A Single-Stage uk-based Transformerless Inverter for 1-ϕ Grid-Connected PV Systems

Chamarthi, Phani Kumar; Gupta, Amit Kumar; Joshi, Manjunath V.; Agarwal, Vivek

doi:10.1109/pvsc.2017.8366123

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…In reference [64], with the aim of reducing THD and improving the output current in the structure of Figure 6b, two additional sources and switches are used on the input side of the converter. Many other similar structures can be found in references [65][66][67][68].…”

Section: Combination Of Different Types Of Dc-dc Convertersmentioning

confidence: 99%

Single-Stage Buck–Boost Inverters: A State-of-the-Art Survey

2022

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Single-stage buck–boost inverters have attracted the attention of many researchers, due to their ability to increase/decrease the output voltage in one power conversion stage. One of the most important uses of these inverters is in photovoltaic applications, where the voltage of the solar panels varies in a wide range. In recent years, many new inverters have been proposed to improve the performance of existing structures. In this paper, the state of the art of these single-stage buck–boost inverters is discussed. The advantages and disadvantages of each structure are examined from different perspectives, such as the number of components, losses, and performance. Finally, in a general comparison, the properties of all structures are discussed and summarized in a table.

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Section: Combination Of Different Types Of Dc-dc Convertersmentioning

confidence: 99%

Single-Stage Buck–Boost Inverters: A State-of-the-Art Survey

2022

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“…The converters introduced in [69][70][71][72][74][75][76][77][78] are suffering from asymmetric conducting paths during positive and negative half-cycles. Therefore, DC current component may be generated;…”

Section: Buck/boost Vscgmentioning

confidence: 99%

“…Voltage-source common-ground (CSCG) converters (buck/boost type). (a) Converter presented in the work of [64], (b) converter presented in the work of[65], (c) converter presented in the work of[66], (d) converter presented in the work of[67,68], (e) converter presented in the work of[69], (f) converter presented in the work of[70,71], (g) converter presented in the work of[72], (h) converter presented in the work of[73], (i) converter presented in the work of[74], (j) converter presented in the work of[75], (k) converter presented in the work of[76][77][78], (l) converter presented in the work of[79], (m) converter presented in the work of[80], (n) converter presented in the work of[81], (o) converter presented in the work of[82], (p) converter presented in the work of[83].…”

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confidence: 99%

Common-Ground Photovoltaic Inverters for Leakage Current Mitigation: Comparative Review

et al. 2021

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In photovoltaic systems, parasitic capacitance is often formed between PV panels and the ground. Because of the switching nature of PV converters, a high-frequency voltage is usually generated over these parasitic capacitances; this, in turn, can result in a common-mode current known as leakage current. This current can badly reach a high value if a resonance circuit is excited through the PV’s parasitic capacitance and the converter’s inductive components. Transformers are usually used for leakage current mitigation. However, this decreases the efficiency and increases the cost, size, and weight of the PV systems. Number of strategies have been introduced to mitigate the leakage current in transformer-less converters. Among these strategies, using common-ground converters is considered the most effective solution as it offers a solid connection between the negative terminal of PV modules and the neutral of the grid side; thus, complete mitigation of the leakage current is achieved. Number of common-ground inverters have been recently presented. These inverters are different in their size, cost, boosting capability, the possibility of producing DC currents, and their capability to offer multilevel shaping of output voltage. This work introduces a comprehensive review and classification for various common-ground PV inverters. Therefore, a clear picture of the advantages and disadvantages of these inverters is clarified. This provides a useful indication for a trade-off between gaining some of the advantages and losing others in PV systems. In addition, the potentials for optimization based on different performance indicators are identified.

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