Multilevel converters for single-phase grid connected photovoltaic systems: an overview

Calais, Martina; Agelidis, Vassilios G.; Meinhardt, M.

doi:10.1016/s0038-092x(99)00035-3

Cited by 162 publications

(56 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Low cost is the distinguishing feature, but the output voltage waveforms with two levels, switches must withstand high potential and highly distorted output current results in high electromagnetic inference (EMI) emissions and is considered a drawback of this topology [43]. The multi-level HB suggested by Calais et al [44] in which he explored the concerns such as stimulus of the PV array Earth resistance and system power rating, stress and component count for SPG-C PV structures. For grid-connected PV system, HB is cascaded in five levels, as suggested in [45].…”

Section: H-bridge Based Inverter Structuresmentioning

confidence: 99%

“…(0 → + → 0 → − → 0) ; (b) because there is no exchange of reactive power between CPV and L1(2) during zero voltage and losses is reduced as one switch is conducting during active state, its efficiency is higher, up to 98%; (c) the EMI filtering requirement and the leakage current peaks is lower as is constant and is equal to VPV/4 has no switching frequency Figure 19. Schematic diagram of the Conergy NPC inverter [44,62].…”

Section: Advantagesmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2018

View full text Add to dashboard Cite

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.

show abstract

Section: H-bridge Based Inverter Structuresmentioning

confidence: 99%

Section: Advantagesmentioning

confidence: 99%

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

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In addition, decreases in the level of electromagnetic interference, in the switching loss and in the dv/dt stress can also be achieved [3]- [5]. A number of circuit topologies have been proposed and many modulation and control techniques have been developed to accommodate their potential widespread utilization in industrial applications.…”

Section: Introductionmentioning

confidence: 99%

New Three-Phase Multilevel Inverter with Shared Power Switches

Ping¹,

Rahim²,

Jamaludin³

2013

Journal of Power Electronics

View full text Add to dashboard Cite

Despite the advantages offered by multilevel inverters, one of the main drawbacks that prevents their widespread use is their circuit complexity as the number of power switches employed is usually high. This paper presents a new multilevel inverter topology with a considerable reduction in the number of power switches used through the switch-sharing approach. The fact that the proposed inverter applies two bidirectional power switches for sharing among the three phases does not prevent it from producing seven levels in the line-to-line output voltage waveforms. A modified scheme of space vector modulation via the application of virtual voltage vectors is developed to generate the PWM signals of the power switches. The performance of the proposed inverter is investigated through MATLAB/SIMULINK simulations and is practically tested using a laboratory prototype with a DSP-based modulator. The results demonstrate the satisfactory performance of the inverter and verify the effectiveness of the modulation method.

show abstract

“…Medium voltage converters have been proposed recently for grid connected PV systems [7]- [15]. Most of these proposals are based on the 3-level NPC multilevel converter, and the single-phase cascaded H-bridge multilevel converter.…”

Section: Introductionmentioning

confidence: 99%

Cascaded H-bridge multilevel converter multistring topology for large scale photovoltaic systems

Rivera

Kouro

et al. 2011

2011 IEEE International Symposium on Industrial Electronics

192

View full text Add to dashboard Cite

Abstract-Large scale grid connected photovoltaic (PV) energy conversion systems have reached the megawatt level. This imposes new challenges on existing grid interface converter topologies and opens new opportunities to be explored. In this paper a new medium voltage multilevel-multistring configuration is introduced based on a three-phase cascaded H-bridge (CHB) converter and multiple string dc-dc converters. The proposed configuration enables a large increase of the total capacity of the PV system, while improving power quality and efficiency. The converter structure is very flexible and modular since it decouples the grid converter from the PV string converter, which allows to accomplish independent control goals.The main challenge of the proposed configuration is to handle the inherent power imbalances that occur not only between the different cells of one phase of the converter but also between the three phases. The control strategy to deal with these imbalances is also introduced in this paper. Simulation results of a 7-level CHB for a multistring PV system are presented to validate the proposed topology and control method.

show abstract

Multilevel converters for single-phase grid connected photovoltaic systems: an overview

Cited by 162 publications

References 10 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

New Three-Phase Multilevel Inverter with Shared Power Switches

Cascaded H-bridge multilevel converter multistring topology for large scale photovoltaic systems

Contact Info

Product

Resources

About