Optimization of SiC-based H5 and Conergy-NPC transformerless PV inverters

Saridakis, Stefanos; Koutroulis, Eftichios; Blaabjerg, Frede

doi:10.1109/ecce.2013.6647336

Cited by 22 publications

(23 citation statements)

References 23 publications

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“…Figure 8 presents the generation of AC currents for the positive and negative switching states. Modeling output filter and advancing switching frequency in the H5 topology of the PV inverter, has been illustrated in [53] by using power devices based on SiC. The proposed design shows the dominance of H5 topology based on enhanced SiC, correlating silicon (Si)-based counterparts and non-optimized with respect to energy production.…”

Section: H5 Inverter (Sma)mentioning

confidence: 99%

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

et al. 2018

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Abstract:The research significance of various scientific aspects of photovoltaic (PV) systems has increased over the past decade. Grid-tied inverters the vital elements for the effective interface of Renewable Energy Resources (RER) and utility in the distributed generation system. Currently, Single-Phase Transformerless Grid-Connected Photovoltaic (SPTG-CPV) inverters (1-10 kW) are undergoing further developments, with new designs, and interest of the solar market. In comparison to the transformer (TR) Galvanic Isolation (GI)-based inverters, its advantageous features are lower cost, lighter weight, smaller volume, higher efficiency, and less complexity. In this paper, a review of SPTG-CPV inverters has been carried out. The basic operational principles of all SPTG-CPV inverters are presented in details for positive, negative, and zero cycles. A comprehensive analysis of each topology has been deliberated. A comparative assessment is also performed based on weaknesses, strengths, component ratings, efficiency, total harmonic distortion (THD), semiconductor device losses, and leakage current of various SPTG-CPV inverters schemes. Typical PV inverter structures and control schemes for grid connected three-phase system and single-phase systems are also discussed, described, and reviewed. Comparison of various industrial grids-connected PV inverters is also performed. Loss analysis is also performed for various topologies at 1 kW. Selection of appropriate topologies for their particular application is thoroughly presented. Then, discussion and forthcoming progress are emphasized. Lastly, the conclusions are presented. More than 100 research publications on the topic of SPTG-CPV inverter topologies, configurations, and control schematics along with the recent developments are thoroughly reviewed and classified for quick reference.

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Section: H5 Inverter (Sma)mentioning

confidence: 99%

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

et al. 2018

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“…The on-state voltage of SiC-based MOSFET and Schottky diode are calculated as follows [13]: The on-state resistances for SiC MOSFET switch as a function of the semiconductor junction temperature are as follows [14]:…”

Section: A Sic Convertermentioning

confidence: 99%

Performance benchmark of Si IGBTs vs. SiC MOSFETs in small-scale wind energy conversion systems

Hussein

Castellazzi

Wheeler

et al. 2016

2016 IEEE International Power Electronics and Motion Control Conference (PEMC)

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Access from the University of Nottingham repository:http://eprints.nottingham.ac.uk/40236/1/Performance%20benchmark%20of%20Si%20IGBTs %20vs.%20SiC%20MOSFETs%20in%20small-scale%20wind%20energy%20conversion %20systems.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.

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“…In [17], an all SiC switching cell is evaluated to show that up to 1.5% improvement in European efficiency can be obtained. In [20], the use of SiC switches in design of optimized filters for H5 and Conergy-NPC transformer-less PV inverters is presented.…”

Section: Introductionmentioning

confidence: 99%

Design and Comparison of a 10-kW Interleaved Boost Converter for PV Application Using Si and SiC Devices

Mouli

Schijffelen²,

Bauer

et al. 2017

IEEE J. Emerg. Sel. Topics Power Electron.

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Grid connected PV inverters have a DC/DC converter connected to the PV for executing the maximum power point tracking (MPPT). The design of an interleaved boost converter (IBC) with three switching legs for 10kW PV inverter is presented in this paper. The paper shows how the use of SiC switches and powdered iron core inductors enables the operation of the converter at a higher switching frequency and increasing the converter power density. The IBC is designed using 1.2kV SiC MOSFET and Schottky diodes and KoolMμ powdered iron inductors. The design is compared with an IBC built with Si IGBT, fast recovery Si diodes and ferrite cores. The use of SiC devices reduces the switching loses drastically and there is no reverse recovery losses, resulting in improved efficiency. The higher frequency and higher saturation flux density of the powdered iron core enables the reduction in core size by three times. A 10kW prototype is built and tested for both the Si and SiC design and compared with theoretical estimations.Index Terms-Interleaved boost converter, powered iron core, photovoltaic systems (PV), silicon carbide (SiC).

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Optimization of SiC-based H5 and Conergy-NPC transformerless PV inverters

Cited by 22 publications

References 23 publications

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

Performance benchmark of Si IGBTs vs. SiC MOSFETs in small-scale wind energy conversion systems

Design and Comparison of a 10-kW Interleaved Boost Converter for PV Application Using Si and SiC Devices

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