Thematische Bibliographien / Electrical power unit

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Auswahl der wissenschaftlichen Literatur zum Thema „Electrical power unit“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 14. Februar 2022

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Zeitschriftenartikel zum Thema "Electrical power unit"

Hnatov, Andrii, Shchasiana Arhun, Ruslan Bagach, Andrii Nechaus, Valentina Tarasova, Oleksandr Ruchka, Alla Don und Antons Patlins. „ELECTRICAL POWER UNIT OF THE TRANSFORMER OIL CENTRIFUGAL CLEANING UNIT“. Automobile transport, Nr. 48 (29.05.2021): 101–12. http://dx.doi.org/10.30977/at.2219-8342.2021.48.0.101.

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Problem. Cleaning transformer oil is one of the important engineering tasks, whose solution is associated with significant material and energy expenditure. Due to the increase in electricity consumption at modern automobile companies (firms, organizations, service stations, etc.), the load on transformer substations increases and the requirements for reliability of electrical and electronic devices become more complicated. This, in turn, leads to the problem of cleaning and recycling of transformer oil. Goal. The goal is the research and development of an efficient unit for centrifugal cleaning of transformer oil with a drive control system that provides automation of the start and braking mode of the drive. Methodology. Analytical methods of research, methods of the theory of electric machines and electric drives are used, as well as the methods of calculating electric circuits. Also, methods of analysis of circuits and control of power electronics devices, principles of operation and methods of control of static converters are used. Results. The structural scheme of the unit for cleaning transformer oil is developed. The calculations of the main elements of the power block of the transformer oil cleaning unit are performed. The block diagram of the voltage converter with frequency f = 50 Hz to alternating voltage with frequency f = 400 Hz is developed. Control circuits of the electric drive of the centrifugal separator are chosen. The analysis of operation of electric drive control circuits is carried out and the principles of their work concerning two components are considered: the regulated rectifier and the inverter. Originality. The scheme of the converter of alternating three-phase current with voltage of 220 V and frequency of 50 Hz, into alternating three-phase current with voltage of 220 V and frequency of 400 Hz is developed. This frequency, in addition to providing the necessary characteristics of the oil separator, allows you to develop a converter device of a relatively small weight and volume, and also provides its high reliability. Practical value. Utilizing the used transformer oil in this way will solve several problems at once. It is possible to reduce the initial production of transformer oil. The issue of waste oil disposal is being resolved leading to the solution of the environmental aspect of this problem. All this will reduce the cost of oil poured into transformers and the operating cost of transformer substations.

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Khitrov, Alexander, Andrei Khitrov, Sergey Loginov, Yuliya Domracheva und Evgeniy Veselkov. „POWER UNIT FOR POWER SUPPLY OF AN AUTONOMOUS FACILITY HAVING ABILITY TO CONNECT TO GENERAL INDUSTRIAL POWER SUPPLY IN RECUPERATIVE MICROGENERATION MODE“. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (16.06.2021): 142–47. http://dx.doi.org/10.17770/etr2021vol3.6517.

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Fundamental and exploratory research in the field of energetics and rational nature management is currently focused on getting results in the field of the effective development and functioning of energy systems. Such systems are based on modern electrical equipment, including electrical machines and controlled power converters (active rectifiers and regenerative units (AC/DC), direct voltage converters (DC/DC), inverters (DC/AC)), conventional and non-traditional electric power based on renewable energy sources (RES).The Program of basic research in the Russian Federation on a long-term period (2021-2030 years) comprises the actual problems of development of energy supply, energy efficiency, renewable and alternative sources in industry and agriculture, including the issues of production technology, of conversion and storage of electric power.Electric power from the renewable energy sources requires its continuous correction, equalization and buffering i.e. a control system for the system operating modes.The paper presents a project of the power unit that provides both autonomous and traditional operation of a power plant having the possibility of recuperating electrical energy into the network. The structure and the composition of such a power unit is proposed, basic control strategies for an autonomous power generating plant having a capacity of up to 15 kW, operating from the variable low speed engine, also having the other sources of alternative energy with the possibility of power accumulation are considered.

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Isakov, Andrei N., Andrei V. Andrusich und Igor E. Savraev. „Device for Reduction Sparking of Slip Ring of Turbo Generator“. Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (08.08.2015): 116. http://dx.doi.org/10.17770/etr2013vol2.851.

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Most modern power plants generating electric power equipped with synchronous generators. The correct operation of energy economy depends on reliability of such electrical machines. In this article issue of increasing reliability of turbo generator by increasing reliability of its brush contact unit is considered. Description of brush contact unit and its possible damages is given. Equivalent electrical circuit of contact layer of brush contact unit is performed. The equations are formed and the dynamical simulation model consisting of electric source and two brush contact units is created. With help of this model alternative method of improving parameters of brush contact unit and increasing reliability of turbo generator at once is calculated and shown. The implementation of the proposed method of increasing the turbo generator brush contact units reliability can have different technical performance, but the principle laid down in the method remains the same.

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Bizhaev, A. V. „Research of Tractor Power Unit with Electric Drive Parameters“. Agricultural Machinery and Technologies 14, Nr. 4 (18.12.2020): 33–42. http://dx.doi.org/10.22314/2073-7599-2020-14-4-33-42.

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The author showed that it was possible to reduce the exhaust gases toxicity and increase tractors effi ciency using an electric power unit to implement traction. The effi ciency of modern electric motors was at its peak of 96 percent, compared to 45 for a diesel engine. He emphasized that this parameter for modern sources of electrical energy was 85-90 percent, which opened up opportunities for the implementation of an electric tractor.(Research purpose) To present the general concept of an electric drive power unit for a tractor of a small traction class and to evaluate its parameters as a fi rst approximation.(Materials and methods) For the tractor’s electric drive lithium-ion batteries were chosen as a source of electrical energy, showing the best characteristics of energy intensity – 432-864 kilojoule per kilogram with a unit cost of 4200-17400 rubles per kilogram. During the analyses of the power unit drive types, a D-120 diesel engine with a power of 20 kilowatt, a DC electric motor and an asynchronous motor with similar parameters were studied. The VTZ-2032 tractor with a nominal tractive eff ort of 600 Newtons when working on stubble was taken as the basis for the calculation.(Results and discussion) The author determined the best indicators of the electric drive by the power characteristics fullness in the gears with a decrease in unit costs per kWh from 24 to 15-16 rubles.(Conclusions) The most effi cient engine was determined – a brushless DC electric motor. The author calculated that the specifi c cost of its energy was 1.5-1.8 times less than that of a diesel engine, and amounted to 15-27 rubles per kilowatt-hour with a maximum effi ciency of 95 percent. It was found that lithium-ion batteries would be the optimal solution for powering the electric drive. They were distinguished by a high specifi c energy consumption – 432-864 kilojoule per kilogram – and a low price per energy unit, amounting to 5-45 rubles per kilojoule.

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Sorokin, Ilya V., Dmitrii S. Semenov und Sergei V. Sharashkin. „CONCEPT STUDIES OF VESSEL ELECTRICAL POWER TRANSMISSION UNIT“. Vestnik Gosudarstvennogo universiteta morskogo i rechnogo flota imeni admirala S. O. Makarova 13, Nr. 2 (28.04.2021): 278–89. http://dx.doi.org/10.21821/2309-5180-2021-13-2-278-289.

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Shin, Kyoo-Jae, und Hyun-Rok Cha. „Design of Embedded Electrical Power Control Unit for Personal Electrical Vehicle“. Journal of IKEEE 18, Nr. 2 (30.06.2014): 282–90. http://dx.doi.org/10.7471/ikeee.2014.18.2.282.

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Pletin, Sergey Aleksandrovich, und Alexander Nikolaevich Petrenko. „INFORMATION-MEASURING SYSTEMS FOR ELECTRICAL PROPULSION UNIT“. Journal of Rocket-Space Technology 27, Nr. 4 (30.12.2019): 62–66. http://dx.doi.org/10.15421/451910.

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Considered electric propulsion systems (EPS) based on the Hall effect. Structure of EPS includes hall thruster (HT), xenon feed system (XFS), power processing unit and automatic control and monitoring system. The task is to design information-measuring system (IMS), which allows measurement of the current settings of EPS, conduct their mathematical processing and registration for further analysis. EPS is a complex physical system consisting of subsystems within which different physical processes. These processes are characterized by a large number of parameters and characteristics to be measured and controlled in the process EPS. Listed EPS parameters that should be measured in the operation of system. Determined informative signs of laboratory and onboard subsystems EPS. The necessity of development of information-measuring system and the need to create two different IMS - for use in laboratory equipment for research and testing of subsystems and EPS use in an onboard system management and control. Laboratory IMS provides measurement parameters and test conditions in a vacuum chamber; modes of power processing unit; XFS modes; EPS temperatures subsystem (anode, cathode, supply system, power conversion system); thrust of hall-effect thruster and forming control signals for power sources, flow of propellant and laboratory equipment. Onboard IMS provides measuring current and voltage discharge between the anode and the cathode; valve current of XFS; high and low level pressure of XFS; the temperature of the anode block, cathode, power processing unit.Formulated the tasks performed by the laboratory and on-board IMS. Made choice of hardware implementation of the IMS. The work on the creation of software for the operation of the IMS.

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Rashid, Mofeed. „Design and Implementation of Smart Electrical Power Meter System“. Iraqi Journal for Electrical and Electronic Engineering 10, Nr. 1 (01.06.2014): 1–14. http://dx.doi.org/10.37917/ijeee.10.1.1.

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In recent years, increased importance of Smart Grid, which includes monitoring and control the consumption of customers of electric power. In this paper, Wireless Smart Electrical Power Meter has been designed and implemented which ZigBee wireless sensor network (WSN) will be used for wireless electrical power meter communication supported by PIC microcontroller which used for power unit measurements. PIC microcontroller will be used for evaluating all electric power parameters at costumer side like Vrms, Irms, KWh, and PF, and then all these parameters will be send to base station through wireless network in order to be calibrated and monitored.

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Kobernik, V. S. „Fuel consumption of thermal power technologies under maneuvering modes“. Problems of General Energy 2020, Nr. 4 (22.12.2020): 45–49. http://dx.doi.org/10.15407/pge2020.04.045.

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A characteristic feature of the present day development of power engineering lies in the increase in the unevenness of power systems schedules. The structure of generating powers of Ukrainian energy engineering is overloaded with basic powers and characterized by a sharp deficit of maneuvering wanes. To cover the uneven load of the power system during the operation of existing and construction of new power plants, it is necessary to take into account the possibility of their operation under maneuvering modes. This paper determines the influence of work of power plants i under maneuvering modes on the specific consumption of conditional fuel on the released electric energy at working on gas or coal fuel. Fuel consumption for starting of a unit depends on its type and downtime in reserve. The use of steam–and–gas facilities and gas turbines helps to enhance the maneuverability of power plants. Alternative options for the development of thermal energy are the introduction of gas–piston power plants and power units with fluidized–bed boilers. We present formulas for the calculations of fuel consumption on by power units for start–ups and specific consumptions depending on the load and degree of their involvement to regulating loads for different thermal energy technologies: steam–turbine condensation and district heating power units; steam–and–gas and gas turbine plants; gas piston installations; power units with fluidized bed boilers. For enhancing the maneuverability of power plants, working on fossil fuels, their modernization and renewal of software are necessary. Quantitative assessment of the efficiency of power units and separate power plants during their operation under variable modes is important for forecasting the structure of generating capacities of power systems, the need to introduce peak and semi–peak capacities, the choice of the most profitable composition of operating equipment at different schedules of electrical loads Keywords: thermal power, power unit, maneuverable mode, electrical load, specific fuel consumption

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Dani Ali, Nurhalim, und Azriyenni Azhari Zakri. „Identifying Characteristic of Power Quality Problems on Solar Electric Power Generation“. International Journal of Electrical, Energy and Power System Engineering 1, Nr. 2 (05.11.2018): 6–8. http://dx.doi.org/10.31258/ijeepse.1.2.6-8.

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The influence of connected electrical load will cause significant problems on Solar Electric Power Generator (SEPG). The problems are extremely important to be identification in order to provide electrical energy optimally. The objective of this paper is tantamount to investigate the impact of household electrical load on SEPG with variation and continuous electrical load. The identification of power quality was made by marking several test point on each output of SEPG unit. The level quality of voltage and frequency system needed to be measured and observed its performance indicator level. Furthermore, it compared by existing standard. To variation electrical load test, the results showed that the frequency of the system changed from 52 Hz to 262 Hz. In other hands, the frequency rose about five times against normal frequency. The continuous load test, that frequency of system fluctuated around 52 Hz to 156 Hz that also showed abnormal operation of SEPG.

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Dissertationen zum Thema "Electrical power unit"

Machuca, Julían, und Thomas Tuvesson. „PCB design of Power Distributor Unit (PDU)“. Thesis, Uppsala universitet, Institutionen för elektroteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-415474.

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The project idea was created from the demand of a renewal for a Power Distributor Unit also known as a PDU. The current product had successively turned in to a cable mess because of short term solutions. This made the product non user friendly, inconvenient and non-agile to handle troubleshooting. To develop this project, a PCB design was created by simplifying and improving circuit diagrams until satisfied. Once the final circuit diagram was obtained, a PCB layout design was created. The result of the project, due to limited time, was only theoretical. The finished product was not tested as there was no time allowing this.

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Jain, Sheetal A. 1980. „Low-power single-precision IEEE Floating-point unit“. Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87426.

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Zhuang, Fulin 1956. „Optimal generation unit commitment in thermal electric power systems“. Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75896.

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This thesis is devoted to the optimal commitment of generation units in an all-thermal, single or multiple area, power system. The problem, known as unit commitment, is a nonlinear mixed program typically with thousands of 0-1 integer variables and diverse constraints. An exact optimal solution to the problem is only possible via (explicit or implicit) enumeration, which requires a prohibitively long computation time for large problem instances.
Two optimization approaches, Lagrangian relaxation and simulated annealing, are explored in this thesis for efficient and near-optimal unit commitment.
Lagrangian relaxation combines the solution of the dual of the unit commitment problem with feasibility search to obtain primal feasible solutions. The feasibility search is necessary because a solution to the dual seldom solves the primal, and because little theory is available to bridge the optimal dual and primal solutions. In this thesis, several new feasibility search procedures to find a near-optimal primal feasible solution from the dual solution are developed and tested. These procedures are independent of the data constituting different problem instances, and are more rigorous and systematic than the existing ones. With these procedures, Lagrangian relaxation is successfully and efficiently applied to both single and multiple area unit commitment.
Simulated annealing exploits the resemblance between a minimization process and the cooling of a molten metal. The method generates feasible solution points randomly and moves among these points following a strategy which leads to a global minimum in a statistical sense. Simulated annealing is very flexible for handling diverse and complicated constraints, such as those typical of the unit commitment problem. Simulated annealing is analyzed, evaluated and implemented for unit commitment in this thesis.
Five major algorithms, proposed in this thesis for unit commitment and reserve-constrained economic dispatch, are extensively tested and compared by numerical simulation on sample power systems of 10 to 100 units. The simulation results show the efficiency of the tested algorithms for large-scale unit commitment and demonstrate the general applicability of simulated annealing. A comparison with the priority list method and a study of the convergence rates of the subgradient type algorithms are also included in the simulation.

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Kandil, Nahi A. „Unit Response Modeling and Forecasting for a Large Electric Power System“. Ohio University / OhioLINK, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1239730577.

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Rahmqvist, Elin. „On stochastic unit commitment for thermal power plants“. Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285519.

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Climate change is a fact, a crisis threatening every country, economy and human. Toprevent this crisis, the emission of greenhouse gases needs to decrease dramatically. 72%of global greenhouse gas emissions in 2016 came from energy production where electricityand heat account for 42% of the 72%. Nevertheless, coal power grew with 28% in2018 to meet the increased demand of electricity. It is therefore of utmost importancethat the resources used in power plants are distributed as efficiently as possible. Unitcommitment is a short-term planning formulation which is part of the planning chain forproduction of electrical energy. An accurate unit commitment can decrease emissionsand costs.The aim of this study is to implement a model for the stochastic behavior of the electricalload into unit commitment. With this, it shall be evaluated, whether this solutionis robust enough for usage in network control. The evaluation needs to assess the reliability,economic impact and the computational e↵ort for solving the stochastic unitcommitment problem.A test system has been created in MATLAB to evaluate the stochastic versus deterministicunit commitment formulation. Scenarios for the stochastic unit commitmenthave been generated by using a stationary, discrete-time Markov Chain to generate loadforecast errors. The Fast Forward Selection method has been used to reduce number ofscenarios to minimize computational e↵ort. The quality of the solution has then beenevaluated with value of the stochastic solution for economic analysis. Loss of load probabilityand energy not served have been used to evaluate the reliability.A stochastic approach gives a more robust solution but can be more expensive in termsof costs. Five scenarios were the optimal choice for the stochastic unit commitmentformulation. Increasing number of scenarios did not improve the reliability and resultedin a more expensive solution. The conclusion of this work can be contradictory but highlightsone of the challenges in electric power systems. A more robust system is usuallymore costly and therefore the players in the system must decide what is most desirablein this particular system. A more reliable but expensive system or a less reliable andless costly system.
Klimatförändringarna är ett faktum, en kris som hotar varje land, ekonomi och människa.‌För att förebygga denna kris måste utsläppen av växthusgaser minska dramatiskt. 72 % av de globala utsläppen av växthusgaser år 2016 kom från energiproduktion där värme och elektricitet stod för 42 % av dessa utsläpp. Trots detta växte kolkraften med 28% år 2018 för att kunna möta den ökande efterfrågan på elektricitet. Det är därför av yttersta vikt att dessa resurser används på ett så e↵ektivt sätt som möjligt. En bra och exakt korttidsplanering av kraftsystem kan minska utsläppen och kostnaderna.Målet med denna studie är att implementera stokastisk last i korttidsplaneringen för ett mindre elkraftsystem med 11 enheter. Detta kräver en robust metod som begränsar beräkningstiden för att säkerställa kontinuerlig och säker drift av elkraftsystemet. Analysen måste utvärdera tillförlitligheten, ekonomiska e↵ekterna och beräkningstiden för att lösa det stokastiska korttidsplaneringsproblemet.Ett testsystem har skapats i MATLAB för att utvärdera den stokastiska kontra deterministiska korttidsplaneringsproblemet. Scenarier för det stokastiska korttidsplaneringen har genererats genom att använda en stationär Markov-kedja för att generera felen i lastprognosen och sedan använda Fast Forward Selection metoden för att minska antalet scenarier för att minimera beräkningsinsatsen. Stokastisk korttidsplanering har sedan utvärderats med värdet av den stokastiska lösningen för ekonomisk analys. Sannolikheten för bortkoppling av last samt icke levererad energi har beräknats för att utvärdera tillförlitligheten.En stokastisk metod ger en mer robust lösning men kan vara dyrare vad gäller kostnader. Fem scenarier var det optimala valet för den stokastiska korttidsplaneringsformuleringen. Ö kande av antal scenarier förbättrade inte tillförlitligheten och resulterade i en dyrare lösning. Slutsatsen i detta arbete kan kännas motsägelsefullt då den deterministiska metoden visar på lägre kostnader medans den stokastiska är mer robust. Detta belyser en av utmaningarna i elkraftsystem. Ett mer robust system är vanligtvis dyrare och därför måste aktörerna i systemet bestämma vad som är mest önskvärt i det specifika systemet. Ett mer tillförlitligt men dyrare system eller ett mindre pålitligt och billigaresystem.

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Restrepo, Jose Fernando. „Unit commitment with primary frequency regulation constraints in electric power systems“. Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18210.

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The unit commitment problem with secondary and tertiary reserve requirements with time constants ranging from two to thirty minutes has been broadly studied in electric power systems. In contrast, the scheduling of units offering primary frequency regulation reserve deployable within seconds of a contingency has received relatively little attention. In this dissertation we formulate and solve a unit commitment problem explicitly accounting for the characteristic that primary frequency regulation has a single common degree of freedom, namely, the system frequency deviation. The simultaneous scheduling of energy, primary and tertiary reserves is then studied through a number of cases of up to 34 generating units.
Le problème de la planification de l’opération des unités de production d’électricité comprenant des spécifications des niveaux de régulation secondaire et tertiaire (celles-ci agissant sur un horizon de temps compris entre deux et trente minutes) a été amplement étudié. Le problème de planification de la production comprenant les aspects relatifs à la régulation primaire, agissant en fonction des variations de fréquence du réseau dans un horizon de temps de quelques secondes, n’a cependant reçu que peu d’attention jusqu’à maintenant. Dans ce mémoire, nous développons et solutionnons le problème de la planification de la production d’électricité en incluant la notion de la régulation primaire. On démontre que celle-ci est gouvernée explicitement et uniquement par la variation de la fréquence du réseau. Ensuite, la planification simultanée de la production d’énergie et de la fourniture des services de régulation primaire et tertiaire est étudiée via des études de cas sur des systèmes types possédant jusqu’à 34 unités de production.

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Ofori-Tenkorang, John. „A microprocessor-controlled household power monitoring unit by John Ofori-Tenkorang“. Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14288.

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Uong, Hoang. „The application of the ordered list method and the dynamic programming to the unit commitment“. PDXScholar, 1989. https://pdxscholar.library.pdx.edu/open_access_etds/3948.

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Wu, Zhi. „Transmission expansion planning and unit commitment with large-scale integration of wind power“. Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6738/.

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The large-scale integration of wind generation into the power system brings great challenges to transmission expansion planning (TEP) and unit commitment (UC). The intermittence nature of wind generation needs to be fully considered in these two problems, which stimulates the research of this thesis. The selection of candidate lines is the prerequisite for the TEP problem. Considering the limitations of manual selection approach, a method to select candidate lines automatically is proposed, which consists of five stages to reinforce existing corridors and new corridors. Results of the two test systems illustrate that the locational marginal price difference is neither sufficient nor necessary condition for candidate lines. The uncertainty of load demand and wind power is studied both in the TEP and UC problems. In the term of TEP, a two-stage stochastic formulation of TEP is proposed. The stochastic dual dynamic programming (SDDP) approach is applied to consider the uncertainty, and the whole model is solved by Benders decomposition (BD) technique. In the term of UC, the chance-constrained two-stage programming formulation is proposed for the day-ahead UC problem. The chance-constrained stochastic programming formulation is converted into an equivalent deterministic formulation by a sequence of approximation and verification.

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Ghassempour, Aghamolki Hossein. „Phasor Measurement Unit Data-based States and Parameters Estimation in Power System“. Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6505.

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The dissertation research investigates estimating of power system static and dynamic states (e.g. rotor angle, rotor speed, mechanical power, voltage magnitude, voltage phase angle, mechanical reference point) as well as identification of synchronous generator parameters. The research has two focuses: i. Synchronous generator dynamic model states and parameters estimation using real-time PMU data. ii.Integrate PMU data and conventional measurements to carry out static state estimation. The first part of the work focuses on Phasor Measurement Unit (PMU) data-based synchronous generator states and parameters estimation. In completed work, PMU data-based synchronous generator model identification is carried out using Unscented Kalman Filter (UKF). The identification not only gives the states and parameters related to a synchronous generator swing dynamics but also gives the states and parameters related to turbine-governor and primary and secondary frequency control. PMU measurements of active power and voltage magnitude, are treated as the inputs to the system while voltage phasor angle, reactive power, and frequency measurements are treated as the outputs. UKF-based estimation can be carried out at real-time. Validation is achieved through event play back to compare the outputs of the simplified simulation model and the PMU measurements, given the same input data. Case studies are conducted not only for measurements collected from a simulation model, but also for a set of real-world PMU data. The research results have been disseminated in one published article. In the second part of the research, new state estimation algorithm is designed for static state estimation. The algorithm contains a new solving strategy together with simultaneous bad data detection. The primary challenge in state estimation solvers relates to the inherent non-linearity and non-convexity of measurement functions which requires using of Interior Point algorithm with no guarantee for a global optimum solution and higher computational time. Such inherent non-linearity and non-convexity of measurement functions come from the nature of power flow equations in power systems. The second major challenge in static state estimation relates to the bad data detection algorithm. In traditional algorithms, Largest Normalized Residue Test (LNRT) has been used to identify bad data in static state estimation. Traditional bad data detection algorithm only can be applied to state estimation. Therefore, in a case of finding any bad datum, the SE algorithm have to rerun again with eliminating found bad data. Therefore, new simultaneous and robust algorithm is designed for static state estimation and bad data identification. In the second part of the research, Second Order Cone Programming (SOCP) is used to improve solving technique for power system state estimator. However, the non-convex feasible constraints in SOCP based estimator forces the use of local solver such as IPM (interior point method) with no guarantee for quality answers. Therefore, cycle based SOCP relaxation is applied to the state estimator and a least square estimation (LSE) based method is implemented to generate positive semi-definite programming (SDP) cuts. With this approach, we are able to strengthen the state estimator (SE) with SOCP relaxation. Since SDP relaxation leads the power flow problem to the solution of higher quality, adding SDP cuts to the SOCP relaxation makes Problem’s feasible region close to the SDP feasible region while saving us from computational difficulty associated with SDP solvers. The improved solver is effective to reduce the feasible region and get rid of unwanted solutions violate cycle constraints. Different Case studies are carried out to demonstrate the effectiveness and robustness of the method. After introducing the new solving technique, a novel co-optimization algorithm for simultaneous nonlinear state estimation and bad data detection is introduced in this dissertation. ${\ell}_1$-Norm optimization of the sparse residuals is used as a constraint for the state estimation problem to make the co-optimization algorithm possible. Numerical case studies demonstrate more accurate results in SOCP relaxed state estimation, successful implementation of the algorithm for the simultaneous state estimation and bad data detection, and better state estimation recovery against single and multiple Gaussian bad data compare to the traditional LNRT algorithm.

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Bücher zum Thema "Electrical power unit"

Huang, Yuping, Panos M. Pardalos und Qipeng P. Zheng. Electrical Power Unit Commitment. Boston, MA: Springer US, 2017. http://dx.doi.org/10.1007/978-1-4939-6768-1.

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Zuev, Sergey, Ruslan Maleev und Aleksandr Chernov. Energy efficiency of electrical equipment systems of autonomous objects. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1740252.

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When considering the main trends in the development of modern autonomous objects (aircraft, combat vehicles, motor vehicles, floating vehicles, agricultural machines, etc.) in recent decades, two key areas can be identified. The first direction is associated with the improvement of traditional designs of autonomous objects (AO) with an internal combustion engine (ICE) or a gas turbine engine (GTD). The second direction is connected with the creation of new types of joint-stock companies, namely electric joint-stock companies( EAO), joint-stock companies with combined power plants (AOKEU). The energy efficiency is largely determined by the power of the generator set and the battery, which is given to the electrical network in various driving modes. Most of the existing methods for calculating power supply systems use the average values of disturbing factors (generator speed, current of electric energy consumers, voltage in the on-board network) when choosing the characteristics of the generator set and the battery. At the same time, it is obvious that when operating a motor vehicle, these parameters change depending on the driving mode. Modern methods of selecting the main parameters and characteristics of the power supply system do not provide for modeling its interaction with the power unit start-up system of a motor vehicle in operation due to the lack of a systematic approach. The choice of a generator set and a battery, as well as the concept of the synthesis of the power supply system is a problem studied in the monograph. For all those interested in electrical engineering and electronics.

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Hobbs, B. F. The next generation of electric power unit commitment models. Herausgegeben von ebrary Inc. New York: Kluwer Academic, 2002.

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Hobbs, Benjamin F., Michael H. Rothkopf, Richard P. O’Neill und Hung-po Chao, Hrsg. The Next Generation of Electric Power Unit Commitment Models. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/b108628.

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Alberta. Energy Resources Conservation Board. Review of the commissioning date of Genesee unit no. 1. Calgary: ERCB, 1992.

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Girgis, George K. Hungry Horse Unit 4 excitation system commissioning test. Denver, Colo: U.S. Bureau of Reclamation, 1992.

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Regulation, U. S. Nuclear Regulatory Commission Office of Nuclear Reactor. Draft environmental statement for decommissioning Humboldt Bay Power Plant, Unit no. 3, docket no. 50-133: Pacific Gas and Electric Company. Washington, D.C: U.S. Nuclear Regulatory Commission, Office of Nuclear Reactor Regulation, 1986.

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U.S. Nuclear Regulatory Commission. Office of Nuclear Reactor Regulation. Safety evaluation report related to the license renewal of Callaway Plant, Unit 1: Docket Number 50-483 : Union Electric Company (Ameren Missouri). Washington, DC: U.S. Nuclear Regulatory Commission, Office of Nuclear Reactor Regulation, 2015.

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U.S. Nuclear Regulatory Commission. Office of Nuclear Reactor Regulation. Technical specifications, Waterford Steam Electric Station, Unit no. 3, docket no. 50-382: Appendix "A" to license no. NPF-38. Washington, D.C: The Commission, 1985.

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U.S. Nuclear Regulatory Commission. Office of Nuclear Reactor Regulation. Technical specifications: Comanche Peak Steam Electric Station, unit 1 : docket no. 50-445, appendix "A" to license no. NPF-87. [Washington, DC]: The Office, 1990.

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Buchteile zum Thema "Electrical power unit"

Chanda, Pradip, und Suparna Mukhopaddhyay. „Chemical Health of Thermal Power Unit“. In Energy Systems in Electrical Engineering, 59–96. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2722-9_6.

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Ram, Kalyan B., Panchaksharayya S. Hiremath, M. S. Prajval, B. Karthick, Prasanth Sai Meda, M. B. Vijayalakshmi und Priyanka Paliwal. „Remote Labs for Electrical Power Transmission Lines Simulation Unit“. In Smart Industry & Smart Education, 186–96. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95678-7_21.

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Yin, Yong, Jihong Wang, Xing Luo und Shen Guo. „Development of a Battery Charging Management Unit for Renewable Power Generation“. In Lecture Notes in Electrical Engineering, 33–46. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2311-7_4.

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Mary Anita, J., und I. Jacob Raglend. „Power Flow Constrained Unit Commitment Problem Using Improved Shuffled Frog Leaping Algorithm“. In Lecture Notes in Electrical Engineering, 1545–55. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-2119-7_151.

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Boonseng, Chongrag, Rapeepornpat Boonseng, Nutthaphan Boonsaner, Vijit Kinnares, Promsak Apiratikul und Kunyanuth Kularbphettong. „Partial Discharge Phenomena in Power Capacitor Unit Insulation Under Harmonic Resonance Effects“. In Lecture Notes in Electrical Engineering, 534–48. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31676-1_51.

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Hong, Munan, Zhenhui Yao, Ling Su, Bo Liu und Wei Liang. „Lyapunov-Based Feedback Control of Auxiliary Power Unit for Series Hybrid Electric Vehicles“. In Lecture Notes in Electrical Engineering, 909–24. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8506-2_61.

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Huang, Shize, Lingyu Yang, Ji Xue und Kai Yu. „Urban Rail Transit Power Monitoring System Techniques Based on Synchronous Phasor Measurement Unit“. In Lecture Notes in Electrical Engineering, 251–68. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2914-6_25.

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Deshpande, Anagh, und T. Vigneswaran. „Design of Arithmetic and Logic Unit (ALU) Using Subthreshold Adiabatic Logic for Low-Power Application“. In Lecture Notes in Electrical Engineering, 201–9. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7251-2_22.

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Xi, Wang, Wei Liu, Tao Bai und Ji Shi. „A Study About Unit Testing for Embedded Software of Control System in Nuclear Power Plant“. In Lecture Notes in Electrical Engineering, 157–63. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3456-7_17.

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Gao, Zhenjun, Jianrui Liu, Chenxu Guo, Wei Fu und Xiaoke He. „The Strength Study of Thermal Power Unit Absorption Tower Desulphurization Pump Impeller Based on Fluid-Structure Interaction Calculation“. In Lecture Notes in Electrical Engineering, 237–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48224-7_29.

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Konferenzberichte zum Thema "Electrical power unit"

Khan, Muhammad Bilal, und Muhammad Owais. „Automatic power factor correction unit“. In 2016 International Conference on Computing, Electronic and Electrical Engineering (ICE Cube). IEEE, 2016. http://dx.doi.org/10.1109/icecube.2016.7495239.

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Raade, Justin W., Kurt R. Amundson und H. Kazerooni. „Development of Hydraulic-Electric Power Unit for Mobile Robots“. In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80138.

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Energetic autonomy of a hydraulic-based mobile robot requires a power source capable of both hydraulic and electrical power generation. The hydraulic power is used for locomotion and the electric power is used for the control computer, sensors and other peripherals. In addition, the power source must be lightweight and quiet. This study presents several designs of internal combustion engine-based power units. Each power unit is evaluated with a Ragone plot which shows its performance over a wide range of operation times. The best-performing design of the hydraulic-electric power units (HEPU), based upon the Ragone plot analysis, is described in detail. This HEPU produces constant pressure hydraulic power and constant voltage electric power. The pressure and voltage are controlled on board the power unit by a computer. A novel characteristic of this power unit is its cooling system in which hydraulic fluid is used to cool the engine cylinders. The prototype power unit weighs 27 kg and produces 2.3 kW (3.0 hp) hydraulic power at 6.9 MPa (1000 psi) and 220 W of electric power at 15 VDC.

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Lee, Jong-Mu, Seung-Wook Hyun und Chung-Yuen Won. „High efficiency power supply unit for server power application“. In 2015 18th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2015. http://dx.doi.org/10.1109/icems.2015.7385080.

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Varadi, A. Sz, und J. Takacs. „Experimental Wind Energy Unit in Northern Hungary“. In 2007 International Conference on Clean Electrical Power. IEEE, 2007. http://dx.doi.org/10.1109/iccep.2007.384279.

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Bhardwaj, Amit, Vikram Kumar Kamboj, Vijay Kumar Shukla, Bhupinder Singh und Preeti Khurana. „Unit commitment in electrical power system-a literature review“. In 2012 IEEE International Power Engineering and Optimization Conference (PEOCO). IEEE, 2012. http://dx.doi.org/10.1109/peoco.2012.6230874.

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Zhou, Xiang, Shangyan Zou, Wayne W. Weaver und Ossama Abdelkhalik. „Control of Wave Energy Converter With Losses in Electrical Power Take-Off System“. In ASME 2021 Power Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/power2021-64938.

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Abstract A permanent magnet linear electrical machine power takeoff (PTO) unit is simulated on the direct drive wave energy converter in this paper, which is controlled to provide the required reactive power. A shape-based control is implemented to maximize the wave energy production (mechanical PTO) with the limiting constraints on the electric drive. Further, the linear electrical machine design is optimized such that the electrical power output is maximized (e.g., reduced power losses). The numerical simulations are conducted using MATLAB/Simulink and the Simscape toolbox. Linear wave theory is applied in modeling the buoy dynamics. Additionally, the PTO unit is composed of a linear electrical machine, an ideal inverter, and an ideal energy storage system. The results show the proposed PTO tracks the reference control accurately. The electrical power output is significantly improved by limiting the current in the PTO compared to a passive control.

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Li, Ran, Mingqiang Wang und Weilun Wang. „Robust Unit Commitment with CVaR of Wind Power“. In 2021 3rd Asia Energy and Electrical Engineering Symposium (AEEES). IEEE, 2021. http://dx.doi.org/10.1109/aeees51875.2021.9402994.

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Belsky, Aleksey A., und Vasiliy S. Dobush. „Oil wellbore electrical heating station with wind-driven power unit“. In 2016 Electric Power Quality and Supply Reliability (PQ). IEEE, 2016. http://dx.doi.org/10.1109/pq.2016.7724120.

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Kabisch, M., M. Heuer, G. Heideck und Z. A. Styczynski. „Energy management of vehicle electrical system with auxiliary power unit“. In 2009 IEEE Vehicle Power and Propulsion Conference (VPPC). IEEE, 2009. http://dx.doi.org/10.1109/vppc.2009.5289826.

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Husted, Harry L. „Dual-Voltage Electrical System with a Fuel Cell Power Unit“. In Future Transportation Technology Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-3067.

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Berichte der Organisationen zum Thema "Electrical power unit"

Carl R. Bozzuto, Nsakala ya Nsakala, Gregory N. Liljedahl, Mark Palkes und John L. Marion. AMERICAN ELECTRIC POWER'S CONESVILLE POWER PLANT UNIT NO.5 CO2 CAPTURE RETROFIT STUDY. Office of Scientific and Technical Information (OSTI), Juni 2001. http://dx.doi.org/10.2172/891318.

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McBroom, Scott T., Julian Garza und Pat Wildemann. Development of an Auxiliary Power Unit Specification for Medium Duty Series Hybrid Electric Vehicles. Fort Belvoir, VA: Defense Technical Information Center, Juni 1998. http://dx.doi.org/10.21236/ada346303.

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Author, Not Given. Tampa Electric Company, Polk Power Station Unit No. 1. Annual report, January--December 1992. Office of Scientific and Technical Information (OSTI), Oktober 1993. http://dx.doi.org/10.2172/10124963.

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Tampa Electric Company, Polk Power Station Unit No. 1, preliminary public design report. Office of Scientific and Technical Information (OSTI), Juni 1994. http://dx.doi.org/10.2172/78571.

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Tampa Electric Company Polk Power Station Unit Number 1. Annual report, January--December, 1993. Office of Scientific and Technical Information (OSTI), August 1994. http://dx.doi.org/10.2172/10115164.

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