A Family of Zero-Current-Transition Transformerless Photovoltaic Grid-Connected Inverter

Xiao, Hua F.; Lan, Ke; Zhou, Bin; Zhang, Li; Wu, Zheng-Mao

doi:10.1109/tpel.2014.2337513

Cited by 56 publications

(18 citation statements)

References 28 publications

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“…The efficiency of these topologies can be increased by employing SiC devices and/or soft switching, e.g. [3] demonstrates that the efficiency of H6-I topology, at nominal power, can be improved by applying zero-current softswitching (more than 2 %) and, as presented in [4], through zero-voltage soft-switching (more than 2.5 %). A topology with two power MOSFETS is proposed in [5] to reduce the leakage current.…”

Section: Introductionmentioning

confidence: 98%

Analysis of the Robustness of Transformerless PV Inverter Topologies to the Choice of Power Devices

Jedtberg

Pigazo

Liserre

et al. 2017

IEEE Trans. Power Electron.

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Section: Introductionmentioning

confidence: 98%

Analysis of the Robustness of Transformerless PV Inverter Topologies to the Choice of Power Devices

Jedtberg

Pigazo

Liserre

et al. 2017

IEEE Trans. Power Electron.

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“…In addition, this inverter does not present a proper efficiency at low output power. In Xiao et al, a family of zero‐current transition transformers‐less grid‐tied PV inverters has been presented. The presented converter cannot suppress the leakage current totally and has to use a DC‐DC converter to be able to work in the voltages lower than the voltage of the grid because of the lack of buck‐boost capability.…”

Section: Introductionmentioning

confidence: 99%

“…The presented converter cannot suppress the leakage current totally and has to use a DC‐DC converter to be able to work in the voltages lower than the voltage of the grid because of the lack of buck‐boost capability. Mentioned facts lower the efficiency and reliability of the presented inverter in Xiao et al A HERIC‐type grid‐connected inverter is presented in Xiao et al, which is soft‐switched. On the other hand, high numbers of active and passive elements besides lack of buck‐boost capability are its drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Single‐phase common mode transformer‐less soft‐switching grid‐connected inverter with eliminated leakage current

Azary

Sabahi

Babaei

2019

Circuit Theory & Apps

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Summary In this paper, a single‐phase single‐stage soft‐switching transformer‐less grid‐tied common mode inverter is proposed, which is useful for injection of power from the photovoltaic (PV) panels to the grid. One of the output ports of the PV panel in the proposed topology can be connected directly to the neutral point of the grid to eliminate the leakage current. The proposed topology has buck‐boost ability, besides soft switching capability to have a proper efficiency. Furthermore, the proposed converter can operate in unity power factor, therefore the proposed converter has most of the features needed for a PV inverter. A full analysis of the converter is done. Also, a suitable switching algorithm for correct operation of the converter is presented. Moreover, the design technique for the passive elements of the topology is demonstrated. The voltage gain of the converter is calculated. The leakage current of the proposed inverter due to the low‐ and high‐frequency voltage ripple of the PV panel has been discussed. Simulation results in PSCAD EMTDC plus experimental results from a laboratory prototype are added to substantiate the theoretical results. Eventually, a comprehensive comparison study is presented to compare the proposed topology with the most similar converters.

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“…The main inverter in this topology consists of six switching devices which are operated by sinusoidal modulation techniques. In [4] the main switches of inverter turn off with ZCT and the auxiliary switches turn on with ZCS.The presented a new topology. It uses two auxiliary switches and a diode to provide the ZVS transitions for main switches.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Three Phase Soft Switching Inverter Incorporating Fuzzy Logic Controller

2019

IJEAT

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A soft switching three phase inverter with the fuzzy logic system is proposed . The controller design is explained in this paper. The soft switching is achieved through zero voltage switching methods.The soft switching is attain through auxiliary circuits.Therefore, the auxiliary circuit will be enhanced the conversion efficiency, and the conduction loss will be scaled down. The performance of proposed controller is illustrated using MATLAB Simulink.The mode of the prototype is fabricated and tested. The Simulation and hardware results validate each other, which show that the presented method is both satisfactory and consistent with expectation.

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A Family of Zero-Current-Transition Transformerless Photovoltaic Grid-Connected Inverter

Cited by 56 publications

References 28 publications

Analysis of the Robustness of Transformerless PV Inverter Topologies to the Choice of Power Devices

Analysis of the Robustness of Transformerless PV Inverter Topologies to the Choice of Power Devices

Single‐phase common mode transformer‐less soft‐switching grid‐connected inverter with eliminated leakage current

Design and Analysis of Three Phase Soft Switching Inverter Incorporating Fuzzy Logic Controller

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