Relevant bibliographies by topics / Power and load factor

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Power and load factor'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Power and load factor.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Power and load factor"

1

Ammar, M., S. Eskander, and Ibrahim Safwat. "Automatic control of load power factor." International Conference on Electrical Engineering 9, no. 9th (May 1, 2014): 1–13. http://dx.doi.org/10.21608/iceeng.2014.30464.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Stojce Ilcev, Dimov. "Analysis of power factor corrections for obtaining improved power factors of switching mode power supply." International Journal of Engineering & Technology 9, no. 3 (September 30, 2020): 826. http://dx.doi.org/10.14419/ijet.v9i3.31086.

Full text
Abstract:
This article discusses such an important issue as the power factor of Switching Mode Power Supply (SMPS) and its improvement through Power Factor Correction (PFC). The power factor shows how effectively uses the consumption of electric energy by certain loads connected to the power distribution system with Alternative Current (AC), which is very critical for the electricity-producing industry. The number of power factors is a dimensionless value that can vary from -1 to 1. Thus, in an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of transferring useful power, which may cause overloading of the power grid and lead to over-expenditure of electricity. Otherwise, designing power factor correction (PFC) into modern switched-mode power supplies (SMPS) has evolved over the past few years due to the introduction of many new controller integrated circuits (IC). Today, it is possible to design a variety of PFC circuits with different modes of operation, each with its own set of challenges. As the number of choices has increased, so has the complexity of making the choice and then executing the new design. In this article, the design considerations and details of operation for the most popular approaches are provided.
APA, Harvard, Vancouver, ISO, and other styles
3

Roopa C, Prof. "Case Study on Automatic Power Factor Compensation for Industrial Power." International Journal for Research in Applied Science and Engineering Technology 9, no. VII (July 31, 2021): 2691–94. http://dx.doi.org/10.22214/ijraset.2021.36958.

Full text
Abstract:
In an electrical power grid, for an equal amount of usable power transmitted, a load with a coffee power factor draws more current than a load with a small power factor. The higher currents increase the loss of energy in the distribution network and require larger wires and other equipment. Due to the costs of larger equipment and waste energy, electrical utilities will usually charge a much higher cost to industrial or commercial customers where a low power factor is present. Low-power factor linear loads (such as induction motors) are often corrected with a passive condenser or inductor network. The present drawn from the system is distorted by non-linear loads, like rectifiers. In such cases, the correction of the active or passive power factor may also counteract the distortion and lift the factor of the facility. The facility factor correction devices may also be installed at a central substation, opened over a distribution grid, or built into power-consuming equipment.
APA, Harvard, Vancouver, ISO, and other styles
4

Yani, Ahmad, Junaidi Junaidi, M. Irwanto, and A. H. Haziah. "Optimum reactive power to improve power factor in industry using genetic algortihm." Indonesian Journal of Electrical Engineering and Computer Science 14, no. 2 (May 1, 2019): 751. http://dx.doi.org/10.11591/ijeecs.v14.i2.pp751-757.

Full text
Abstract:
<span>Capacitor bank is a collection of power tools in the form of a capacitor that serves as a tool that can reduce or improve reactive power into the power grid. The load on the electricity network in general is an inductive load. If the average power factor (cos ϴ) is less than 0.85, the State Electricity Company will provide the reactive power in KVAR fines usage charges on customers. An effort should be done to reduce the reactive power. An installation of bank capacitor is suitable to be implemented in an industry AC loads. It will reduce the reactive power and improve the power factor. In the case of 380 V, 50 Hz, 500 kW AC loads are improved the power factor from 0.7 to 0.93 using genetic algorithm, thus the AC loads current and reactive power will be decreased. It is suitable that the AC loads current is inversely proportional to the power factor, and the reactive power is proportional to the AC loads current.</span>
APA, Harvard, Vancouver, ISO, and other styles
5

Subramanian, Karthik, and Shantam Tandon. "Power factor correction using capacitors & filters." International Journal of Engineering & Technology 7, no. 2.12 (April 3, 2018): 234. http://dx.doi.org/10.14419/ijet.v7i2.12.11288.

Full text
Abstract:
Power factor is the ratio of the real current or voltage received by a load to the root mean square (rms) value of the current or voltage that was supposed to be acquired by the same load. The fact that the two become different is due to the presence of reactive power in the circuit which gets dissipated.Improving the power factor means reducing the phase difference between voltage and current. Since majority of the loads are of inductive nature, they require some amount of reactive power for them to function. Therefore, for the better use of electrical appliances with minimum amount of electrical consumption, the power factor should necessarily be increased and should be brought near to 1. This can be easily done by the help of Automatic Power Factor Correction Capacitors and Active filters.
APA, Harvard, Vancouver, ISO, and other styles
6

Coman, Ciprian Mihai, Adriana Florescu, and Constantin Daniel Oancea. "Improving the Efficiency and Sustainability of Power Systems Using Distributed Power Factor Correction Methods." Sustainability 12, no. 8 (April 13, 2020): 3134. http://dx.doi.org/10.3390/su12083134.

Full text
Abstract:
For the equipment connected to the three-phase or single-phase grid, the power factor represents an efficiency measure for the usage of electrical energy. The power factor improvement through correction methods reduces the load on the transformers and power conductors, leading to a reduction of losses in the mains power supply and a sustainable grid system. The implications at the financial level are also important. An example of load that generates a small power factor is represented by a motor without mechanical load or having a small mechanical load. Given the power factor correction (PFC), the costs are reduced through the elimination of penalties, applying only in the common coupling point (CCP). The advantages of using equipment for the power factor correction are related also to their long operation duration and the easiness of their installation. The device presented in this article takes advantage of the advances in information and communication technology (ICT) to create a new approach for telemetry and remote configuration of a PFC. This approach has flexibility and versatility, such that it can be adapted to many loads, easily changing the capacitance steps and settings of the power factor correction device.
APA, Harvard, Vancouver, ISO, and other styles
7

Ammar, M., S. Eskander, A. Elmitwally, and A. Shahin. "Controlling the Load Power Factor Automatically. (Dept. E. )." Bulletin of the Faculty of Engineering. Mansoura University 39, no. 3 (July 13, 2020): 1–8. http://dx.doi.org/10.21608/bfemu.2020.102727.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Lin, Bor-Ren, Shuh-Chuan Tsay, and Mu-Shan Liao. "Integrated power factor compensator without load current measurement." International Journal of Electronics 88, no. 11 (November 2001): 1189–204. http://dx.doi.org/10.1080/00207210110081124.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Yani, Ahmad. "Improvement of Load Power Factor by Using Capacitor." IOSR Journal of Electrical and Electronics Engineering 12, no. 01 (March 2017): 30–34. http://dx.doi.org/10.9790/1676-1201043034.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Coleman, Nicholas S., and Karen N. Miu. "Distribution Load Capability With Nodal Power Factor Constraints." IEEE Transactions on Power Systems 32, no. 4 (July 2017): 3120–26. http://dx.doi.org/10.1109/tpwrs.2016.2625599.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Power and load factor"

1

Meng, Tianyu. "Study on Plant Load Factor of Wind Power CDM Projects." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204402.

Full text
Abstract:
Clean Development Mechanism (CDM), is a market-based mechanism under the Kyoto Protocol. It allows developed countries to implement emission reduction projects in developing countries, to assist their sustainable development; meanwhile, developed countries gain credits which could be used to meet part of their emission reduction targets under this protocol. There is a wide range of various types of CDM projects, among which, wind power projects account for the largest share. Additionality is a key component for CDM projects’ eligibility and to ensure CDM’s environmental integrity. It means that the emission reduction after the implementation of the project is additional to any that would have occurred in the absence of the certified CDM project. For wind CDM projects, the controversy on additionality raised debate and attention internationally, especially the concern if project developers deliberately underestimated Plant Load Factor (PLF) so as to meet the CDM additionality criterion. At the United Nations Framework Convention on Climate Change (UNFCCC) CDM Executive Board 63rd meeting, the UNFCCC Secretariat and the Registration and Issuance Team (RIT) proposed different decisions regarding a request forissuance of a Wind CDM project due to different views on the estimated PLF. The Board discussed the issue andrequested a study on the PLF variations, which is the origin, and also a partial content of this thesis.In this thesis, relevant parameters are firstly defined – parameters such as Estimated PLF, Actual PLF, etc, and to better illustrate the magnitude of the PLF variation, the concept of Relative Variation of PLF is adopted, which is measured as the absolute difference of Estimated PLF and Actual PLF compared with Estimated PLF. Then a database in spreadsheet with all defined parameters of sampled projects is set up on the basis of collected information and calculation. Afterwards an investigation of PLFs and comparison analyses of Estimated PLFs and Actual PFLs is conducted. Considering there are two groups of Wind CDM projects, i.e. small-scale and large-scale; and considering the distributions of projects’ hosting countries, the comparison analyses are then conducted firstly for all projects, and then separated for small-scale and large-scale projects, and lastly separated for projects based on different hosting countries. The final results show that a minority of projects have underestimated PLFs, and a very small proportion of projects, either in all projects, or on different scales or in different hosting countries have underestimated PLFs to a level that is out of acceptable range. Therefore, thestudy concludes that there should be no concern on the PLF issue in Wind CDM projects.
APA, Harvard, Vancouver, ISO, and other styles
2

Ruckdaschel, James David. "Harmonic Analysis of a Static VAR Compensated Mixed Load System." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/82.

Full text
Abstract:
As power electronic based controllers and loads become more prevalent in power systems, there is a growing concern about how the harmonics generated by these controllers and loads affect the power quality of the system. One widely used power electronic based load is the Variable Frequency Drive (VFDs) used to vary the speed of an induction motor; whereas a common example of a power electronic based controller used in power systems is the Static VAR Compensator (SVC) for improving a system’s power factor. In this thesis, the harmonic content and overall performance of a system including both a VFD and a SVC will be studied and analyzed. Specifically, the cases of no compensation, static capacitor compensation, and power electronic based static VAR compensation are examined. A small-scale model of a system for study was constructed in lab. Several cases were then performed and tested to simulate a system which contained both fixed and power electronic based harmonic generating loads. The performance of each case was determined by total harmonic current and voltage distortions, true power factor, and RMS current levels at different points in the system.
APA, Harvard, Vancouver, ISO, and other styles
3

Moynahan, Nathan A. "Development of a vehicle road load model for ECU broadcast power verification in on-road emissions testing." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4454.

Full text
Abstract:
Thesis (M.S.)--West Virginia University, 2005.
Title from document title page. Document formatted into pages; contains xi, 117 p. : ill. (some col.), col. map. Includes abstract. Includes bibliographical references (p. 75-77).
APA, Harvard, Vancouver, ISO, and other styles
4

Struthers, Christopher Andrew. "Three phase load balancing and power factor correction using a pulse width modulated static compensator." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ62855.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Guelfi, Rangel [UNESP]. "Análise da relação entre o faturamento do consumo de energia elétrica e demanda de potência ativa e reativa utilizando hiperbolóides de carga e potência." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/87214.

Full text
Abstract:
Made available in DSpace on 2014-06-11T19:22:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-05-31Bitstream added on 2014-06-13T20:09:50Z : No. of bitstreams: 1 guelfi_r_me_ilha.pdf: 667745 bytes, checksum: 4cf02e10ba92af5e81fd3f18fda6f6cd (MD5)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
No presente trabalho é apresentado um método para o cálculo de volumes determinados por K-Hiperbolóides de Carga e Potência, de modo a reduzir os gastos de empresas consideradas, em relação ao fator de potência. A redução de gastos é obtida alterando-se o valor máximo do fator potência que se pretende chegar, do fator de potência ideal 1, para o fator de potência de referência 0,92, ou mantendo-o quando já estiver acima de 0,92. Quando o fator de potência é maior ou igual a 0,92 ele já está eficiente, assim, não há necessidade de se chegar ao fator de potência ideal. É realizada uma comparação entre um método existente na literatura e o método proposto no presente trabalho, para determinar os pontos em que estes métodos diferem no cálculo dos volumes determinados pelos K-Hiperbolóides de Carga e Potência e mostrar a eficácia do método proposto. Estes métodos são equiparados, com relação a redução obtida no faturamento da conta de energia elétrica. A redução no faturamento da conta de energia elétrica que deve ser pago à concessionária é obtida por meio da diminuição da demanda contratada pela empresa; por sua vez a diminuição desta demanda é alcançada através da fórmula do fator de carga. Considerando-se a demanda média e o maior fator de carga obtido no período em estudo, encontra-se assim, uma nova demanda máxima menor que a demanda atual utilizada pela empresa. Logo, esta demanda máxima passa a ser a demanda que será contratada pela empresa, assim, esta nova demanda resulta em uma nova fatura que deve ser paga a concessionária de energia elétrica, menor que a fatura atual.
The present work presents a method for the calculation of volumes determined for K- Load and Power Hyperboloid, in order to reduce the expenses of considered companies, in relation to the power factor. The reduction of expenses is gotten by changing the maximum value of the wished power factor, of the ideal power factor1, to the reference power factor 0,92,or keeping it when it s above 0,92. When the power factor is higher or equal 0,92, it s already efficient, thus, it is not necessary to achieve the ideal power factor. A comparison is carried between an existing method in the literature and the considered method in the present work, to determine the points where these methods differ from each other in the calculation of the volumes determined for the K-Load and Power Hyperboloid and to show the effectiveness of the considered method. These methods are equalized, regarding the reduction gotten in the invoicing of the electric energy account. The reduction in the invoicing of the account of electric energy that must be paid to the concessionaire is gotten through the reduction of the contracted demand by the company; in turn the reduction of this demand is reached through the formula of the load factor. Considering the average demand and the highest load factor gotten in the period in study, this way a new demand, lower than the current demand used by the company, is gotten. Therefore, this maximum demand starts to be the demand that will be contracted by the company, thus, this new demand results in a new invoice which must be paid to the concessionaire of electric energy, lower than the current invoice.
APA, Harvard, Vancouver, ISO, and other styles
6

Guelfi, Rangel. "Análise da relação entre o faturamento do consumo de energia elétrica e demanda de potência ativa e reativa utilizando hiperbolóides de carga e potência /." Ilha Solteira : [s.n.], 2007. http://hdl.handle.net/11449/87214.

Full text
Abstract:
Resumo: No presente trabalho é apresentado um método para o cálculo de volumes determinados por K-Hiperbolóides de Carga e Potência, de modo a reduzir os gastos de empresas consideradas, em relação ao fator de potência. A redução de gastos é obtida alterando-se o valor máximo do fator potência que se pretende chegar, do fator de potência ideal "1", para o fator de potência de referência "0,92", ou mantendo-o quando já estiver acima de 0,92. Quando o fator de potência é maior ou igual a 0,92 ele já está eficiente, assim, não há necessidade de se chegar ao fator de potência ideal. É realizada uma comparação entre um método existente na literatura e o método proposto no presente trabalho, para determinar os pontos em que estes métodos diferem no cálculo dos volumes determinados pelos K-Hiperbolóides de Carga e Potência e mostrar a eficácia do método proposto. Estes métodos são equiparados, com relação a redução obtida no faturamento da conta de energia elétrica. A redução no faturamento da conta de energia elétrica que deve ser pago à concessionária é obtida por meio da diminuição da demanda contratada pela empresa; por sua vez a diminuição desta demanda é alcançada através da fórmula do fator de carga. Considerando-se a demanda média e o maior fator de carga obtido no período em estudo, encontra-se assim, uma nova demanda máxima menor que a demanda atual utilizada pela empresa. Logo, esta demanda máxima passa a ser a demanda que será contratada pela empresa, assim, esta nova demanda resulta em uma nova fatura que deve ser paga a concessionária de energia elétrica, menor que a fatura atual.
Abstract: The present work presents a method for the calculation of volumes determined for K- Load and Power Hyperboloid, in order to reduce the expenses of considered companies, in relation to the power factor. The reduction of expenses is gotten by changing the maximum value of the wished power factor, of the ideal power factor"1", to the reference power factor "0,92",or keeping it when it’s above 0,92. When the power factor is higher or equal 0,92, it’s already efficient, thus, it is not necessary to achieve the ideal power factor. A comparison is carried between an existing method in the literature and the considered method in the present work, to determine the points where these methods differ from each other in the calculation of the volumes determined for the K-Load and Power Hyperboloid and to show the effectiveness of the considered method. These methods are equalized, regarding the reduction gotten in the invoicing of the electric energy account. The reduction in the invoicing of the account of electric energy that must be paid to the concessionaire is gotten through the reduction of the contracted demand by the company; in turn the reduction of this demand is reached through the formula of the load factor. Considering the average demand and the highest load factor gotten in the period in study, this way a new demand, lower than the current demand used by the company, is gotten. Therefore, this maximum demand starts to be the demand that will be contracted by the company, thus, this new demand results in a new invoice which must be paid to the concessionaire of electric energy, lower than the current invoice.
Orientador: Francisco Villarreal Alvarado
Coorientador: Antonio Padilha Feltrin
Banca: Sérgio Azevedo de Oliveira
Banca: Iara Fernanda Ehrenberg Dossi Denis
Mestre
APA, Harvard, Vancouver, ISO, and other styles
7

Wang, Ran. "Market power, cost efficiency and pricing strategies of domestic airline industry." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53930.

Full text
Abstract:
This dissertation first develops a theoretical framework to enable the estimation of cost efficiency and conduct parameter without total cost data. By validating this framework using U.S. airline data, this dissertation shows the feasibility of the theoretical framework. Based on the estimates of marginal cost efficiency and conduct parameter, this dissertation also finds some support for the Quiet Life Hypothesis. In Chapter III, this dissertation analyzes the determinants for price dispersion, especially conduct parameter and cost efficiency. Generally speaking, we find negative relationship between conduct parameter and price dispersion and negative relationship between marginal cost efficiency and price dispersion. In Chapter IV, this thesis examines the dynamics that lead to high price dispersion. To be more specific, this thesis concentrates on advanced days purchased and load factor.
APA, Harvard, Vancouver, ISO, and other styles
8

Pierce, Timothy M. Jr. "Mobile Hybrid Power System Theory of Operation." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/78148.

Full text
Abstract:
Efficiency is a driving constraint for electrical power systems as global energy demands are ever increasing. Followed by the introduction of diesel generators, electricity has become available in more locations than ever. However, operating a diesel generator on its own is not the most energy efficient. This is because the high crest factor loads, of many applications, decrease the fuel efficiency of a hydrocarbon generator. To understand this, we need to understand how an electrical load affects a generator. Starting with a load profile, a system designer must choose a generator to meet peak demand, marking the first instance where a load profile has influence over a generator. This decision will insure that brownouts do not occur, but, this will lead to poor energy efficiency. We say this because a generator is most energy efficient under heavier loads, meaning, during lighter loads, more fuel will be consumed to produce the same amount of energy. While this may be fine if the peak load was close to the average load, however, the actual crest factor for a typical residential load profile is much higher. This gap between peak and average load means that a generator will spend most of its time operating at its most inefficient point. To compensate for this, and reduce fuel consumption, the Mechatronics Lab at Virginia Tech has developed a mobile hybrid power system (MHPS) to address this problem. The solution was to augment a diesel generator with a battery pack. This allowed us to constrain the generator so that it only operates with fixed efficiency. It is the theory behind this system that will be covered in this thesis.
Master of Science
APA, Harvard, Vancouver, ISO, and other styles
9

VIEIRA, FRANCISCO ANIZIO. "THERMO-ACCUMULATION: AN EFFECTIVE ALTERNATIVE FOR INCREASING THE POWER LOAD FACTOR IN ELECTRICITY RETAILING LEADING TO DIFFERENTIATED TARIFF BILLINGS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=32996@1.

Full text
Abstract:
Desenvolvida no âmbito da linha de pesquisa Metrologia para Energia, a presente dissertação de mestrado tem como objetivo validar os benefícios da tecnologia da termoacumulação como alternativa técnica e economicamente viável para deslocamento de cargas elétricas em períodos de grande utilização. O projeto de pesquisa teve como motivação o estudo de alternativas tecnológicas para viabilizar tarifas diferenciadas. A metodologia utilizada incluiu a revisão da literatura especializada sobre regulação tarifária e termoacumulação; desenvolveu estudos de sistemas de distribuição subterrâneos e aéreos situados em regiões de grande demanda de energia elétrica no horário comercial e desenvolveu análise de sensibilidade técnico-econômica visando a proposição de alternativas tarifárias e políticas de deslocamento de carga. O trabalho se desenvolveu no contexto da segunda revisão tarifária do setor elétrico, que busca repartir os ganhos de eficiência obtidos pelos agentes do setor elétrico com os seus consumidores. Dentre os resultados do trabalho destacam-se: (i) a comprovação da viabilidade da aplicação da termoacumulação em sistemas de climatização, (ii) a redução de custos de operação e implantação de subestações de energia elétrica para consumidores de sistemas de refrigeração e (iii) e proposição de uma tarifa diferenciada que permite a mudança do perfil de carga de sistemas de refrigeração comerciais. Estudos realizados mostraram que a termoacumulação pode gerar redução dos custos de energia elétrica da ordem de 30 a 45 por cento. Como conclusões, o trabalho reconhece a importância de se implantar políticas que privilegiem novas alternativas tarifárias e ressalta os benefícios que resultam da adoção dessa tecnologia alternativa para o meio ambiente.
Studies have shown that thermo-accumulation is an attractive technology to increase the electric power load factor which can lower tariff billings in electricity retailing (30-45 percent), the motivation for this research project. The aim of the present M.Sc. dissertation is to validate the technological benefits of thermo-accumulation applied to the electric sector as an economically feasible alternative for power load displacement at peak mode. The methodology included a literature survey on tariff billings and the regulation of the electric sector; a study of aerial and underground distribution systems at locations of high power load demand; a technical-economic analysis (consumption and tariff) of power substations. Developed within the context of tariff billing revision where the electric sector shared energy-efficient gains with customers, the research project suggests alternate tariff schemes and power load displacement policies. Three major results were found: (i) the feasibility of thermo-accumulation in acclimatization; (ii) the reduction of operational cost of electricity for commercial air-conditioning users; (iii) a proposal for differentiated retailing tariff billings. To highlight the conclusions of the work, the use of the thermo-accumulation technology by electric companies was shown to be unmistakable. On the one hand it provides better tariff schemes for consumers and on the other it is environmentally friendly.
APA, Harvard, Vancouver, ISO, and other styles
10

Pauletti, Luiz Celestino. "Um estudo de uso de gradador de tensão em motores de indução monofásicos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/17566.

Full text
Abstract:
O motor de indução é, talvez, o mais robusto e, certamente, um dos motores mais comumente usados. Graças à simplicidade de sua construção, do seu baixo custo, confiabilidade e rendimento relativamente alto com carga nominal é provável que ele permaneça sendo a principal fonte de transformação de energia elétrica em energia mecânica nas aplicações industriais e comerciais por um futuro previsível. O estudo de economia de energia pela redução de perdas é o objetivo do presente estudo. Os motores de indução operam regularmente com fluxo quase constante no entreferro e, portanto, com perdas magnéticas quase constantes. A utilização de um circuito gradador de tensão em série com a alimentação do motor para reduzir o fluxo no entreferro pela redução da tensão aplicada quando a carga não requer fluxo total é o objeto de análise neste estudo. Com a redução da tensão, para manter o conjugado de operação, a velocidade de rotação diminui, ou seja, há um aumento no escorregamento até um valor ótimo para reduzir as perdas totais. Então, esperaria-se que com a redução da tensão aplicada, as perdas magnéticas decresceriam e a eficiência total cresceria. Via de regra, no motor de indução, dada a característica mergulhante de sua curva Conjugado x Velocidade na região em torno da velocidade nominal, o conjugado varia muito mais que a velocidade. Para operação eficiente, a sua tensão aplicada deve ser função da carga que traciona. É objetivo desse trabalho estudar um dispositivo que, colocado em série com a fonte de alimentação de um motor de indução de CA, promove a redução de potência fornecida ao motor, quando a carga aplicada ao motor é menor que a carga nominal. Uma análise da redução da tensão senoidal aplicada através de um auto-transformador de tensão variável é comparada com a redução da tensão através de um circuito gradador baseado em tiristores. A melhor tensão a ser obtida é a que reduz as perdas magnéticas ao mínimo, para cargas que não requerem o fluxo total no entreferro como quando da tensão nominal aplicada. As limitações do processo são estudadas e apresentadas.
The induction motor is perhaps the most rugged, and certainly one of the most commonly used motors. With simply construction, low cost, reliability and efficiency relatively high with rated-load it seems to be a good way to convert electric energy into mechanical energy for industrial and domestic applications for a predictable future. An economy in energy consumption by loss reduction is the goal of this study. The induction motors as normal operate with constant flux in the air-gap and, hence with almost constant losses in the core. The use of a voltage gradador circuit in series with the voltage source applied to the motor for flux reduction in the air-gap by reduction of the voltage when the load do not need full-flux is this study proposal. Hence, with applied voltage reduction, to keep the operational torque, the motor rotation decreases or the slip increases to an optimum value to reduce the total core losses and increase the efficiency. As a rule, the induction motor, by the dip characteristic of the torque x speed curve in the region near the nominal speed, the torque changes much more then the speed. For efficient operation, the applied voltage should be a function of the load. It is the goal or aim of this work to study a device which, when placed in series with the power input of an alternating current induction motor, will produce a reduction in power normally provided to the motor when operated in either a condition where motor loading is less than a rated load. An analysis of voltage ideal sine wave supply reduction applied by an autotransformer with variable voltage is compared with the voltage reduction using a gradador circuit based on thyristors. The optimal voltage operation is the one that decrease the iron losses to minimum, for partial-load that do not need full-flux in the air-gap as when the full voltage is applied. Limitations in the process are investigated and will be showed.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Power and load factor"

1

Dundulis, Gintautas. Deterministic and probabilistic structural integrity analysis of the reinforced concrete structures. New York: Begell House, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Bhavsar, Ketan J. Power factor. Ahmedabad: Physical Research Laboratory, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Bhavsar, Ketan J. Power factor. Ahmedabad: Physical Research Laboratory, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Bhavsar, Ketan J. Power factor. Ahmedabad: Physical Research Laboratory, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Load bearing system. Basel: Birkhäuser, 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Lesieutre, Bernard. Load modeling transmission research. Sacramento, Califofornia]: [California Energy Commission], 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Willis, H. Lee. Spatial electric load forecasting. 2nd ed. New York: Marcel Dekker, 2002.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Schrock, Derek. Load shape development. Tulsa, Okla: PennWell Books, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Appelbaum, Joseph. Common source/multiple load vs. separate source/individual load photovoltaic system. [Washington, D.C.]: National Aeronautics and Space Administration, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

G, Wassef Wagdy, Nowak Andrzej S, National Cooperative Highway Research Program, National Research Council (U.S.). Transportation Research Board, American Association of State Highway and Transportation Officials, and United States. Federal Highway Administration, eds. A comparison of AASHTO bridge load rating methods. Washington, D.C: Transportation Research Board, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Power and load factor"

1

Rauf, S. Bobby. "Demand, Load Factor, Service Factor and Electrical Power Bill Computation." In Electrical Engineering for Non-Electrical Engineers, 195–208. 2nd ed. Second edition. | Lilburn, GA : The Fairmont Press, Inc., [2016]: River Publishers, 2021. http://dx.doi.org/10.1201/9781003152033-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Zhu, Yue. "Factors Affecting Load Model Parameter Ranking." In Power System Loads and Power System Stability, 109–28. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37786-1_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Tanriöven, Muğdeşem, Celal Kocatepe, and Adem Ünal. "Power factor correction in power systems having load asymmetry by using fuzzy logic controller." In Computational Intelligence Theory and Applications, 529–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/3-540-62868-1_146.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Su, Xin, Xin-hua Jiang, Shun-miao Zhang, and Ming-long Chen. "LSTM Power Mid-Term Power Load Forecasting with Meteorological Factors." In Advances in Smart Vehicular Technology, Transportation, Communication and Applications, 96–103. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-04585-2_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Spitas, C., V. Spitas, and M. Rajabalinejad. "Dynamical Simulation and Calculation of the Load Factor of Spur Gears with Indexing Errors and Profile Modifications for Optimal Gear Design." In Power Transmissions, 183–96. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6558-0_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Bharath Kumar, T., and M. Ramamoorty. "Effect of Loss of Load Probability Due to Power Transformer Derating Factor on Smart Grid Reliability." In Lecture Notes in Electrical Engineering, 25–33. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-7511-2_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Stratakis, D. I., and T. M. Papazoglou. "Critical Factors in Load Forecasting for the Autonomous Electric Power System of Crete." In Advances in Intelligent Systems, 515–26. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4840-5_46.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Alam, Kamran, Lalita Sharma, and Namarta Chopra. "Power Factor Correction for Single-Phase Domestic Loads Using Microcontroller and Triac." In Lecture Notes in Networks and Systems, 91–103. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8218-9_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Weik, Martin H. "load factor." In Computer Science and Communications Dictionary, 911. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_10423.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Puranik, Prajwal, M. Ashwini Kumari, K. Suryanarayana, and K. Krishna Prasad. "Control Loop Design of DC–AC Power Supply with High Crest Factor Nonlinear Loads." In Lecture Notes in Electrical Engineering, 503–18. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0626-0_39.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Power and load factor"

1

Besselmann, Thomas, Pieder Jorg, and Sture Van de Moortel. "Power Factor Improvements for Load Commutated Inverters." In 2018 IEEE Conference on Control Technology and Applications (CCTA). IEEE, 2018. http://dx.doi.org/10.1109/ccta.2018.8511428.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Mortazavi, Hashem, Hasan Mehrjerdi, and Maarouf Saad. "A Modified Load Encroachment Technique for Power Factor Monitoring." In 2018 IEEE Power & Energy Society General Meeting (PESGM). IEEE, 2018. http://dx.doi.org/10.1109/pesgm.2018.8586366.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Moradi, Arash, Seyed M. Madani, and Ramtin Sadeghi. "Impact of load power factor on sympathetic inrush current." In 2016 24th Iranian Conference on Electrical Engineering (ICEE). IEEE, 2016. http://dx.doi.org/10.1109/iraniancee.2016.7585743.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Sharaf and Huang. "Nonlinear load reactive compensation and power factor correction using modulated power filter." In Proceedings of Canadian Conference on Electrical and Computer Engineering CCECE-94. IEEE, 1994. http://dx.doi.org/10.1109/ccece.1994.405667.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Liu, Xiyu, and Pengyong Qi. "Impact of Leading Power Factor Load on Power Supply System for ICT." In 2018 IEEE International Telecommunications Energy Conference (INTELEC). IEEE, 2018. http://dx.doi.org/10.1109/intlec.2018.8612388.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Karimi-Ghartemani, Masoud, S. Ali Khajehoddin, and A. Bakhshai. "Is the Unity Power Factor Realizable at the Load Terminals?" In 2008 IEEE Power & Energy Society General Meeting. IEEE, 2008. http://dx.doi.org/10.1109/pes.2008.4596034.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Hossan, Md Shakawat, H. M. Mesbah Maruf, and Badrul Chowdhury. "Comparison of the ZIP load model and the exponential load model for CVR factor evaluation." In 2017 IEEE Power & Energy Society General Meeting (PESGM). IEEE, 2017. http://dx.doi.org/10.1109/pesgm.2017.8274490.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Peng, Wenxin, Yahia Baghzouz, and Salim Haddad. "Local load power factor correction by grid-interactive PV inverters." In 2013 IEEE Grenoble PowerTech. IEEE, 2013. http://dx.doi.org/10.1109/ptc.2013.6652412.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Petrea, Costel, and Mihai Lucanu. "Bridgeless Power Factor Correction Converter Working at High Load Variations." In 2007 International Symposium on Signals, Circuits and Systems. IEEE, 2007. http://dx.doi.org/10.1109/isscs.2007.4292802.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Nemani, Sagar Venkateshwar, Divyanshu Shahi, and I. K. Vibhav. "Design and Implementation of Digital Energy Meters with Power Factor Measurement and Load Indication Feature." In 2018 IEEE 8th Power India International Conference (PIICON). IEEE, 2018. http://dx.doi.org/10.1109/poweri.2018.8704382.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Power and load factor"

1

Ishaque, Mohammed. A new method for calculating the economic benefits of varying degrees of power factor correction for industrial plant loads. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.6206.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sotelino, Elisa, Judy Liu, and Wonseok Chung. Simplified Load Distribution Factor for Use in LRFD Design. West Lafayette, IN: Purdue University, 2004. http://dx.doi.org/10.5703/1288284313314.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Evans, James W., and David W. Green. Censoring Data for Resistance Factor Calculations in Load and Resistance Factor Design: A Preliminary Study. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2007. http://dx.doi.org/10.2737/fpl-rn-304.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Electrotek Concepts. Industrial Power Factor Analysis Guidebook. Office of Scientific and Technical Information (OSTI), March 1995. http://dx.doi.org/10.2172/654078.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Neubauer, Michael, Alan Dudas, and Anatoly Krasnykh. High power s-band vacuum load. Office of Scientific and Technical Information (OSTI), December 2016. http://dx.doi.org/10.2172/1337611.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Hsu, J. S. Instantaneous reactive power and power factor of instantaneous phasors. Office of Scientific and Technical Information (OSTI), February 1998. http://dx.doi.org/10.2172/654174.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Farkas, Z. D. TE_01 High Power Disk Loaded Guide Load. Office of Scientific and Technical Information (OSTI), June 2005. http://dx.doi.org/10.2172/890467.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Trudnowski, D. J., J. M. Johnson, and P. Whitney. Power system very short-term load prediction. Office of Scientific and Technical Information (OSTI), February 1997. http://dx.doi.org/10.2172/552797.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

NAVAL SEA SYSTEMS COMMAND WASHINGTON DC. Electric Power Load Analysis (EPLA) for Surface Ships. Fort Belvoir, VA: Defense Technical Information Center, September 2012. http://dx.doi.org/10.21236/ada568950.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Sorooshian, Kianfar. Load flow and contingency analysis in power systems. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.3310.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Power and load factor' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography