Analysis and design of coupled inductor for a new single phase transformerless photovoltaic inverter topology

Kleeb, Thiemo; Kazanbas, Mehmet; Menezes, L.; Zacharias, Peter

doi:10.1049/cp.2012.0195

Cited by 3 publications

(2 citation statements)

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“…where D n is the nominal duty ratio and D c is the control duty ratio. From (11) and (12), the nominal duty ratio D n and the control duty ratio D c can be derived as…”

Section: Bi-directional Control Methodsmentioning

confidence: 99%

“…Alternatively, the HF transformer increases the power losses and system complexity. To solve the above mentioned problems of the transformer-type inverter, many transformerless-type inverters have recently been introduced and popularised, particularly in single-phase systems, because of their higher efficiency, smaller size and lower cost than those of transformer-type inverters [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Single‐phase transformerless bi‐directional inverter with high efficiency and low leakage current

Lee

Kim

Kwon

et al. 2014

IET Power Electronics

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This study proposes a high efficient bi-directional inverter for a photovoltaic (PV) system integrated with an energy storage system. The proposed bi-directional inverter controls the bi-directional power flow and satisfies the power requirement between the grid and the dc sources. The proposed bi-directional inverter achieves high efficiency by employing a transformerless structure and by minimising the power losses. The inverter structure can suppress the leakage current, which is considered to be one of the most important design parameters in a transformerless PV system. The efficiency and leakage current of the proposed bi-directional inverter are analysed. Furthermore, its bi-directional operation principles and control method are described. Finally, a 3-kW prototype is implemented to confirm the theoretical analysis and the validity of the proposed bi-directional inverter.

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“…where D n is the nominal duty ratio and D c is the control duty ratio. From (11) and (12), the nominal duty ratio D n and the control duty ratio D c can be derived as…”

Section: Bi-directional Control Methodsmentioning

confidence: 99%