Transformerless Inverter with Charge Pump Circuit Concept for PV Application

Ardashir, Jaber Fallah; Sabahi, Mehran; Hosseini, Seyed Hossein; Blaabjerg, Frede; Babaei, Ebrahim; Gharehpetian, Gevork B.

doi:10.1109/jestpe.2016.2615062

Cited by 15 publications

(6 citation statements)

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“…Substituting 1into (27) and then simplifying gives Fig. 5c shows the waveforms of the terminal voltages v ag and v bg obtained from (18) and (1).…”

Section: H6 Inverter Topologymentioning

confidence: 99%

“…The standard stipulates that the magnitude of the leakage current cannot exceed 300 mA. In the literature, many solutions are available for leakage current minimisation in the transformerless PV inverters [26][27][28][29][30]. One approach for minimisation of leakage current is by isolating the PV array and the grid/standalone load during the zero state.…”

Section: Introductionmentioning

confidence: 99%

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Terminal voltage analysis for the transformerless PV inverter topologies in a single‐phase system

Sonti¹,

Jain²,

Agarwal³

et al. 2019

IET Renewable Power Generation

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This study presents an analysis of the terminal voltage of the basic photovoltaic (PV) inverter topologies available in the literature. The presented analysis utilises the switching function concept. Use of switching function in the analysis enables the inclusion of the effect of the pulse-width modulation technique or the switching strategy on the terminal voltage of the reviewed configuration. It gives insight into the switching action effects on the terminal voltage and provides every detail of the high-frequency transitions in the terminal voltage for the given switching strategy. Using the terminal voltage expression derived in terms of switching function, the analytical waveforms are obtained for various configurations. These waveforms are compared with the simulation and experimental results waveforms to justify the analysis given. This study also presents a bar chart view of the switching and conduction losses of the switches in the reviewed PV inverter topologies. The magnitude of high-frequency components in the terminal voltage and the leakage current is also presented in this study. The PV inverter topologies are also compared in terms of other aspects such as a number of devices used, asymmetry in operation, filter requirement etc.

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“…Substituting 1into (27) and then simplifying gives Fig. 5c shows the waveforms of the terminal voltages v ag and v bg obtained from (18) and (1).…”

Section: H6 Inverter Topologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Terminal voltage analysis for the transformerless PV inverter topologies in a single‐phase system

Sonti¹,

Jain²,

Agarwal³

et al. 2019

IET Renewable Power Generation

View full text Add to dashboard Cite

show abstract

“…Note that the dc source is not utilized to supply the load during negative voltage level and hence its negative terminal can remain connected to the neutral of ac output. Similar concept is extended in [13] (Fig. 1(b)) where two capacitors are adopted to ensure sufficient energy storage to supply the load during negative voltage level and reduce the magnitude of voltage ripple.…”

Section: Introductionmentioning

confidence: 99%

“…1. Existing multilevel inverter with common ac and dc ground presented in: (a) [12], (b) [13], (c) [14], (d) [15], (e) [16], (f) [17], (g) [18], (h) [19], (i) [20], and (j) [21] (the common ac and dc ground is located at dc source positive terminal instead of negative terminal in all other topologies). II.…”

Section: Introductionmentioning

confidence: 99%

A Novel Common-Ground-Type Nine-Level Dynamic Boost Inverter

Lee

Siwakoti

Barzegarkhoo

et al. 2022

IEEE J. Emerg. Sel. Topics Power Electron.

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Recently, inverters with a common ac and dc ground are gaining significant interests due to their zero common-mode voltage that made them particularly attractive for the solar photovoltaic (PV) application. However, the dc source current of the existing topologies is discontinuous, and their voltage gains are limited. This paper proposes a novel common-ground-type boost inverter that achieves continuous dc source current with significantly enhanced dynamic voltage gain. It consists of one boost inductor, four capacitors, nine power MOSFETs and two power diodes. Voltage-boosting and generation of 9-level ac voltage are achieved concurrently within a single-stage operation. The operation of the proposed CGT-9L-BI inverter is analyzed. Simulation and experimental results are presented for validation.

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“…Topologies based on the concept of charge pumps [1][2][3] or switched-capacitors (SCs) are popular owing to attractive features, such as voltage boosting with natural voltage balancing, in their capacitors [4]. In [5][6][7], an SC is used to establish the concept of virtual dc-bus that can be discharged to generate a negative voltage across the load. They can generate a symmetric 3-level ac voltage in a single-stage operation.…”

Section: Introductionmentioning

confidence: 99%

A Dual-Buck-Boost DC–DC/AC Universal Converter

et al. 2022

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This paper proposes a universal converter that is capable of operating in three modes for generating positive dc voltage, negative dc voltage, and sinusoidal ac voltage. By controlling the duty-cycle of two half-bridges, an inductor is operated at a high frequency to control the voltage across two film capacitors that constitute a dual-buck-boost converter. Two additional half-bridges operating at a fixed state or line frequency are used to select the mode of operation. Compared to the latest universal converter in the recent literature, the proposed topology has the same switch count while reducing the number of conducting switches for inductor current and reducing the number of switches operating at high frequency. The operation of the proposed dual-buck-boost dc–dc/ac universal converter is analyzed. Experimental results are presented for validation. The power conversion efficiency of the 100 W experimental prototype modeled in PLECS is approximately 98%.

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Transformerless Inverter with Charge Pump Circuit Concept for PV Application

Cited by 15 publications

References 0 publications

Terminal voltage analysis for the transformerless PV inverter topologies in a single‐phase system

Terminal voltage analysis for the transformerless PV inverter topologies in a single‐phase system

A Novel Common-Ground-Type Nine-Level Dynamic Boost Inverter

A Dual-Buck-Boost DC–DC/AC Universal Converter

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