Thematische Bibliographien / Power generation circuit

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Auswahl der wissenschaftlichen Literatur zum Thema „Power generation circuit“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 12. Februar 2022

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Zeitschriftenartikel zum Thema "Power generation circuit"

Sangwaranatee, N., T. Wongkampha, E. Kaseam, N. W. Sangwaranatee und W. Mekhum. „Temperature Difference of Thermoelectric Module on PIC-Microcontroller“. Advanced Materials Research 979 (Juni 2014): 417–20. http://dx.doi.org/10.4028/www.scientific.net/amr.979.417.

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This research is the study of electric power generated by the temperature difference below 100 °C of thermoelectric effect (cooling devices), which gets power from direct current and the electromotive force from thermoelectric module. In this research, a testing kit was designed to collect the output of temperature difference on the thermoelectric device, and compared the level of electric power of various modules in 2 different circuits; series and parallel. The result of the study showed that the higher differential temperature increased the value of electricity generation. Also, the electrical connection of thermoelectric module had an effect on power generating. When using 2 modules for each circuit, the series circuit generated more power than the parallel circuit.

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Xiang-jie, Niu, und Li Hua. „Lower Power Design for UHF RF CMOS Circuits Based on the Power Consumption Acuity“. Mathematical Problems in Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/512398.

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Excessive energy consumption of UHF tag is the bottleneck of energy saving in its wide range of applications. To address this issue, a lower power design for UHF RF CMOS circuits based on power consumption acuity is proposed in this paper. Through in-depth analysis of the static and dynamic power generation principle of UHF RF circuits in the work, the power consumption acuity can be calculated by using the correlation of circuit power and input vector. Subsequently, under the guide of this acuity, the UHF RF CMOS circuits with better energy saving can be designed. Furthermore, according to the performance indicators of EPC CIG2 UHF RFID in UHF identification, the corresponding circuit is designed and implemented. The test results show that the design of UHF RF circuit based on the acuity of power consumption can reduce 35%–40% power consumption.

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Begam, V. M. Thoulath, und S. Baulkani. „Ring Counter Based ATPG for Low Transition Test Pattern Generation“. Scientific World Journal 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/729165.

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In test mode test patterns are applied in random fashion to the circuit under circuit. This increases switching transition between the consecutive test patterns and thereby increases dynamic power dissipation. The proposed ring counter based ATPG reduces vertical switching transitions by inserting test vectors only between the less correlative test patterns. This paper presents the RC-ATPG with an external circuit. The external circuit consists of XOR gates, full adders, and multiplexers. First the total number of transitions between the consecutive test patterns is determined. If it is more, then the external circuit generates and inserts test vectors in between the two test patterns. Test vector insertion increases the correlation between the test patterns and reduces dynamic power dissipation. The results prove that the test patterns generated by the proposed ATPG have fewer transitions than the conventional ATPG. Experimental results based on ISCAS’85 and ISCAS’89 benchmark circuits show 38.5% reduction in the average power and 50% reduction in the peak power attained during testing with a small size decoding logic.

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Zeng, Xian Tao, und Qian Hua Ren. „Power Generation System by Vehicle on the Downhill of Expressway“. Advanced Materials Research 724-725 (August 2013): 1361–65. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.1361.

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In this paper, a method of magnetoelectricity power generation system for vehicle on the downhill of expressways is proposed. This system is a clean energy system that can be reused. Its structure includes car magnetic poles, magnetic poles imbedded in road surface, closed circuit imbedded in road surface, rectifier, inverter and storage battery. Multi-unit magnetic poles and closed circuits imbedded in the road surface are used in this invention, so when the car poles move with the running down of cars on downhill, magnetic flow in closed circuits will change to produce a technique of group control power generation. From the simulated system in the test, it can be seen that it is efficient and effective in generating power.

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Sakano, Takumi, Zhen Qiang Song, Kazuhiro Ohyama, Shijie Zhu, Mikio Waki und Seiki A. Chiba. „Simulation of a Self-Excited Power Generation System for Dielectric Elastomer Generation“. Key Engineering Materials 804 (Mai 2019): 41–45. http://dx.doi.org/10.4028/www.scientific.net/kem.804.41.

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In recent years, global warming is a serious international problem. We focused on dielectric elastomer power generation to solve the problem. The dielectric elastomer generation has characteristics such as compactness and flexibility. The dielectric elastomer generation can harvest electric energy from renewable energy sources such as sea wave, wind, and human motion. However, the dielectric elastomer generation has a weakness dependent on an external power supply. In this paper, we proposed a self-excited dielectric elastomer generation circuit using piezoelectric elements. As a circuit verification method, circuit simulations are performed using MATLAB / Simulink, and the circuit behavior is confirmed from the results. From results, it is considered that dielectric elastomer generation can be performed without using the external power supply.

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Weikle, R. M., T. W. Crowe und E. L. Kollberg. „Multiplier and Harmonic Generator Technologies for Terahertz Applications“. International Journal of High Speed Electronics and Systems 13, Nr. 02 (Juni 2003): 429–56. http://dx.doi.org/10.1142/s012915640300179x.

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Harmonic generation based on frequency multipliers has proven to be the most successful and widely used solid-state technology for generating power at submillimeter wavelengths. Over the last several years, the development of new device technologies, implementation of innovative circuits, and application of advanced integrated-circuit processing techniques to frequency multiplier design have resulted in unprecedented levels of performance throughout the submillimeter-wave frequency band. This paper reviews the technological innovations, device options, circuit architectures, and fabrication technologies that have made harmonic generation such a successful approach to source development in the submillimeter spectrum.

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Sekiguchi, Takaya, und Toshihisa Shimizu. „Study on Photovoltaic Power Generation System with Power Decoupling Type Generation Control Circuit“. IEEJ Transactions on Industry Applications 139, Nr. 8 (01.08.2019): 761–62. http://dx.doi.org/10.1541/ieejias.139.761.

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Pan, Zhong Liang, und Ling Chen. „Low Power Test Pattern Design for VLSI Circuits Using Incorporate Pseudorandom and Deterministic Approach“. Solid State Phenomena 181-182 (November 2011): 229–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.181-182.229.

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The circuits should be tested extensively during the production process, the power consumption in a circuit during test mode can be higher than that the consumption during normal operation mode. The circuits are usually designed for normal operation mode, which makes it important to consider power consumption during test mode, otherwise the higher power consumption during test mode may cause the circuits being damaged. In this paper, a new approach for the test pattern design of VLSI circuits is presented, the approach defines the weight values of primary inputs of circuits, makes use of both circuit structure information and pseudorandom test generation to produce the test patterns, such that the circuit has lower power consumption when the test patterns are applied to the circuit primary inputs. The experimental results show the approach in this paper can get significant power consumption reduction compared with conventional random test algorithm.

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LEHMANN, TORSTEN, HOSUNG CHUN und YUANYUAN YANG. „POWER SAVING CIRCUIT DESIGN TECHNIQUES FOR IMPLANTABLE NEURO-STIMULATORS“. Journal of Circuits, Systems and Computers 21, Nr. 06 (Oktober 2012): 1240016. http://dx.doi.org/10.1142/s0218126612400166.

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Keeping power consumption low in implantable neuro-stimulators such as Cochlear Implants or Vision Prostheses is one of the major design challenges in their circuit design. Usually electrode impedance and stimulation currents required to elicit physiological responses mandates the use of large stimulation voltages, again dictating the use of high-voltage integrated circuit technologies. Power consumption in the stimulating circuits and associated supply generation circuits are the major contributors to overall system power dissipation. In this paper we present circuit design techniques that address power consumption in both stimulating circuits and power supply circuits. First, our power supply design approach is to recycle currents between the two low-voltage power supply needed for the stimulating circuits, whereby power consumption in these circuits can be close to halved. Second, our stimulating circuits design approach is to use very small quiescent currents, fast turn-on time and pre-stimulating dynamic calibration which allow the delivery of charge balanced bi-phasic stimulation pulses with very good power efficiency. A variation of this include passive charge recovery for further power reduction. In combination, significant implant power consumption reduction is achieved.

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Kumar Motamarri, Hemanth, und B. Leela Kumari. „On-chip Generation of Functional Tests with Reduced Delay and Power“. Bulletin of Electrical Engineering and Informatics 6, Nr. 1 (01.03.2017): 36–46. http://dx.doi.org/10.11591/eei.v6i1.570.

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This paper describes different methods on-chip test generation method for functional tests. The hardware was based on application of primary input sequences in order to allow the circuit to produce reachable states. Random primary input sequences were modeled to avoid repeated synchronization and thus yields varied sets of reachable states by implementing a decoder in between circuit and LFSR. The on-chip generation of functional tests require simple hardware and achieved high transition fault coverage for testable circuits. Further, power and delay can be reduced by using Bit Swapping LFSR (BS-LFSR). This technique yields less number of transitions for all pattern generation. Bit-swapping (BS) technique is less complex and more reliable to hardware miscommunications.

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Dissertationen zum Thema "Power generation circuit"

Krishnamurthy, Smitha. „SOLAR AND FUEL CELL CIRCUIT MODELING, ANALYSIS AND INTEGRATIONS WITH POWER CONVERSION CIRCUITS FOR DISTRIBUTED GENERATION“. Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3501.

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Renewable energy is considered to be one of the most promising alternatives for the growing energy demand in response to depletion of fossil fuels and undesired global warming issue. With such perspective, Solar Cells and Fuel Cells are most viable, environmentally sound, and sustainable energy sources for power generation. Solar and Fuel cells have created great interests in modern applications including distributed energy generation to provide clean energy. The purpose of this thesis was to perform a detailed analysis and modeling of Solar and Fuel cells using Cadence SPICE, and to investigate dynamic interactions between the modules and power conversion circuits. Equivalent electronic static and dynamic models for Solar and Fuel Cells, their electrical characteristics, and typical power loss mechanisms associated with them are demonstrated with simulation results. Power conversion circuits for integration with the dynamic models of these renewable low voltage sources are specifically chosen to boost and regulate the input low dc voltage from the modules. The scope of this work was to analyze and model solar and fuel cells to study their terminal characteristics, power loss mechanisms, modules and their dynamics when interfaced with power converters, which would lead to better understanding of these renewable sources in power applications.
M.S.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering MSEE

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Kim, Jina. „Area and Power Conscious Rake Receiver Design for Third Generation WCDMA Systems“. Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/30972.

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A rake receiver, which resolves multipath signals corrupted by a fading channel, is the most complex and power consuming block of a modem chip. Therefore, it is essential to design a rake receiver be efficient in hardware and power. We investigated a design of a rake receiver for the WCDMA (Wideband Code Division Multiple Access) system, which is a third generation wireless communication system. Our rake receiver design is targeted for mobile units, in which low-power consumption is highly important. We made judicious judgments throughout our design process to reduce the overall circuit complexity by trading with the performance. The reduction of the circuit complexity results in low power dissipation for our rake receiver. As the first step in the design of a rake receiver, we generated a software prototype in MATLAB. The prototype included a transmitter and a multipath Rayleigh fading channel, as well as a rake receiver with four fingers. Using the software prototype, we verified the functionality of all blocks of our rake receiver, estimated the performance in terms of bit error rate, and investigated trade-offs between hardware complexity and performance. After the verification and design trade-offs were completed, we manually developed a rake receiver at the RT (Register Transfer) level in VHDL. We proposed and incorporated several schemes in the RT level design to enhance the performance of our rake receiver. As the final step, the RT level design was synthesized to gate level circuits targeting TSMC 0.18 mm CMOS technology under the supply voltage of 1.8 V. We estimated the performance of our rake receiver in area and power dissipation. Our experimental results indicate that the total power dissipation for our rake receiver is 56 mW and the equivalent NAND2 circuit complexity is 983,482. We believe that the performance of our rake receiver is quite satisfactory.
Master of Science

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Afifi, Sara Nader. „Impact of hybrid distributed generation allocation on short circuit currents in distribution systems“. Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/15195.

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The rapid development in renewable generation technologies and flexible distribution networks requires current infrastructure to be modified and developed to adapt high penetration levels of distributed generation. Existing distribution networks were not initially designed and anticipated to accommodate generators on large scale. Short circuit studies ensure the effectiveness of protection equipment settings and coordination is maintained in case of short circuit, despite any additional distributed generation is connected to the distribution network. This research aims to study and compare the different network fault situations for wind energy systems with induction generators, photovoltaic energy systems, and diesel generators connected to distribution networks. The simulation study will be conducted on the existing IEEE case study systems including 13 bus and 30 bus distribution test systems, using ETAP software. Short circuit analysis will be performed twice to include the ANSI/IEEE and the IEC methods for short circuit currents calculation. Simulated results showed that the wind energy systems have significant impact on the short circuit currents, whereas the photovoltaic energy systems are found to have inconsequential effect. The most moderate solution is found to be a distributed generation mix.

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Wang, Shen. „Design and Analysis of a Low-Power Low-Voltage Quadrature LO Generation Circuit for Wireless Applications“. Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/39301.

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The competitive market of wireless communication devices demands low power and low cost RF solutions. A quadrature local oscillator (LO) is an essential building block for most transceivers. As the CMOS technology scales deeper into the nanometer regime, design of a low-power low-voltage quadrature LO still poses a challenge for RF designers. This dissertation investigates a new quadrature LO topology featuring a transformer-based voltage controlled oscillator (VCO) stacked with a divide-by-two for low-power low-voltage wireless applications. The transformer-based VCO core adopts the Armstrong VCO configuration to mitigate the small voltage headroom and the noise coupling. The LO operating conditions, including the start-up condition, the oscillation frequency, the voltage swing and the current consumption are derived based upon a linearized small-signal model. Both linear time-invariant (LTI) and linear time-variant (LTV) models are utilized to analyze the phase noise of the proposed LO. The results indicate that the quality factor of the primary coil and the mutual inductance between the primary and the secondary coils play an important role in the trade-off between power and noise. The guidelines for determining the parameters of a transformer are developed. The proposed LO was fabricated in 65 nm CMOS technology and its die size is about 0.28 mm2. The measurement results show that the LO can work at 1 V supply voltage, and its operation is robust to process and temperature variations. In high linearity mode, the LO consumes about 2.6 mW of power typically, and the measured phase noise is -140.3 dBc/Hz at 10 MHz offset frequency. The LO frequency is tunable from 1.35 GHz to 1.75 GHz through a combination of a varactor and an 8-bit switched capacitor bank. The proposed LO compares favorably to the existing reported LOs in terms of the figure of merit (FoM). More importantly, high start-up gain, low power consumption and low voltage operation are achieved simultaneously in the proposed topology. However, it also leads to higher design complexity. The contributions of this work can be summarized as 1) proposal of a new quadrature LO topology that is suitable for low-power low-voltage wireless applications, 2) an in-depth circuit analysis as well as design method development, 3) implementation of a fully integrated LO in 65 nm CMOS technology for GPS applications, 4) demonstration of high performance for the design through measurement results. The possible future improvements include the transformer optimization and the method of circuit analysis.
Ph. D.

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Dam, Quang Binh. „Operating strategies to preserve the adequacy of power systems circuit breakers“. Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28232.

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Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Meliopoulos, A. P. Sakis; Committee Member: Divan, Deepakraj M.; Committee Member: Harley, Ronald G.; Committee Member: Johnson, Ellis L.; Committee Member: Taylor, David G.

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Fradinho, Bastos Ivan. „Marketing Introduction Plan for the New Generation of Sustainable Circuit Breakers LTA 420 kV : A real-life case for implementation at Hitachi ABB Power Grids“. Thesis, KTH, Kemiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297294.

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En strömbrytare är en säkerhetsanordning som är utformad för att bryta strömmen om ett problem uppstår. Det finns ett flertal olika typer av brytare beroende vilket spänningsområde som avses. Brytare för lågspänning används för hushållsapparater, medan högspänningstyper används för överföring av spänning i elnätet. Högspänningsbrytare använder idag svavelhexafluorid (SF6)-gas, som ett isolerande medium för att släcka den elektriska ljusbåge som bildas när strömmen bryts. SF6 är dock problematiskt för miljön, då dess globala uppvärmningspotential (GWP) är 23 500 gånger högre jämfört med koldioxid (CO2). Företaget Hitachi ABB Power Grids har utvecklat AirPlus™-tekniken som ersätter SF6-gasen med en koldioxidbaserad gasblandning. Examensarbetet fokuserade på att utvärdera möjligheten att minska användningen av SF6 genom AirPlus™-tekniken och hur tekniken skulle kunna en introduceras på marknaden. Slutligen så utvecklades en strategi för hur detta skulle kunna ske. Studien innefattar den bakomliggande informationsinhämtningen och analysen av data, marknadsutvärdering och utvecklingen av marknadsstrategin. Detta utfördes genom att utvärdera AirPlus™-tekniken och dess konkurrenter, samt genom en kvalitativ och kvantitativ analys av implementeringen av LTA 420 kV-brytaren på marknaden. Sammanfattningsvis så visar studien att marknadsintroduktionen av strömbrytaren LTA 420 kV är genomförbar. Även om koldioxid tekniskt inte har samma prestanda som SF6, är tekniken fortfarande bra och ger starka kundfördelar: GWP minskar med över 99,9%, användningen överensstämmer med miljöregler, den ger lägre ägandekostnader, färre kontroller, lägre kostnad för hantering av koldioxidgasen, och fungerar väl vid extremt låga temperaturer. De viktigaste utmaningarna för Hitachi ABB Power Grids relaterar till konkurrensen på marknaden. Det är därför tillrådligt att företaget arbetar med en effektiv marknadsintroduktion för att säkerställa en stor marknadsandel.
A circuit breaker is a safety device designed to interrupt power if a problem is detected. There are several kinds of circuit breakers for different applications. Low-voltage circuit breakers are used for household appliances, while high-voltage types are used for transmission networks. High-voltage circuit breakers use sulfur hexafluoride (SF6) gas as an insulating medium, which extinguishes the electric arc that is formed when power is cut. However, it is a huge hazard for the environment, as its global warming potential (GWP) is 23,500 times higher than that of CO2 gas. The company Hitachi ABB Power Grids developed the AirPlus™ technology, which replaces the SF6 gas with a carbon dioxide (CO2) based gas mixture. The presented degree project has evaluated the feasibility of reducing the use of SF6 through the AirPlus™ technology and then developed a strategy for the company Hitachi ABB Power Grids for the market introduction of the eco-efficient LTA 420 kV circuit breaker. This study covers the background research, market evaluation, and market strategy. It was done through research about the AirPlus™ technology and its competitors, so as qualitative and quantitative analysis of the LTA 420 kV circuit breaker implementation in the market. In conclusion, the study shows that the market introduction of the LTA 420 kV circuit breaker is feasible. Although CO2 is not as good an insulation medium as SF6, it is still good and presents strong customer benefits: GWP reduced by over 99.9%, compliance with new regulations, lower cost of ownership, fewer regulatory controls, reduced cost of handling the gas, and well-functioning at extremely low temperatures. The main concerns for Hitachi ABB Power Grids are related to market competition. Thus, it is advisable that the company works on an effective market introduction to assure a large market share.

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Petean, Daniel. „Metodologia para avaliação da influência de geradores distribuídos nos níveis de curto-circuito em sistemas de distribuição de energia“. Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-05082015-105752/.

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A instalação de geração distribuída nas redes de distribuição e de subtransmissão de energia elétrica tem apresentado significativo crescimento em âmbito mundial, impulsionada pelos benefícios que pode proporcionar aos sistemas elétricos, pela necessidade de diversificação da matriz energética dos países, pela desregulamentação do setor de energia elétrica em diversos países e pela necessidade de gerar energia elétrica de forma sustentável. No entanto, para que os geradores distribuídos possam de fato beneficiar a operação das redes elétricas, seus impactos técnicos devem ser cuidadosamente estudados, sobretudo em redes de distribuição, as quais foram inicialmente planejadas para operar com fluxo de potência unidirecional. Dentre esses impactos, destaca-se a elevação do nível de curto-circuito da rede, pois correntes de curto-circuito com valores elevados podem causar violação das capacidades dos equipamentos em suportar os esforços térmicos e dinâmicos e também provocar a perda da coordenação entre os dispositivos de proteção contra sobrecorrente. Neste contexto, este trabalho analisa a influência de geradores distribuídos baseados em inversores na corrente de curto-circuito trifásica em um sistema de distribuição de energia, e sobretudo, comprova que sua contribuição no valor da corrente de falta não supera o dobro de sua corrente nominal. Além disso, com base nesta comprovação, apresenta duas estratégias para inserção desse tipo de gerador nos cálculos de curto-circuito de um sistema de distribuição de energia elétrica. As duas estratégias apresentam resultados satisfatórios, utilizam conceitos básicos de circuitos elétricos, independem de dados minuciosos dos inversores e são validadas através de aplicações numéricas com resultados confrontados aos obtidos das simulações.
The installation of distributed generation in distribution and subtransmission systems has shown significant growth worldwide, driven by the benefits it can provide to electrical systems, the need to diversify the energy sources, deregulation of the electricity industry in several countries and the need to generate electricity in a sustainable manner. However, in order to evaluate if distributed generators benefit the operation of power networks, their technical impacts should be carefully studied, especially in distribution networks, which were originally designed to operate with unidirectional power flow. Among the aforementioned impacts, there is the increase of the short circuit level in the distribution network, since high short-circuit currents may exceed the capabilities of equipment to support the dynamic and thermal stresses and also cause loss of coordination between the overcurrent protection devices. Within this context, this thesis analyzes the influence of inverter based distributed generators on three-phase short circuit currents in a power distribution systems. Especially it confirms that the contribution to the fault current does not exceed twice its rated value. Furthermore, based on this issue, this work presents two strategies for the inclusion of this type of generator in short circuit calculations. Both strategies presented satisfactory results, use basic concepts of electrical circuits, they do not depend on detailed data from the inverters and the results are validated by using simulation results.

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Salomonsson, Daniel. „Modeling, Control and Protection of Low-Voltage DC Microgrids“. Doctoral thesis, Stockholm : Elektriska energisystem, Electric Power Systems, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4666.

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Silva, Rafael Schincariol da 1983. „Desempenho de geradores distribuídos durante curtos-circuitos considerando requisitos de suportabilidade a afundamentos de tensão = Distributed generators performance during short-circuits considering fault ride-through requirements“. [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259990.

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Orientador: Walmir de Freitas Filho
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-21T00:53:15Z (GMT). No. of bitstreams: 1 Silva_RafaelSchincariolda_M.pdf: 3440136 bytes, checksum: 042a03fcb6272566cfc1c79d07478e1c (MD5) Previous issue date: 2012
Resumo: O aumento da penetração de geradores em redes de distribuição de energia elétrica além de diversificar a matriz elétrica proporciona benefícios técnicos e econômicos. Contudo, também levanta preocupações relativas à confiabilidade no suprimento de energia elétrica. Para plantas eólicas conectadas na média e alta tensão são estabelecidos requisitos de "Fault Ride-Through" que determinam que os geradores devem permanecer conectados à rede durante perturbações com afundamentos de tensão e, em alguns casos, fornecer reativos para o reestabelecimento da tensão terminal. Porém, implementar tais requisitos para geradores na baixa tensão não é trivial. Na ocorrência de grandes perturbações os geradores distribuídos devem obrigatoriamente ser desconectados em casos de ilhamento, caso contrário a segurança de pessoas e equipamentos é colocada em risco e a qualidade de energia fornecida não é garantida. Ainda, durante curtos-circuitos os geradores contribuem para ao aumento das correntes de falta e os esquemas de proteção podem sofrer impactos na seletividade e coordenação. Por isso, para atender o requisito de "Fault Ride- Through" seria necessário além de manter os geradores conectados rever os esquemas de proteção de sobrecorrente, sendo necessários estudos dos impactos desta iniciativa e a análise do comportamento dos principais tipos de geradores distribuídos na ocorrência de curtos-circuitos. Nesta dissertação de mestrado, uma rede de distribuição com geradores distribuídos foi analisada através do estudo de sucessivas simulações de transitórios eletromagnéticos. O comportamento de três tipos de geradores distribuídos na ocorrência de curtos-circuitos foi investigado por meio de estudos de estabilidade, da análise das características de afundamentos de tensão e do suporte de reativos. Os geradores síncronos se mostraram com maior capacidade de suportarem faltas temporárias na rede. Os impactos do aumento das correntes de falta nas proteções contra sobrecorrente e da não desconexão do gerador do sistema ilhado também foram analisados. Os resultados mostraram que a presença de geradores distribuídos pode causar problemas na seletividade e na coordenação da proteção, alem de deteriorar o comportamento transitório de geradores ilhados
Abstract: The increase of distributed generation penetration in distribution systems not only helps to diversify the electrical matrix but also brings both technical and economic benefits. Yet, it also raises worries related to energy supply reliability. For wind power plants into the medium and high voltage networks there are the grid codes for "Fault Ride-Through" which stands that wind generators ought to ride a fault with voltage sag and, in some cases, provide reactive power for the terminal voltage restoration. However, implementing such requisites for low voltage connected generators is not a trivial task, as under great perturbations the distributed generators are required to be disconnected from the grid if an islanding situation occurs. Otherwise, people and equipment security would be at risk and the quality of the supplied power cannot be guaranteed. Besides, during short-circuits generators contribute to the increased fault currents along the grid and because of that the protection schemes should experience loss of selectivity and coordination. So, meeting the fault ride-through requirement demand a review of the anti-islanding schemes in order to permit generator islanding, as well as review the protection schemes to guarantee selectivity and coordination. Therefore, studies about the impacts of this initiative are necessary as well as the main generators behavior analysis under short-circuits. In this dissertation, a distribution network was analyzed through successive electromagnetic transient simulations. The behavior of three types of distributed generators under shortcircuits was investigated by stability studies, voltage sag characteristics and reactive power support. Synchronous generators showed to present the best capability to ride through temporary faults on the grid. The impacts on overcurrent protection of increased shortcircuit currents due to the distributed generators and impacts of not disconnecting the generators during islanding situations were also analyzed. The outcomes showed that keeping distributed generators connected might lead to problems on the protection selectivity and coordination and deteriorate the transient behavior of generators
Mestrado
Energia Eletrica
Mestre em Engenharia Elétrica

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Salgado, Danilo Augusto. „Uma abordagem paramétrica do impacto da geração distribuída sobre as correntes de curto-circuito e na proteção de redes de distribuição“. Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-20062016-083241/.

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Esta dissertação tem por propósito analisar os impactos da geração distribuída sobre as correntes de curto-circuito e sobre a proteção das redes de média tensão das concessionárias de distribuição de energia elétrica usando uma abordagem paramétrica. A principal motivação deste trabalho são os recentes incentivos regulatórios que estão fomentando a geração distribuída no Brasil. Contudo, as redes de distribuição convencionais foram projetadas para serem passivas e a introdução da geração poderá causar problemas de ordem técnica que ainda precisam ser resolvidos. Tais problemas foram pesquisados e aqueles relacionados com os impactos sobre as correntes de curto-circuito foram enfatizados. As normas técnicas das concessionárias também foram investigadas porque seus requisitos, como a ligação dos transformadores de acoplamento, influem nas correntes de curto-circuito. Para se calcular as correntes de curto-circuito, desenvolveu-se uma planilha eletrônica cujos resultados foram validados com programas comerciais de análise de redes elétricas. Esta ferramenta foi utilizada para demonstrar, através de exemplos, o impacto causado pela geração distribuída sobre as correntes de curto-circuito e, posteriormente, para realizar as análises paramétricas nas quais a influência de cada variável foi avaliada. A aplicação do método paramétrico permitiu o estudo de possíveis limites para a potência de um gerador distribuído em função dos impactos admissíveis, de seu ponto de conexão, de seus parâmetros elétricos e dos parâmetros elétricos da rede.
The purpose of this thesis is to analyse the impacts of distributed generation on short-circuit currents and protection of the distribution utilities medium voltage networks using a parametric approach. The new regulations that are promoting the distributed generation in Brazil are the main motivation for this work. However, the conventional distribution networks were designed to be passive; therefore the integration of generation may cause some technical problems yet to be solved. Such problems were researched and those related to the impacts on short-circuit currents were emphasized. The utilities technical standards were also explored as their requirements affect the short-circuit currents (e.g. the transformers connections). A spreadsheet was developed in order to calculated the short-circuit currents and it was validated comparing its results to those of a commercial network analysis software. This tool was used to expose the impacts of distributed generation on short-circuit currents through examples and also to carry out parametric analysis in which the influence of every variable was evaluated. The application of a parametric method made it possible to define the maximum installed capacity of a distributed generator as a function of the allowed limits to the impacts on the short-circuit currents, its point of coupling, its electrical parameters and the electrical parameters of the network.

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Bücher zum Thema "Power generation circuit"

Robbins, Allan. Circuit analysis: Theory and practice. Albany: Delmar Publishers, 1995.

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Wilhelm, Miller, Hrsg. Circuit analysis: Theory and practice. 2. Aufl. Albany, N.Y: Delmar, 2000.

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Wilhelm, Miller, Hrsg. Circuit analysis: Theory and practice. 3. Aufl. New York: Thomson/Delmar Learning, 2003.

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Wilhelm, Miller, Hrsg. Circuit analysis: Theory and practice. 4. Aufl. Clifton Park, NY: Thomson Delmar Learning, 2007.

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Benini, Luca. Dynamic power management: Design techniques and CAD tools. Boston: Kluwer, 1998.

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Baschirotto, Andrea, Pieter Harpe und Kofi A. A. Makinwa, Hrsg. Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-25267-0.

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Mezhiba, Andrey V. Power distribution networks in high speed integrated circuits. Boston, MA: Kluwer Academic Publishers, 2003.

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G, Friedman Eby, Hrsg. Power distribution networks in high speed integrated circuits. Boston: Kluwer Academic Publishers, 2004.

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Electical calculations and guidelines for generating stations and industrial plants. Boca Raton: Taylor & Francis, 2012.

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Arrillaga, J. AC-DC power systems analysis. London, UK: The Institution of Electrical Engineers, 1998.

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Buchteile zum Thema "Power generation circuit"

Thiyagarajan, V. „New Symmetric 9-Level Inverter Topology with Reduced Switch Count and Switching Pulse Generation Using Digital Logic Circuit“. In Recent Advances in Power Electronics and Drives, 249–57. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8586-9_23.

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Deb, Pratyusha Biswas, Susmita Das, Arnima Das, Ronojit Bose, Aritra Das und Maitreyi Ray Kanjilal. „Power Grid Generation with Tectonic Mechanism Wind Energy Resources“. In Computational Advancement in Communication Circuits and Systems, 103–9. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8687-9_10.

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Rohith, G., P. Dhanunjaya Rao, P. Prasanth, A. Lakshmi Deepika und R. Hari Gopalkrishna. „Designing a Low-Power Generator Circuit with Switching Theory for Power Reduction“. In Proceedings of 2nd International Conference on Micro-Electronics, Electromagnetics and Telecommunications, 575–82. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4280-5_60.

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Cochet, Martin, Guénolé Lallement, Fady Abouzeid und Philippe Roche. „Clock Generation and Distribution for Low-Power Digital Systems“. In Low-Power Circuits for Emerging Applications in Communications, Computing, and Sensing, 1–32. First edition. | Boca Raton : CRC Press / Taylor & Francis, [2018] | Series: Taylor and Francis series in devices, circuits, & systems: CRC Press, 2018. http://dx.doi.org/10.1201/9780429507564-1.

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Sasamal, Trailokya Nath, Ashutosh Kumar Singh und Umesh Ghanekar. „Design and Analysis of Ultra-Low Power QCA Parity Generator Circuit“. In Advances in Power Systems and Energy Management, 347–54. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4394-9_35.

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Abu-Siada, Ahmed, Mohammad A. S. Masoum, Yasser Alharbi, Farhad Shahnia und A. M. Shiddiq Yunus. „Superconducting Magnetic Energy Storage, a Promising FACTS Device for Wind Energy Conversion Systems“. In Recent Advances in Renewable Energy, 49–86. UAE: Bentham Science Publishers Ltd., 2017. http://dx.doi.org/10.2174/9781681085425117020004.

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The applications of FACTS devices have become popular in the last few decades. There are many types of FACTS devices that are currently used in power systems to improve system stability, power quality and the overall reliability of the power systems. Since the involvement of renewable energies based power plants such as wind and PV, problems related to power system stability and quality has become even more complex, therefore the deployment of FACTS devices has become a challenging task. In this chapter, a Superconducting Magnetic Energy Storage (SMES) Unit is applied to improve the performance of Doubly Fed Induction Generator (DFIG) based wind turbine during various disturbances such as voltage sag, short circuit faults and load variation, including problems related to internal faults within the DFIG converters.

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Zetterling, Carl-Mikael, Saleh Kargarrazi und Muhammad Shakir. „Wide Bandgap Integrated Circuits for High Power Management in Extreme Environments“. In Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits, 167–78. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25267-0_10.

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Wittmann, Juergen, Francesco Cannillo, Dan Ciomaga, Mihail Jefremow und Fabio Rigoni. „Highly Efficient Power Management in Wearables and IoT Devices“. In Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits, 125–42. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25267-0_8.

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Morini, Sergio, Davide Respigo und Martina Arosio. „Challenges in Driving New Generations of Power Switches for Motor Drive: A dV/dt Self-Adjusting Architecture for Superjunction Power Devices“. In Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits, 193–211. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25267-0_12.

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Yarlagadda, Venu, B. V. Sankar Ram und K. R. M. Rao. „Power System Generator and Voltage Stability Enhancement by the Hardware Circuit Implementation of 3-Ph Static Var Compensator (SVC)“. In Mobile Communication and Power Engineering, 465–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-35864-7_71.

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Konferenzberichte zum Thema "Power generation circuit"

Mokhberdoran, A., H. Leite, A. Carvalho und N. Silva. „A Review on HVDC Circuit Breakers“. In 3rd Renewable Power Generation Conference (RPG 2014). Institution of Engineering and Technology, 2014. http://dx.doi.org/10.1049/cp.2014.0859.

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Alderson, E. D., G. W. Scheper und A. Cohn. „Closed Circuit Steam Cooling in Gas Turbines“. In 1987 Joint Power Generation Conference: GT Papers. American Society of Mechanical Engineers, 1987. http://dx.doi.org/10.1115/87-jpgc-gt-1.

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In the continuing effort to achieve better specific power and higher cycle efficiencies, gas turbine designers have through the years sought higher and higher firing temperatures. A large part of this gain in firing temperatures has been achieved through cooling the turbine nozzles and buckets. In almost all cases the coolant, usually air, is discharged into the gas path after performing its cooling function. This approach entails the double penalties of causing mixing losses and of producing a dilution of the hot gas stream by admixture of the lower temperature coolant. This paper presents a new cooling concept, developed under a study contract for Electric Power Research Institute, wherein high pressure steam is used as the coolant in a closed circuit steam cooling (CCSC) system. This not only avoids the mixing and dilution losses in the gas turbine, but permits recovery of the heat picked up in the coolant by expansion in a steam turbine. With CCSC, Brayton-combined cycle thermal efficiencies of 54% are projected using current materials and technology. With development of specific technologies, an ultimate efficiency for the Brayton-combined cycle of 57% is foreseen. This paper also discusses the sensitivity of the cycle performance to the design parameters. Performance of this CCSC cycle is compared to that of an advanced air-cooled Brayton combined cycle.

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Sun, Bao Wen, und Yunxi Wu. „Main Circuit Parameters Design of DC operating Power Supply“. In Next Generation Computer and Information Technology 2015. Science & Engineering Research Support soCiety, 2015. http://dx.doi.org/10.14257/astl.2015.111.13.

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d'Alessandro, V., P. Guerriero, F. Di Napoli und S. Daliento. „A novel circuit model of PV cell for electrothermal simulations“. In 3rd Renewable Power Generation Conference (RPG 2014). Institution of Engineering and Technology, 2014. http://dx.doi.org/10.1049/cp.2014.0885.

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Ahmed, Sheeraz, Faizan Amir, S. Riaz-ul-Hasnain, Duri Shahwar und Saqib Jamil. „Electronic ballast circuit configurations for fluorescent lamps“. In 2015 Power Generation Systems and Renewable Energy Technologies (PGSRET). IEEE, 2015. http://dx.doi.org/10.1109/pgsret.2015.7312234.

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Feng Xu, Yi Lu, Jianhua Li, Qian Chen, Peng Qiu und Daozhuo Jiang. „Study on Reliability Improvement of Current-transferring Type HVDC Circuit Breaker“. In 8th Renewable Power Generation Conference (RPG 2019). Institution of Engineering and Technology, 2019. http://dx.doi.org/10.1049/cp.2019.0262.

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Hassan, Ali H., Mohamed A. ElBadry, Yehea Ismail und Hassan Mostafa. „A Low-Power Self-Startup Bandgap Circuit for Energy Efficient Applications“. In 2017 New Generation of CAS (NGCAS). IEEE, 2017. http://dx.doi.org/10.1109/ngcas.2017.21.

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Yichang Gao, Gang Yao und Lidan Zhou. „Current decoupling control under asymmetrical open-circuit faults of dual three-phase PMSG“. In 8th Renewable Power Generation Conference (RPG 2019). Institution of Engineering and Technology, 2019. http://dx.doi.org/10.1049/cp.2019.0377.

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Yang, Y., L. Gao, Y. B. Yuan, C. B. Su, Y. F. Gong und H. X. Wang. „Analysis and extration of comtrade based data in short-circuit fauit“. In International Conference on Renewable Power Generation (RPG 2015). Institution of Engineering and Technology, 2015. http://dx.doi.org/10.1049/cp.2015.0403.

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Juntai Cui, Li Zhang, Boyi Zhang und Keqiang Li. „Circuit theory-based method for power loss estimation in distribution systems with distributed generator“. In 8th Renewable Power Generation Conference (RPG 2019). Institution of Engineering and Technology, 2019. http://dx.doi.org/10.1049/cp.2019.0393.

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