Samal, Laxmipriya, Hemanta Kumar Palo, Badri Narayan Sahu, and Debashisa Samal. "Characterization of Power Quality Disturbances and Their Efficient Classification." In Advances in Electrical Control and Signal Systems, 969–81. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5262-5_75.

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Mishra, Alok Kumar, Prakash Kumar Ray, Akshaya Kumar Patra, Ranjan Kumar Mallick, and Soumya Ranjan Das. "Self-tuned PI Controller Based Hybrid Shunt Active Power Filter for Power Quality Enhancement." In Advances in Electrical Control and Signal Systems, 315–27. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5262-5_22.

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Awaar, Vinay Kumar, Praveen Jugge, S. Tara Kalyani, and Mohsen Eskandari. "Dynamic Voltage Restorer–A Custom Power Device for Power Quality Improvement in Electrical Distribution Systems." In Studies in Infrastructure and Control, 97–116. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7956-9_4.

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Wojciechowski, Jerzy, Łukasz Stelmach, Marek Wójtowicz, and Jakub Młyńczak. "Quality of Electrical Energy Power Supply of Railway Traffic Control Devices." In Lecture Notes in Networks and Systems, 77–86. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-98615-9_7.

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Salim, Chennai. "Power Quality Enhancement with UPQC Systems Based on Multi-level (NPC) Inverters." In Advanced Control Engineering Methods in Electrical Engineering Systems, 45–59. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97816-1_4.

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Sanjay, S. M., M. Saritha, and M. H. Sidram. "Mitigation of Power Quality Issues Using DSTATCOM Through the Theory of Direct-Detection Light Wave Receivers Using Optical Amplifiers." In Advances in Electrical Control and Signal Systems, 691–703. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5262-5_52.

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Hadizade, Amirabbas. "An Agent-Based Model for Optimal Voltage Control and Power Quality by Electrical Vehicles in Smart Grids." In Advances in Intelligent Systems and Computing, 388–94. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-99608-0_52.

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Chattopadhyay, Surajit, Madhuchhanda Mitra, and Samarjit Sengupta. "Electric Power Quality." In Power Systems, 5–12. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0635-4_2.

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Ammar, Abdelkarim. "Power Quality Improvement of PWM Rectifier-Inverter System Using Model Predictive Control for an AC Electric Drive Application." In Lecture Notes in Electrical Engineering, 427–39. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6403-1_29.

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Conference papers on the topic "Electric power systems – Quality control"

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Tukhas, V. A. "About electric power quality monitoring systems for quality control of electrical power in power industry." In 7th International Symposium on Electromagnetic Compatibility and Electromagnetic Ecology. IEEE, 2007. http://dx.doi.org/10.1109/emceco.2007.4371634.

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Trainer, D. R. "Electric actuation - power quality management of aerospace flight control systems." In International Conference on Power Electronics Machines and Drives. IEE, 2002. http://dx.doi.org/10.1049/cp:20020119.

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Kumar, A. Vamshi, K. Ajith, P. Nagarjuna Reddy, G. Rajender Naik, and N. Rakesh. "Improved power quality control strategy for distributed generation systems." In 2014 International Conference on Smart Electric Grid (ISEG). IEEE, 2014. http://dx.doi.org/10.1109/iseg.2014.7005582.

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Japarova, Dinara, Vyacheslav Kalinin, Sergey Kochergin, Alexander Kobelev, and Lyudmila Korolyova. "Quality Management of Electric Power for Agricultural Consumers." In 2019 1st International Conference on Control Systems, Mathematical Modelling, Automation and Energy Efficiency (SUMMA). IEEE, 2019. http://dx.doi.org/10.1109/summa48161.2019.8947502.

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Sun, Jian. "AC power electronic systems: Stability and power quality." In 2008 11th Workshop on Control and Modeling for Power Electronics (COMPEL). IEEE, 2008. http://dx.doi.org/10.1109/compel.2008.4634697.

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Wu, D. M., C. K. P. Luk, and W. Z. Fei. "Quality control of low-cost electric machines for electric vehicles by DOE assisted six sigma DMADV method." In 2017 7th International Conference on Power Electronics Systems and Applications - Smart Mobility, Power Transfer & Security (PESA). IEEE, 2017. http://dx.doi.org/10.1109/pesa.2017.8277740.

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Vanfretti, Luigi, Naveed Ahmad Khan, Wei Li, Md Rokibul Hasan, and Arif Haider. "Generic VSC and low level switching control models for offline simulation of VSC-HVDC systems." In 2014 Electric Power Quality and Supply Reliability Conference (PQ). IEEE, 2014. http://dx.doi.org/10.1109/pq.2014.6866825.

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Moravek, Jan, Jiri Drapela, Vojtech Wasserbauer, and Petr Mastny. "Power quality issues related to power flow control in systems with renewable energy micro sources." In 2016 17th International Scientific Conference on Electric Power Engineering (EPE). IEEE, 2016. http://dx.doi.org/10.1109/epe.2016.7521784.

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Suslov, Konstantin, Nafisa Solonina, and Vladimir Stepanov. "A principle of power quality control in the intelligent distribution networks." In 2015 International Symposium on Smart Electric Distribution Systems and Technologies (EDST). IEEE, 2015. http://dx.doi.org/10.1109/sedst.2015.7315218.

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Shoureshi, Rahmat, Hanchu Li, Robert Kramer, and Henry Klaiman. "Intelligent Control for Electrical Power Generation Systems." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0403.

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Abstract Deregulation of electric power, introduction of independent power producers and increase competition have introduce new challengers to the utility industry. The ability to project short term demands and be able to respond to highly varying loads with high power quality are essential elements of a reliable and secure power system. This paper presents a new approach to the automatic generation control that combines advanced in neural networks, control theory, and electric power systems.
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Reports on the topic "Electric power systems – Quality control"

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Lesieutre, Bernard C., and Daniel K. Molzahn. Optimization and Control of Electric Power Systems. Office of Scientific and Technical Information (OSTI), October 2014. http://dx.doi.org/10.2172/1159823.

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Kirkham, H. Communications and control for electric power systems: Final report. Office of Scientific and Technical Information (OSTI), April 1998. http://dx.doi.org/10.2172/629481.

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Bajura, Richard, and Ali Feliachi. Integrated Computing, Communication, and Distributed Control of Deregulated Electric Power Systems. Office of Scientific and Technical Information (OSTI), September 2008. http://dx.doi.org/10.2172/938476.

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Phadke, A., S. Horowitz, and J. Thorp. Integrated hierarchical computer systems for adaptive protective relaying and control of electric transmission power systems. Office of Scientific and Technical Information (OSTI), November 1989. http://dx.doi.org/10.2172/5382017.

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Chiang, Hsiao-Dong, Ray D. Zimmerman, and Robert J. Thomas. TAS: 89 0227: TAS Recovery Act - Optimization and Control of Electric Power Systems: ARRA. Office of Scientific and Technical Information (OSTI), February 2014. http://dx.doi.org/10.2172/1126436.

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de Boer, Jan, Nikodem Derengowski, Marc Fontoynont, Daniel Neves Pimenta, Per Reinhold, and Robert Weitlaner. Standardisation issues related to lighting and daylighting control systems. Edited by Marc Fontoynont. IEA SHC Task 61, October 2021. http://dx.doi.org/10.18777/ieashc-task61-2021-0011.

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Even though there are existing codes and standards regarding daylighting and electric lighting controls, they have to be constantly reviewed and updated, as the technology is growing rapidly - and so do the users’ expectations. That is, in both efficiency of buildings in terms of sustainability and energy usage (utilizing advanced sensor-based systems), and also in the need for high quality of lighting at the workplaces.
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Hawthorne, S. B., R. C. Timpe, and J. H. Hartman. Resource characterization and residuals remediation, Task 1.0: Air quality assessment and control, Task 2.0: Advanced power systems, Task 3.0: Advanced fuel forms and coproducts, Task 4.0. Office of Scientific and Technical Information (OSTI), February 1994. http://dx.doi.org/10.2172/10149623.

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Shomer, Ilan, Ruth E. Stark, Victor Gaba, and James D. Batteas. Understanding the hardening syndrome of potato (Solanum tuberosum L.) tuber tissue to eliminate textural defects in fresh and fresh-peeled/cut products. United States Department of Agriculture, November 2002. http://dx.doi.org/10.32747/2002.7587238.bard.

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The project sought to understand factors and mechanisms involved in the hardening of potato tubers. This syndrome inhibits heat softening due to intercellular adhesion (ICA) strengthening, compromising the marketing of industrially processed potatoes, particularly fresh peeled-cut or frozen tubers. However, ICA strengthening occurs under conditions which are inconsistent with the current ideas that relate it to Ca-pectate following pectin methyl esterase (PME) activity or to formation of rhamnogalacturonan (RG)-II-borate. First, it was necessary to induce strengthening of the middle lamellar complex (MLX) and the ICA as a stress response in some plant parenchyma. As normally this syndrome does not occur uniformly enough to study it, we devised an efficient model in which ICA-strengthening is induced consistently under simulated stress by short-chain, linear, mono-carboxylic acid molecules (OAM), at 65 oC [appendix 1 (Shomer&Kaaber, 2006)]. This rapid strengthening was insufficient for allowing the involved agents assembly to be identifiable; but it enabled us to develop an efficient in vitro system on potato tuber parenchyma slices at 25 ºC for 7 days, whereas unified stress was reliably simulated by OAMs in all the tissue cells. Such consistent ICA-strengthening in vitro was found to be induced according to the unique physicochemical features of each OAM as related to its lipophilicity (Ko/w), pKa, protonated proportion, and carbon chain length by the following parameters: OAM dissociation constant (Kdiss), adsorption affinity constant (KA), number of adsorbed OAMs required for ICA response (cooperativity factor) and the water-induced ICA (ICAwater). Notably, ICA-strengthening is accompanied by cell sap leakage, reflecting cell membrane rupture. In vitro, stress simulation by OAMs at pH<pKa facilitated the consistent assembly of ICAstrengthening agents, which we were able to characterize for the first time at the molecular level within purified insoluble cell wall of ICA-strengthened tissue. (a) With solid-state NMR, we established the chemical structure and covalent binding to cell walls of suberin-like agents associated exclusively with ICA strengthening [appendix 3 (Yu et al., 2006)]; (b) Using proteomics, 8 isoforms of cell wall-bound patatin (a soluble vacuolar 42-kDa protein) were identified exclusively in ICA-strengthened tissue; (c) With light/electron microscopy, ultrastructural characterization, histochemistry and immunolabeling, we co-localized patatin and pectin in the primary cell wall and prominently in the MLX; (d) determination of cell wall composition (pectin, neutral sugars, Ca-pectate) yielded similar results in both controls and ICA-strengthened tissue, implicating factors other than PME activity, Ca2+ or borate ions; (e) X-ray powder diffraction experiments revealed that the cellulose crystallinity in the cell wall is masked by pectin and neutral sugars (mainly galactan), whereas heat or enzymatic pectin degradation exposed the crystalline cellulose structure. Thus, we found that exclusively in ICA-strengthened tissue, heat-resistant pectin is evident in the presence of patatin and suberinlike agents, where the cellulose crystallinity was more hidden than in fresh control tissue. Conclusions: Stress response ICA-strengthening is simulated consistently by OAMs at pH< pKa, although PME and formation of Ca-pectate and RG-II-borate are inhibited. By contrast, at pH>pKa and particularly at pH 7, ICA-strengthening is mostly inhibited, although PME activity and formation of Ca-pectate or RG-II-borate are known to be facilitated. We found that upon stress, vacuolar patatin is released with cell sap leakage, allowing the patatin to associate with the pectin in both the primary cell wall and the MLX. The stress response also includes formation of covalently bound suberin-like polyesters within the insoluble cell wall. The experiments validated the hypotheses, thus led to a novel picture of the structural and molecular alterations responsible for the textural behavior of potato tuber. These findings represent a breakthrough towards understanding of the hardening syndrome, laying the groundwork for potato-handling strategies that assure textural quality of industrially processed particularly in fresh peeled cut tubers, ready-to-prepare and frozen preserved products.
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Little, Charles, and David Biedenharn. Technical assessment of the Old, Mississippi, Atchafalaya, and Red (OMAR) Rivers : channel geometry analysis. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/45147.

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The Old River Control Complex (ORCC) consists of the Low Sill, Auxiliary, and Overbank structures as features of the Old River Control Structure (ORCS) and the privately owned hydro-electric power plant. Operations of the ORCC manage the hydrologic connectivity between the Mississippi River and the Atchafalaya River/Red River systems. The morphology of the Old, the Mississippi, the Atchafalaya, and the Red Rivers (OMAR) has been influenced by the flow distribution at the ORCC, as well as the accompanying bed sediments. A geomorphic assessment of the OMAR is underway to understand the morphological changes associated with operation of the ORCC. Supporting the geomorphic assessment, a channel geometry analysis herein documents observed adjustments of the affected river channels. Historical hydrographic survey data were used in the Geographic Information System to create river channel geometric models, which inform the analysis. Geometric parameters for cross sections and volume polygons were computed for each survey and evaluated for morphological trends which may be ascribed to the influence of the ORCC. Additionally, the geometric parameters for the Atchafalaya River were used to extend the geometry analyses from the 1951 Mississippi River Commission report on the Atchafalaya River, which was the primary catalyst for the initial development of the ORCS.
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Minz, Dror, Stefan J. Green, Noa Sela, Yitzhak Hadar, Janet Jansson, and Steven Lindow. Soil and rhizosphere microbiome response to treated waste water irrigation. United States Department of Agriculture, January 2013. http://dx.doi.org/10.32747/2013.7598153.bard.

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Research objectives : Identify genetic potential and community structure of soil and rhizosphere microbial community structure as affected by treated wastewater (TWW) irrigation. This objective was achieved through the examination soil and rhizosphere microbial communities of plants irrigated with fresh water (FW) and TWW. Genomic DNA extracted from soil and rhizosphere samples (Minz laboratory) was processed for DNA-based shotgun metagenome sequencing (Green laboratory). High-throughput bioinformatics was performed to compare both taxonomic and functional gene (and pathway) differences between sample types (treatment and location). Identify metabolic pathways induced or repressed by TWW irrigation. To accomplish this objective, shotgun metatranscriptome (RNA-based) sequencing was performed. Expressed genes and pathways were compared to identify significantly differentially expressed features between rhizosphere communities of plants irrigated with FW and TWW. Identify microbial gene functions and pathways affected by TWW irrigation*. To accomplish this objective, we will perform a metaproteome comparison between rhizosphere communities of plants irrigated with FW and TWW and selected soil microbial activities. Integration and evaluation of microbial community function in relation to its structure and genetic potential, and to infer the in situ physiology and function of microbial communities in soil and rhizospere under FW and TWW irrigation regimes. This objective is ongoing due to the need for extensive bioinformatics analysis. As a result of the capabilities of the new PI, we have also been characterizing the transcriptome of the plant roots as affected by the TWW irrigation and comparing the function of the plants to that of the microbiome. *This original objective was not achieved in the course of this study due to technical issues, especially the need to replace the American PIs during the project. However, the fact we were able to analyze more than one plant system as a result of the abilities of the new American PI strengthened the power of the conclusions derived from studies for the 1ˢᵗ and 2ⁿᵈ objectives. Background: As the world population grows, more urban waste is discharged to the environment, and fresh water sources are being polluted. Developing and industrial countries are increasing the use of wastewater and treated wastewater (TWW) for agriculture practice, thus turning the waste product into a valuable resource. Wastewater supplies a year- round reliable source of nutrient-rich water. Despite continuing enhancements in TWW quality, TWW irrigation can still result in unexplained and undesirable effects on crops. In part, these undesirable effects may be attributed to, among other factors, to the effects of TWW on the plant microbiome. Previous studies, including our own, have presented the TWW effect on soil microbial activity and community composition. To the best of our knowledge, however, no comprehensive study yet has been conducted on the microbial population associated BARD Report - Project 4662 Page 2 of 16 BARD Report - Project 4662 Page 3 of 16 with plant roots irrigated with TWW – a critical information gap. In this work, we characterize the effect of TWW irrigation on root-associated microbial community structure and function by using the most innovative tools available in analyzing bacterial community- a combination of microbial marker gene amplicon sequencing, microbial shotunmetagenomics (DNA-based total community and gene content characterization), microbial metatranscriptomics (RNA-based total community and gene content characterization), and plant host transcriptome response. At the core of this research, a mesocosm experiment was conducted to study and characterize the effect of TWW irrigation on tomato and lettuce plants. A focus of this study was on the plant roots, their associated microbial communities, and on the functional activities of plant root-associated microbial communities. We have found that TWW irrigation changes both the soil and root microbial community composition, and that the shift in the plant root microbiome associated with different irrigation was as significant as the changes caused by the plant host or soil type. The change in microbial community structure was accompanied by changes in the microbial community-wide functional potential (i.e., gene content of the entire microbial community, as determined through shotgun metagenome sequencing). The relative abundance of many genes was significantly different in TWW irrigated root microbiome relative to FW-irrigated root microbial communities. For example, the relative abundance of genes encoding for transporters increased in TWW-irrigated roots increased relative to FW-irrigated roots. Similarly, the relative abundance of genes linked to potassium efflux, respiratory systems and nitrogen metabolism were elevated in TWW irrigated roots when compared to FW-irrigated roots. The increased relative abundance of denitrifying genes in TWW systems relative FW systems, suggests that TWW-irrigated roots are more anaerobic compare to FW irrigated root. These gene functional data are consistent with geochemical measurements made from these systems. Specifically, the TWW irrigated soils had higher pH, total organic compound (TOC), sodium, potassium and electric conductivity values in comparison to FW soils. Thus, the root microbiome genetic functional potential can be correlated with pH, TOC and EC values and these factors must take part in the shaping the root microbiome. The expressed functions, as found by the metatranscriptome analysis, revealed many genes that increase in TWW-irrigated plant root microbial population relative to those in the FW-irrigated plants. The most substantial (and significant) were sodium-proton antiporters and Na(+)-translocatingNADH-quinoneoxidoreductase (NQR). The latter protein uses the cell respiratory machinery to harness redox force and convert the energy for efflux of sodium. As the roots and their microbiomes are exposed to the same environmental conditions, it was previously hypothesized that understanding the soil and rhizospheremicrobiome response will shed light on natural processes in these niches. This study demonstrate how newly available tools can better define complex processes and their downstream consequences, such as irrigation with water from different qualities, and to identify primary cues sensed by the plant host irrigated with TWW. From an agricultural perspective, many common practices are complicated processes with many ‘moving parts’, and are hard to characterize and predict. Multiple edaphic and microbial factors are involved, and these can react to many environmental cues. These complex systems are in turn affected by plant growth and exudation, and associated features such as irrigation, fertilization and use of pesticides. However, the combination of shotgun metagenomics, microbial shotgun metatranscriptomics, plant transcriptomics, and physical measurement of soil characteristics provides a mechanism for integrating data from highly complex agricultural systems to eventually provide for plant physiological response prediction and monitoring. BARD Report
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