Relevant bibliographies by topics / Transformerless

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

Academic literature on the topic 'Transformerless'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Transformerless"

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Kahawish Hassan, Turki, and Enaam Abdul Khaliq Ali. "TRANSFORMERLESS PHOTOVOLTAIC MICROINVERTER." Journal of Engineering and Sustainable Development 22, no. 02 (March 1, 2018): 41–55. http://dx.doi.org/10.31272/jeasd.2018.2.66.

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Schiebold, Christopher F. "Transformerless audio amplifier." Journal of the Acoustical Society of America 101, no. 1 (January 1997): 20. http://dx.doi.org/10.1121/1.418004.

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Bouzguenda, Mounir, Tarek Selmi, Adel Gastli, and Ahmed Masmoudi. "Microcontroller-based inverter topology integrated in PV systems." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 34, no. 1 (January 5, 2015): 132–50. http://dx.doi.org/10.1108/compel-10-2013-0330.

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Purpose – The purpose of this paper is to study the problem of the leakage currents in transformerless inverter topologies. It proposes a novel topology and how important the adopted control strategy on the power quality produced by the inverter. Design/methodology/approach – The paper presents an investigation of a novel transformerless inverter topology. It adopted a control strategy in which the DC source is disconnected from the inverter when the zero vectors of the control are applied. By using such control strategy, the electrical efficiency of the whole system was improved and the leakage current was significantly reduced. Findings – The paper provides a solution to minimize the leakage current in transformerless inverter topologies. Besides, the problem of zero-crossing distortions was totally eliminated. Research limitations/implications – Because of the high conversion ratio of the boost converter, the efficiency of the whole system needs to be enhanced. Practical implications – The paper includes the experimental results of the proposed topology which are in good match with the simulation results. Originality/value – This paper identifies a need to study the leakage current phenomena in transformerless inverter topologies.
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Li, B. H., S. S. Choi, and D. M. Vilathgamuwa. "Transformerless dynamic voltage restorer." IEE Proceedings - Generation, Transmission and Distribution 149, no. 3 (2002): 263. http://dx.doi.org/10.1049/ip-gtd:20020212.

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Koffler, R. "Transformer or transformerless UPS?" Power Engineer 17, no. 3 (2003): 34. http://dx.doi.org/10.1049/pe:20030310.

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Albalawi, Hani, and Sherif A. Zaid. "Performance Improvement of a Grid-Tied Neutral-Point-Clamped 3-φ Transformerless Inverter Using Model Predictive Control." Processes 7, no. 11 (November 15, 2019): 856. http://dx.doi.org/10.3390/pr7110856.

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Grid-connected photovoltaic (PV) systems are now a common part of the modern power network. A recent development in the topology of these systems is the use of transformerless inverters. Although they are compact, cheap, and efficient, transformerless inverters suffer from chronic leakage current. Various researches have been directed toward evolving their performance and diminishing leakage current. This paper introduces the application of a model predictive control (MPC) algorithm to govern and improve the performance of a grid-tied neutral-point-clamped (NPC) 3-φ transformerless inverter powered by a PV panel. The transformerless inverter was linked to the grid via an inductor/capacitor (LC) filter. The filter elements, as well as the internal impedance of the grid, were considered in the system model. The discrete model of the proposed system was determined, and the algorithm of the MPC controller was established. Matlab’s simulations for the proposed system, controlled by the MPC and the ordinary proportional–integral (PI) current controller with sinusoidal pulse width modulation (SPWM), were carried out. The simulation results showed that the MPC controller had the best performance for earth leakage current, total harmonic distortion (THD), and the grid current spectrum. Also, the efficiency of the system using the MPC was improved compared to that using a PI current controller with SPW modulation.
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Yang, Yongheng, Huai Wang, and Frede Blaabjerg. "Reliability Assessment of Transformerless PV Inverters considering Mission Profiles." International Journal of Photoenergy 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/968269.

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Due to the small volume and high efficiency, transformerless inverters have gained much popularity in grid-connected PV applications, where minimizing leakage current injection is mandatory. This can be achieved by either modifying the modulation schemes or adding extra power switching devices, resulting in an uneven distribution of the power losses on the switching devices. Consequently, the device thermal loading is redistributed and thus may alter the entire inverter reliability performance, especially under a long-term operation. In this consideration, this paper assesses the device reliability of three transformerless inverters under a yearly mission profile (i.e., solar irradiance and ambient temperature). The mission profile is translated to device thermal loading, which is used for lifetime prediction. Comparison results reveal the lifetime mismatches among the power switching devices operating under the same condition, which offers new thoughts for a robust design and a reliable operation of grid-connected transformerless PV inverters with high efficiency.
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Vithayathil, J. J., P. E. Bjorklund, and W. Mittlestadt. "DC systems with transformerless converters." IEEE Transactions on Power Delivery 10, no. 3 (July 1995): 1497–504. http://dx.doi.org/10.1109/61.400934.

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Park, Jae-Kyu, Jung-Min Kwon, Eung-Ho Kim, and Bong-Hwan Kwon. "High-Performance Transformerless Online UPS." IEEE Transactions on Industrial Electronics 55, no. 8 (August 2008): 2943–53. http://dx.doi.org/10.1109/tie.2008.918606.

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Daut, I., M. Irwanto, Y. M. Irwan, N. Gomesh, M. Adzri, and M. Fitra. "High Power Transformerless Photovoltaic Inverter." Energy Procedia 36 (2013): 465–72. http://dx.doi.org/10.1016/j.egypro.2013.07.052.

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Dissertations / Theses on the topic "Transformerless"

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Chen, Baifeng. "High-efficiency Transformerless PV Inverter Circuits." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56686.

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With worldwide growing demand for electric energy, there has been a great interest in exploring photovoltaic (PV) sources. For the PV generation system, the power converter is the most essential part for the efficiency and function performance. In recent years, there have been quite a few new transformerless PV inverters topologies, which eliminate the traditional line frequency transformers to achieve lower cost and higher efficiency, and maintain lower leakage current as well. With an overview of the state-of-the-art transformerless PV inverters, a new inverter technology is summarized in the Chapter 2, which is named V-NPC inverter technology. Based this V-NPC technology, a family of high efficiency transformerless inverters are proposed and detailly analyzed. The experimental results demonstrate the validity of V-NPC technology and high performance of the transformerless inverters. For the lower power level transformerless inverters, most of the innovative topologies try to use super junction metal oxide semiconductor field effect transistor(MOSFET) to boost efficiency, but these MOSFET based inverter topologies suffer from one or more of these drawbacks: MOSFET failure risk from body diode reverse recovery, increased conduction losses due to more devices, or low magnetics utilization. By splitting the conventional MOSFET based phase leg with an optimized inductor, Chapter 3 proposes a novel MOSFET based phase leg configuration to minimize these drawbacks. Based on the proposed phase leg configuration, a high efficiency single-phase MOSFET transformerless inverter is presented for the PV micro-inverter applications. The PWM modulation and circuit operation principle are then described. The common mode and differential mode voltage model is then presented and analyzed for circuit design. Experimental results of a 250 W hardware prototype are shown to demonstrate the merits of the proposed MOSFET based phase-le and the proposed transformerless inverter. New codes require PV inverters to provide system regulation and service to improve the distribution system stabilization. One obvious impact on PV inverters is that they now need to have reactive power generation capability. The Chapter 4 improves the MOFET based transformerless inverter in the Chapter 3 and proposed a novel pulse width modulation (PWM) method for reactive power generation. The ground loop voltage of this inverter under the proposed PWM method is also derived with common mode and differential mode circuit analyses, which indicate that high-frequency voltage component can be minimized with symmetrical design of inductors. A 250-W inverter hardware prototype has been designed and fabricated. Steady state and transient operating conditions are tested to demonstrate the validity of improved inverter and proposed PWM method for reactive power generation, high efficiency of the inverter circuit, and the high-frequency-free ground loop voltage. Besides the high efficiency inverter circuit, the grid connection function is also the essential part of the PV system. The Chapter 5 present the overall function blocks for a grid-connected PV inverter system. The current control and voltage control loop is then analyzed, modeled, and designed. The dynamic reactive power generation is also realized in the control system. The new PLL method for the grid frequency/voltage disturbance is also realized and demonstrate the validity of the detection and protection capability for the voltage/frequency disturbance. At last, a brief conclusion is given in the Chapter 6 about each work. After that, future works on device packaging, system integration, innovation on inverter circuit, and standard compliance are discussed.
Ph. D.
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Becker, Martin Gerhard. "Transformerless series dip/sag compensation with ultracapacitors." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16256.

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Thesis (MScIng)--University of Stellenbosch, 2004.
ENGLISH ABSTRACT: This thesis covers the development of a transformerless series dip compensator. Of all known power quality problems, voltage dips are the greatest reason for concern. Series injection dip compensators offer the advantage of only having to compensate for the decrease in supply voltage during a dip. This results in significant reduction in converter ratings and energy storage requirements. The aim of this thesis was to take up previous developments and combine them with new technologies to maximize their functionality. The new design was implemented with ultracapacitors to offer a maintenance-free device lifespan of 20 years. As they are very expensive, a new topology was introduced in this thesis to maximize their use so that they become viable for industry. Furthermore, a new method of daisy chaining switches was introduced to minimize costs involved in controlling them. A single-phase compensator, with this new topology and the new way of controlling switches, was designed and built according to specifications stated by Eskom. This ultracapacitor-based dip compensator was tested with a dip generator, developed by the University of Stellenbosch for different load currents. The experimental results confirmed simulations made with identical parameters. This thesis presents a reliable and cost effective solution for dip compensation.
AFRIKAANSE OPSOMMING: Hierdie tesis dek die ontwikkeling van ’n transformatorlose duik kompenseerder. Van al die bekende toevoerkwaliteit probleme wek duike in die spanning die meeste kommer. Serie-injeksie kompenseerders het die voordeel dat hulle net kompenseer vir die verlies in die toevoerspanning tydens die duik. Dit het ’n beduidende vermindering in die omsetterkenwaardes en energiestoorvereistes tot gevolg. Hierdie tesis mik om vorige soortgelyke ontwikkelings op te volg en te verbeter met nuwe tegnologie om die funktionliteit te maksimeer. Die ontwerp is geimplementeer met ultrakapasitore wat die onderhoudsvrye toestel ‘n leeftyd van 20 jaar toelaat. Omdat ultrakapasitore so duur is moes ‘n nuwe topologie onwikkel word om die gebruik van ultrakapasitore meer ekonomies aantreklik te maak. Daar is ook ‘n nuwe manier van skakelaar beheer ontwikkel wat toelaat dat baie skakelaars oor een optise veesel beheer kan word. ‘n Enkel fase dip kompensaeerder is toe onwikkel en gebou volgens Eskom se spesifikasies. Die ultrakapasitor gebaseerde omsetter is getoets met ‘n dip generator wat deur die Universiteit van Stellenbosch ontwikkel is. Die praktiese resultate bevestig die simulasies wat gedoen is met dieselfe parameters. Hierdie tesis lei tot ‘n betroubaare en ekonomiese oplossing vir duik kompensasie.
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Visser, Abraham Johannes. "Transformerless series dip/sag compensation with a multilevel cascaded inverter." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52592.

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Thesis (MScEng)--University of Stellenbosch, 2001.
ENGLISH ABSTRACT: This thesis covers the development of a multilevel cascaded inverter for the purpose of costeffective transformerless series dip compensation. Of all known power quality problems, voltage dips are the greatest reason for concern. Dips/sags occur more frequently than outages and therefore tend to be more costly for industry as modem technical equipment becomes all the more sensitive to the quality and reliability of supply. A number of devices already exist to compensate for this problem, but the cost of most of these systems does not always justify the financial losses they compensate for. All of these systems are using transformers and/or large filter components that contribute to the size, price and losses to quite a large extent. Series injection dip compensators offer the advantage of only having to compensate for the decrease in supply voltage during a dip. This results in a significant reduction in the converter ratings and energy storage requirements compared to conventional uninterruptible power supplies or shunt injection power quality devices. Existing inverter topologies, including multilevel inverters, were therefore studied and compared as possible solutions for cost-effective transformerless series dip compensation. On the basis of these considerations the multilevel cascaded inverter seems to be the most cost-effective option. The relatively low harmonic content of its unfiltered output also eliminates the need for a large output filter. A single-phase dip compensator, with this topology, was designed and built according to specifications stated by Eskom, the main utility in South Africa. Batteries as energy storage and automotive MOSFETs as switching components, proved to be most cost-effective options for the specified power ratings. Control algorithms for dip compensation with the multilevel inverter were also developed. Some of these algorithms are based on existing techniques, but two new algorithms were also developed to implement force commutation of the thyristors and to share the power dissipation in the dip compensator. Simulations indicated that these algorithms could be suitable and sufficient for their application. This dip compensator with its control algorithms was tested with a dip generator, developed at the University of Stellenbosch, for different types of loads. The experimental results confirmed the simulations and showed a very good performance for the specified conditions. An optimised design of this dip compensator will make it a cost-effective solution for dip compensation.
AFRIKAANSE OPSOMMING: Hierdie tesis dek die ontwikkeling van 'n multivlakwisselrigter, in kaskade, met koste-effektiewe transformatorlose duik kompensasie as mikpunt. Van al die bekende toevoerkwaliteit probleme wek duike in die spanning die meeste kommer. Duike kom meer gereeld voor as kragonderbrekings en neig daarom om 'n groter onkoste te wees vir die industrie soos wat moderne tegnologiese toerusting al hoe meer sensitief raak vir die kwaliteit en betroubaarheid van die toevoer. 'n Aantal toestelle wat vir hierdie probleem kompenseer bestaan reeds, maar die koste van hierdie stelsels regverdig nie altyd die finansiële verliese wat hulle moet elimineer nie. Al hierdie stelsels gebruik transformators en/of groot filter komponente wat grootliks bydra tot die grootte, prys en verliese van hierdie stelsels. Serie-injeksie kompenseerders het die voordeel dat hulle net kompenseer vir die verlies in die toevoerspanning tydens die duik. Dit het 'n beduidende vermindering in die omsetterkenwaardes en energiestoorvereistes tot gevolg in vergelyking met ononderbroke kragbronne (UPS) of newe-injeksie toevoerkwaliteit toestelle. Daarom IS bestaande wisselrigtertopologië, insluitende multivlakwisselrigters, bestudeer en vergelyk as moontlike oplossings vir koste-effektiewe serie duik-kompensasie. Van al hierdie moontlikhede lyk die multivlakwisselrigter, in kaskade, na die mees koste-effektiewe opsie. Die relatiewe lae harmoniese inhoud van sy ongefilterde uittree elimineer die behoefte aan 'n groot uittreefilter. 'n Enkelfase duik kompenseerder, met hierdie topologie, is ontwerp en gebou volgens die spesifikasies wat vasgestel is deur Eskom, die hoof elektriese kragvoorsiener in Suid-Afrika. Dit het geblyk dat batterye, en MOSFETte uit die motorbedryf, die mees koste-effektiewe opsies bied vir onderskeidelik die energiestoor en skakelkomponente. Beheeralgoritmes VIr duik kompensasie met die multivlakwisselrigter is ook ontwikkel. Sommige van hierdie algoritmes is gebaseer op bestaande tegnieke, maar twee nuwe algoritmes is ook ontwikkel vir die kommutering van die tiristors en die deling van die drywingsverkwisting in die duik kompenseerder. Simulasies dui aan dat hierdie algoritmes geskik en voldoende kan wees vir hulle toepassing. Hierdie duik kompenseerder met sy beheeralgoritmes is getoets vir verskillende tipes laste met 'n duikgenerator wat ontwikkel is by die Universiteit van Stellenbosch. Die eksperimentele resultate bevestig dit wat verkry is uit die simulasies en wys 'n goeie werkverrigting vir die gespesifiseerde kondisies. 'n Geoptimeerde ontwerp van hierdie duik kompenseerder sal dit 'n koste-effektiewe oplossing maak vir duik kompensasie.
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Sharma, Ronald. "Single-phase transformerless unipolar switched inverters for utility-connected photovoltaic applications." University of Southern Queensland, Faculty of Engineering and Surveying, 2007. http://eprints.usq.edu.au/archive/00004120/.

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[Abstract]: The disadvantages of using solar energy are its capital cost (which is about A$6/W), in comparison to that of conventional sources of energy (which is about A$1.80/W), and its conversion efficiency, which in commercially available Photovoltaic (PV) systems is less than 20%. Consequently, for utility connected PV generation to become a viable alternative energy source, its efficiency needs to be improved, its cost reduced, and the quality of power supplied by the inverters must meet stringent standards.This dissertation describes the research work carried out to optimise the conversion efficiency and to minimise the cost of a single-phase, hysteretic current controlunipolar switched inverter system, for use as an interface between solar panels and the grid network. The 1 kW (peak power) PV system being considered does not useenergy storage batteries and the inverter output is connected to the grid supply without the use of a power transformer. Improvements in the efficiency of such aninverter system often come at the expense of the quality of its output power and an increase in cost. However, in the proposed inverter system the harmonics of theoutput current has been improved without compromising its overall efficiency or its cost. An improvement in power quality has been achieved using a novel AC splitinductorfilter network that reduces electromagnetic interference, prevents unwanted operation of the inverter switches, attenuates switching frequency harmonics,minimises low frequency harmonics and provides an average value of the inverter output current necessary for the removal of DC offset currents.An improvement in inverter efficiency and a reduction in cost has been achieved by omitting the 50 Hz power transformer (transformerless) and by optimising theinverter current control strategies. In Australia, some power supply authorities permit transformerless PV inverters of less than 10 kW rating to be connected to their supply system. However, avoiding the use of transformers can lead to magnitudes of DC offset current outside the limits specified by Australian Standard 4777.2, 2005 being injected into the grid supply. In this project a new cost effective DC offset current controller that removes DC offset current from the output of the inverter has been realised. This result translates into two primary benefits; firstly, a saving of about20% in the cost of the power transformer and in the cost of providing additional solar panels to overcome transformer power losses, and secondly the DC offset controller can also be utilised in inverter applications where power transformers are used, to prevent distortion of the magnetising current.The novel design procedure proposed in this thesis for a current controller takes into account intentional and unintentional switching circuit delays, and yields higherefficiencies without sacrificing power quality or increasing the cost of the inverter system. The inclusion of the effect of circuit delays in the design procedure issignificant as it is shown that delay not only has an adverse effect on the performance of the current controller but also on the efficiency and the power quality of the inverter system.Of paramount importance for the successful completion of this project was the relationship between switching circuit delays and the level of low frequencyharmonics generated by unipolar switched inverters. Theoretical analysis is developed to show why circuit delays, inverter DC input voltage and the inductanceof the current loop, are responsible for low frequency harmonics in unipolar switched and not in bipolar switched inverters. It has also been established that unipolarswitched inverters can be designed to operate within the limits specified by the Australian Standard 4777.2, 2005 and that the low frequency harmonics can be maintained at acceptable levels.For a current controller using unipolar switching, the choice of only one of four equivalent switching combinations of the inverter switches leads to suppression of switching noise, and prevents unwanted switching without the need for additional filters. Results are presented to demonstrate the unique advantage of unipolarswitching over bipolar switching.
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Fraser, Malcolm E. "Power factor-corrected transformerless three-phase PWM converter for UPS applications." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/33002.

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This thesis describes the research of a new transformerless three phase PWM converter for uninterruptible power supplies (UPS) applications. The removal of the bulky three phase transformer in larger power UPS can provide a significant saving in weight and cost of the overall system. The converter consists of a new four-wire rectifier coupled with a four-wire inverter via a dc bus. The supply and load neutral may be connected together without any neutral current flowing into the utility regardless of the load on the inverter. This allows the load to be at the same potential as the utility. The rectifier, inverter and complete UPS and control system are described in detail and simulation results are used extensively to back up the theory. An experimental prototype of the four-wire rectifier provides further confirmation of the principles. A further proposal to digitize the system is given. This would reduce the size of the required control circuit and simplify the hardware requirements.
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Lam, Chi Seng. "Over-operating voltage and stability study of a transformerless-coupled dynamic voltage restorer." Thesis, University of Macau, 2005. http://umaclib3.umac.mo/record=b1445894.

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Photong, Chonlatee. "A current source inverter with series AC capacitors for transformerless grid-tied photovoltaic applications." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13128/.

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The Current Source Inverter (CSI) is one of the simplest power converter topologies that can convert DC to AC and feed power generated from photovoltaic (PV) cells into the AC grid with a single power conversion stage over the whole PV voltage range. The CSI also provides smooth DC current which is one of the requirements of the PV cells as well as preventing reverse current using unidirectional switches. However, the CSI operates with low efficiency at lower PV voltages, which is where the PV cells produce maximum output power. This low efficiency is caused by large differences in voltage levels between the PV side and the grid side across the converter. This thesis presents an alternative topology to the three-phase CSI by connecting an AC capacitor in series with each AC phase line of the CSI circuit. The presence of the series AC capacitors in the CSI topology allows the AC voltage levels to be adjusted to match the voltage levels of the PV cells. Therefore, the CSI with series AC capacitors is able to operate with optimal DC-AC voltage levels. Performance of the proposed topology is evaluated in comparison to the standard CSI and five other converter topologies based on transformerless circuit concepts selected from those already available in the market and suitable converters discussed in the literature. All converter topologies were modeled and simulated with the SABER simulation software package. The CSI with series AC capacitors prototype was constructed in order to validate the feasibility of the proposed topology and the performance of the proposed topology in comparison to the standard CSI. Simulation results show that the CSI with series AC capacitors provides improved efficiency and better input/output power quality in comparison to the standard CSI. The proposed topology also achieves the lowest output line current distortion, lowest voltage stress across the circuit components and lowest estimated cost of power semiconductors when compared to all considered topologies. Experimental results are also presented to validate the simulation results.
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Ozkan, Ziya. "Leakage Current And Energy Efficiency Analyses Of Single Phase Grid Connected Multi-kva Transformerless Photovoltaic Inverters." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614236/index.pdf.

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In order to inject solar power to the utility grid, among various types of inverters, Grid Connected Transformerless Solar Inverters (GCTSI) are mostly preferred for residential or commercial applications. This preference is because of the high energy efficiency and low cost due to the absence of a line frequency or a high frequency transformer. Peak value of the efficiency characteristics of GCTSIs can reach 98%, which are selected topology, component optimization, switching strategy and operating condition dependent. In spite of the attractive energy efficiency characteristics of GCTSIs, due to the lack of galvanic isolation, these inverters are vulnerable to leakage currents, which are prohibitive for the safety and the maintenance reasons. The purpose of this research is to analyze GCTSIs in terms of their leakage current and energy efficiency characteristics. In the research, the leakage current mechanisms of GCTSIs are identified and grid connected solar inverters are classified in terms of their leakage current characteristics including the GCTSIs. In addition to the existing ones, several novel topologies are proposed enriching the family of GCTSIs. The leakage current and the inductor current ripple performances of GCTSI topologies are analyzed and evaluated by detailed simulations for 3 kVA and 10 kVA single-phase systems. In addition, the energy efficiency characteristics of GCTSIs are investigated in these power levels by making use of Calculated Average Power Per Switching Cycle (CAPPSC) method. The efficiency studies with CAPPSC method provide design guidelines and comparison of the GCTSI topologies in terms of their energy efficiency characteristics.
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Zanetti, Francesco. "Analisi teorica e sperimentale di uno schema di controllo per convertitori fotovoltaici monofase di tipo transformerless." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Il tema centrale dell’elaborato è lo studio dell’efficienza e del THD di due inverter monofase di tipo transformerless indicati comunemente con la sigla H6; uno è stato realizzato in silicio e l’altro in carbonato di silicio Nel primo capitolo è stato presentato il classico impianto fotovoltaico domestico, le normative che lo riguardano e le problematiche tecniche che lo caratterizzano; nel secondo capitolo invece sono state illustrate le varie tecniche di modulazione che è possibile attuare con la struttura dell’inverter H6 e si sono riportate anche le principali caratteristiche del nuovo materiale; il silicio carbonato. Nel terzo capitolo si è riportato l’intero programma di simulazione costruito con i tools di Matlab; Simulink e Plecs. Sono state riportate anche le principali ipotesi adottate per lo studio preliminare del progetto del sistema di misura. Il quarto capitolo è stato dedicato invece alle simulazioni che sono state svolte per identificare le possibili problematiche dell’impianto sia durante la fase di avviamento che in condizioni di regime. Nel quinto capitolo si è descritto il processo di discretizzazione necessario per implementare il codice utilizzato nelle simulazioni sui dispositivi elettronici; che per funzionare richiedono delle grandezze digitali in ingresso. Il sesto capitolo è stato incentrato sulla realizzazione e sul collaudo del banco di misura; mentre nel settimo capitolo si sono elencati i risultati delle prove sperimentali ottenuti. L’elaborato termina con le conclusioni tratte dai dati, che confermano l’alta efficienza del dispositivo realizzato in SiC rispetto a quello realizzato in Si e forniscono ulteriori informazioni sugli andamenti del THD sia per armoniche di ordine basso che quelle in alta frequenza.
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Salem, Qusay [Verfasser]. "A transformerless H-bridge inverter as a bidirectional power flow controller in a microgrid based P/V droop control / Qusay Salem." Ulm : Universität Ulm, 2020. http://d-nb.info/1208767070/34.

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Books on the topic "Transformerless"

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Xiao, Huafeng, and Xiaobiao Wang. Transformerless Photovoltaic Grid-Connected Inverters. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8525-8.

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McWhorter, Richard. The all American five radio: Understanding and restoring transformerless radios of the 1940's, 50's, and 60's. Chandler, AZ: Sonoran Pub., 2003.

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Fraser, Malcolm E. Power factor corrected transformerless three phase PWM converter for UPS applications. 1996.

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Book chapters on the topic "Transformerless"

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Aamir, Muhammad. "Proposed Transformerless Online UPS System." In Design of a Non-isolated Single Phase Online UPS Topology with Parallel Battery Bank for Low Power Applications, 41–66. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0493-4_3.

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Xiao, Huafeng, and Xiaobiao Wang. "Common-Ground Transformerless Grid-Connected Inverters." In CPSS Power Electronics Series, 189–216. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8525-8_5.

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Xiao, Huafeng, and Xiaobiao Wang. "Full-Bridge Transformerless PV Grid-Connected Inverters." In CPSS Power Electronics Series, 35–128. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8525-8_3.

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Xiao, Huafeng, and Xiaobiao Wang. "Half-Bridge Transformerless PV Grid-Connected Inverters." In CPSS Power Electronics Series, 129–88. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8525-8_4.

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Dennai, Mohammed Yassine, Hamza Tedjini, and Abdelfettah Nasri. "Transformerless PV Three Level NPC Central Inverter." In Lecture Notes in Networks and Systems, 669–78. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-37207-1_72.

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Sahoo, Pradyumna Kumar, Devidarshinee Pradhan, Prasanta Kumar Satpathy, and Prateek Kumar Sahoo. "Voltage Sag Mitigation Using Transformerless Dynamic Voltage Restorer." In AI in Manufacturing and Green Technology, 131–38. First edition. | Boca Raton, FL : CRC Press, 2020. |: CRC Press, 2020. http://dx.doi.org/10.1201/9781003032465-13.

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Xiao, Huafeng, and Xiaobiao Wang. "DC Current Rejection for Transformerless Grid-Connected Inverters." In CPSS Power Electronics Series, 217–48. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8525-8_6.

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Khan, Mohammed Ali, Ahteshamul Haque, and Varaha Satya Bharath Kurukuru. "Voltage-Balancing Control for Stand-Alone H5 Transformerless Inverters." In Lecture Notes in Electrical Engineering, 663–75. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6772-4_57.

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Yang, Xiaoguang, and Youhua Wang. "A Novel Transformerless Single-Phase Three-Level Photovoltaic Inverter." In Lecture Notes in Electrical Engineering, 317–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21762-3_41.

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Xiao, Huafeng, and Xiaobiao Wang. "Transformerless Photovoltaic Grid-Connected Inverters and Leakage Current Issue." In CPSS Power Electronics Series, 17–34. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8525-8_2.

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Conference papers on the topic "Transformerless"

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Das, A., V. K. Rajput, A. Chakraborty, M. Dhar, S. Ray, and R. Dutta. "A new transformerless DC." In 2010 International Conference on Industrial Electronics, Control and Robotics (IECR). IEEE, 2010. http://dx.doi.org/10.1109/iecr.2010.5720157.

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"SS transformerless photovoltaic systems." In IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2017. http://dx.doi.org/10.1109/iecon.2017.8216720.

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Vazquez, J., N. Vazquez, J. Vaquero, I. Mendez, C. Hernandez, and H. Lopez. "An integrated transformerless photovoltaic inverter." In IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2015. http://dx.doi.org/10.1109/iecon.2015.7392285.

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Ming, Wen-Long, and Qing-Chang Zhong. "Synchronverter-based transformerless PV inverters." In IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2014. http://dx.doi.org/10.1109/iecon.2014.7049164.

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Alzoubi, Muh'd I., Amanullah Maung Than Oo, and Salahuddin Azad. "Review of Transformerless Inverter Topologies." In Power and Energy Systems. Calgary,AB,Canada: ACTAPRESS, 2013. http://dx.doi.org/10.2316/p.2013.800-052.

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"Transformerless Grid-connected PV Systems." In 2019 IEEE International Conference on Industrial Technology (ICIT). IEEE, 2019. http://dx.doi.org/10.1109/icit.2019.8755039.

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Liu, Lingling, and Shaoru Zhang. "Transformerless DC-DC PWM converters." In 2015 IEEE 10th Conference on Industrial Electronics and Applications (ICIEA). IEEE, 2015. http://dx.doi.org/10.1109/iciea.2015.7334325.

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Das, Aparna, and G. Sheeja. "Photovoltaic H6-type transformerless inverter topology." In 2016 IEEE Annual India Conference (INDICON). IEEE, 2016. http://dx.doi.org/10.1109/indicon.2016.7839043.

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Poliseno, M. C., R. A. Mastromauro, M. Liserre, and A. Dell'Aquila. "High efficiency transformerless PV power converters." In 2012 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM 2012). IEEE, 2012. http://dx.doi.org/10.1109/speedam.2012.6264526.

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Suneel, NKV Sai, K. Vinod Kumar, and B. Praveena. "A modified transformerless hybrid buck converter." In 2015 International Conference on Electrical, Electronics, Signals, Communication and Optimization (EESCO). IEEE, 2015. http://dx.doi.org/10.1109/eesco.2015.7254056.

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You might also be interested in the extended bibliographies on the topic 'Transformerless' for particular source types:
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