Review of Soft-Switching Topologies for Single-Phase Photovoltaic Inverters

Chen, Yenan; Xu, Dehong

doi:10.1109/tpel.2021.3106258

Cited by 38 publications

(14 citation statements)

References 140 publications

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“…Based on an analysis of the performance of the three-phase inverter in the solar PV system under dynamic load conditions, it is evident that the power quality of the CSI is inferior to that of the VSI [57]. Efficiency-wise CSI microinverters still tend to have efficiencies below 98%, as most conventional single-phase PV inverters use switching frequencies below 20 kHz [58]. Compared to the VSI, the CSI has the intrinsic drawback of not being able to withstand the open circuit faults present.…”

Section: Soft Switchingmentioning

confidence: 99%

Current Source Inverter (CSI) Power Converters in Photovoltaic Systems: A Comprehensive Review of Performance, Control, and Integration

Marignetti,

Di Stefano,

Rubino

et al. 2023

Energies

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Grid converters play a central role in renewable energy conversion. Among all inverter topologies, the current source inverter (CSI) provides many advantages and is, therefore, the focus of ongoing research. This review demonstrates how CSIs can play a pivotal role in ensuring the seamless conversion of solar-generated energy with the electricity grid, thereby facilitating stable and reliable integration. This study extensively investigates various categories of single-stage CSI photovoltaic inverters, categorizing them into two-level, three-level, and multi-level architectures. Furthermore, these inverters are classified based on construction attributes, power factor, and total harmonic distortion values to assess their compliance with the standards, such as IEEE 1547 and IEC 61727. This review also delves into diverse control strategies for seamless grid integration. This comprehensive assessment serves as a resource for researchers in the field, enabling them to effectively choose the most suitable CSI for their specific applications. Additionally, it offers a quick reference point to steer research endeavors toward refining the integration of CSIs within photovoltaic systems.

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Section: Soft Switchingmentioning

confidence: 99%

Current Source Inverter (CSI) Power Converters in Photovoltaic Systems: A Comprehensive Review of Performance, Control, and Integration

Marignetti,

Di Stefano,

Rubino

et al. 2023

Energies

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“…As stated in [27], single-phase inverters are expected to support the local grid voltage with a reactive power capability, however, existing soft-switching dc-ac topologies mostly focus on unity power factor operations due to their limits of applications in non-u.p.f conditions. For example, in TCM, serious output current distortion may appear on account of a low switching frequency near the current zero-crossing point when the power factor is low.…”

Section: ) Reactive Power Capabilitymentioning

confidence: 99%

Hybrid-Mode Adaptive Zero-Voltage Switching for Single-Phase DC–AC Conversion With Paralleled SiC MOSFETs

Jiang

Shen

Shillaber

et al. 2022

IEEE Trans. Power Electron.

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State-of-the-art soft-switching modulations such as critical conduction mode (CrM) and Triangular Current Mode (TCM) increase the conduction loss of power semiconductors and require variable switching frequencies, thus these soft-switching methods are seldom used in high-power DC-AC conversion. To achieve soft-switching while maintaining low RMS currents, this article proposes a Hybrid Quadrilateral and Continuous Current Mode (HQCCM) modulation for general high-frequency singlephase DC-AC conversion based on paralleled SiC MOSFETs. The proposed HQCCM adaptively operates in soft-switching Quadrilateral Current Mode (QCM) or hard-switching Continuous Conduction Mode (CCM) in one AC line cycle depending on the instantaneous AC load current. Thus, high efficiencies can be achieved over the full power range. This HQCCM modulation features adaptive soft-switching, constant switching frequency, compatibility to line filter and is applicable for high-power applications. A 4.4-kW single-phase DC-AC inverter is developed and tested to verify the advantages of the HQCCM. This article is accompanied by a video demonstrating the effectiveness of the proposed HQCCM in varying load scenarios.

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“…In the existing problem of ANPC inverter loss, soft-switching technology is used, which can effectively reduce the voltage and current stresses, switching losses, and electromagnetic interference of switching devices [10,11]. However, multiple switching tubes, as well as capacitors and inductors, need to be added to the inverter to generate resonance, which increases the device size and reduces the power density.…”

Section: Introductionmentioning

confidence: 99%

Model Predictive Control Strategy Based on Loss Equalization for Three-Level ANPC Inverters

Wan,

Wang,

Chen

et al. 2024

Actuators

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Targeting the issue of high losses of individual switching tubes in Neutral-Point Clamped (NPC) three-level inverters, an Active Neutral-Point Clamped (ANPC) three-level inverter is used, and a model predictive control strategy using the loss equalization of the inverter is proposed. This method organizes and analyzes multiple zero-state current pathway commutation modes and adds mode three under the original two commonly used zero-state commutation modes. On this basis, the three modes are flexibly switched by model predictive control, and the output is optimized according to the value function for the space vector in each operation, while the midpoint voltage control is added to the value function. The simulation results suggest that the recommended strategy in this study may effectively realize the loss equalization control and midpoint voltage control of the ANPC inverter, which improves the operation efficiency of the electromechanical actuator.

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Review of Soft-Switching Topologies for Single-Phase Photovoltaic Inverters

Cited by 38 publications

References 140 publications

Current Source Inverter (CSI) Power Converters in Photovoltaic Systems: A Comprehensive Review of Performance, Control, and Integration

Current Source Inverter (CSI) Power Converters in Photovoltaic Systems: A Comprehensive Review of Performance, Control, and Integration

Hybrid-Mode Adaptive Zero-Voltage Switching for Single-Phase DC–AC Conversion With Paralleled SiC MOSFETs

Model Predictive Control Strategy Based on Loss Equalization for Three-Level ANPC Inverters

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