A New Transformerless Inverter With Leakage Current Limiting and Voltage Boosting Capabilities for Grid-Connected PV Applications

Jahan, Hossein Khoun

doi:10.1109/tie.2019.2960728

Cited by 49 publications

(30 citation statements)

References 21 publications

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“…The switching frequency was 20 kHz. This frequency can reduce the requirement of capacitance according to Equation (15). The output frequency was 50 Hz.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Since the input voltage is relatively low compared with the output voltage, boost circuits [13,14] are required in many applications, such as grid-connected photovoltaic modules, distributed generation (DG) systems, and electric vehicles. Inductors or transformers are used in most boost circuits, making the systems bulky and heavy [15]. Therefore, a charge pump is typically adopted as a boost circuit [16].…”

Section: Introductionmentioning

confidence: 99%

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A Novel Switched-Capacitor Inverter with Reduced Capacitance and Balanced Neutral-Point Voltage

Xun

Ding

2021

Electronics

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A novel three-phase switched-capacitor multilevel inverter (SCMLI) with reduced capacitance and balanced neutral-point voltage is proposed in this paper. Applying only one DC source, the three-phase seven-level topology possessing voltage-boosting capability is accomplished without the high-voltage stress of power switches. Owing to the inherent redundant switching states of the proposed topology, two charging approaches that can effectively limit the voltage ripples and path selection for capacitors can be realized. This provides the presented topology with reduced capacitance, balanced neutral-point voltage, good performance in not only the three-phase four-wire system but also the three-phase three-wire system, and low total harmonic distortion (THD) of the output voltage. A comprehensive comparison with previous SCMLIs in various aspects is conducted to validate the merits mentioned above. The simulation results accord with theoretical analyses, confirming the feasibility of the proposed three-phase SCMLI.

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“…The switching frequency was 20 kHz. This frequency can reduce the requirement of capacitance according to Equation (15). The output frequency was 50 Hz.…”

Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Switched-Capacitor Inverter with Reduced Capacitance and Balanced Neutral-Point Voltage

Xun

Ding

2021

Electronics

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“…On the contrary, the NPC needs six extra switches and diodes compared to the HB-TPI. It is worth mentioning that, whereas the above-mentioned inverter topologies are mid-pint clamped inverters they can limit the common-mode current (leakage current) in applications where the stray capacitors of the equipment cause difficulties [20].…”

Section: Imentioning

confidence: 99%

Two-Stage Single-Source Full-Bridge Based Three- Phase Inverter for Medium Voltage Applications

Jahan

Pourebrahim

Tohidi

et al. 2020

2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)

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Conventional half-bridge based three-phase inverter (HB-TPI) and neutral-point-clamped inverters (NPC) are popular in the industry. Nevertheless, they suffer from buck characteristics. To tackle the issue, this paper proposes a new full-bridge-based inverter topology that is able to develop a stepped ac voltage with low voltage stress across the components. Since the inverter side of the proposed inverter is based on a switched capacitor, it is integrated with a front-end dc-dc converter to further increase the voltage gain and avoid inrush current. Simulation results are provided to validate the feasibility and effectiveness of the proposed inverter.

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“…e aim of [17] is to present a new type of transformerless inverters, which is a common ground-based topology and can improve the performance of the system by its inherent boosting feature and unipolar PWM scheme. In [18], a new inverter topology is proposed. e proposed inverter develops a fourlevel voltage through four switches, two diodes, and four capacitors.…”

Section: Introductionmentioning

confidence: 99%

A Novel Structure for Transformerless Grid-Connected PV Inverter to Eliminate Common-Mode Current under Mismatch Condition

Katouli

Rezanejad

Adabi

2022

International Transactions on Electrical Energy Systems

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Common-mode current is one of the major challenges in transformerless grid-connected photovoltaic (PV) inverters. This current is affected when the PV arrays are exposed to different environmental conditions and its value increases. This paper attempts to investigate the effect of mismatched condition on voltage balance of PV arrays, which leads to the increment of common-mode current. A new circuit structure is presented for compensating for voltage drop caused by partial shading and ambient temperature and removing the effect on the common-mode current. To validate the proposed structure, a laboratory prototype of this circuit is implemented.

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A New Transformerless Inverter With Leakage Current Limiting and Voltage Boosting Capabilities for Grid-Connected PV Applications

Cited by 49 publications

References 21 publications

A Novel Switched-Capacitor Inverter with Reduced Capacitance and Balanced Neutral-Point Voltage

A Novel Switched-Capacitor Inverter with Reduced Capacitance and Balanced Neutral-Point Voltage

Two-Stage Single-Source Full-Bridge Based Three- Phase Inverter for Medium Voltage Applications

A Novel Structure for Transformerless Grid-Connected PV Inverter to Eliminate Common-Mode Current under Mismatch Condition

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