A High-Efficiency MOSFET Transformerless Inverter for Nonisolated Microinverter Applications

Chen, Baifeng; Gu, Bin; Zhang, Lanhua; Zahid, Zaka Ullah; Lai, Jih-Sheng; Liao, Zhiling; Hao, Ruixiang

doi:10.1109/tpel.2014.2339320

Cited by 109 publications

(47 citation statements)

References 25 publications

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“…Consequently, the simplified high frequency CM model of the proposed topology could be drawn as Fig.11. The equation for the total CM voltage can easily be derived from Fig.3.11 as: (14) Where VtCM represent total CM voltage. Finally, the simplified single loop CM model of the proposed topology is derived inFig.12.…”

Section: Leakage Current Analysis and Power Devices Loss Calculamentioning

confidence: 99%

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Transformer less MOSFET Inverter for Single Phase Drive and Grid-Tied Photovoltaic System

Srinivas¹

2018

IJRASET

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The grid tied photovoltaic system suffers a great loss because the performance of the transformer present in the inverter. The cost of the transformer is high and the maintaince cost is also high. Therefore transformer less inverter are widely used in grid tied photovoltaic system, due to the benefits of achieving high efficiency and low cost. The sinusoidal pulse width modulation of full bridge transformer less inverters can achieve high efficiency by using metal oxide semiconductor field effect transistor. Various topology has been implemented for transformer less inverter, but in that there is a problem of losses and reverse recovery characteristics. In our paper we are going to implement the centre tapped H bridge transformer less inverter topology for grid tied photovoltaic system to avoid the losses and leakage current. A clamped branch is added in the transformer less inverter. The added clamping branch clamps the freewheeling voltage at the freewheeling period. As the common mode voltage is kept constant for the whole grid period that reduces the leakage current. The splitting structure of inductor at the region of grid side avoids reverse recovery voltage and this improves the efficiency of the system. The detailed analysis of our topology with the operational modes, leakage current analysis and design consideration were implemented and the proposed inverter is applied for single phase induction motor.

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Section: Leakage Current Analysis and Power Devices Loss Calculamentioning

confidence: 99%

“…Finally, the simplified single loop CM model of the proposed topology is derived inFig.12. In the proposed inverter if LA = LB for a well-designed circuit with symmetrically structured magnetic, equation (14)can be rewritten as follows:…”

Section: Leakage Current Analysis and Power Devices Loss Calculamentioning

confidence: 99%

Transformer less MOSFET Inverter for Single Phase Drive and Grid-Tied Photovoltaic System

Srinivas¹

2018

IJRASET

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“…Like the conventional dual-mode time-sharing inverters [8], [11], [12], [21], only one power stage of this inverter operates at high frequency at any time. The switching power losses can be reduced a lot, compared to the traditional two-stage voltage source inverter with a DC / DC boost converter.…”

Section: (B)mentioning

confidence: 99%

LLCL-filter based single-phase grid-tied aalborg inverter

Feng

et al. 2014

2014 International Power Electronics and Application Conference and Exposition

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Abstract-The Aalborg Inverter is a new type of high efficient DC/AC grid-tied inverter, where the input DC voltage can vary in a wide range. Compared with the LCL-filter, the LLCL-filter can save the total inductance for the conventional voltage source inverter. In this paper, an LLCL-filter based Aalborg Inverter is proposed and its character is illustrated through the small signal analysis in both "Buck" and "Buck-Boost" mode. From the modeling, it can be seen that the resonant inductor in the capacitor loop has not brought extra control difficulties, whereas more inductance in the power loop can be saved. Simulation and experiments are carried out to verify the analysis and the design through an 220 V/50 Hz, 2000 W prototype.

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“…Also, failure of the PCS affects the reliability of the whole system. On the other hand, the microinverter configuration shown in Figure 1b, also referred to as the module-integrated converter (MIC), uses individual small PCSs mounted on each PV module, allowing a simple "plug and play" installation and more localized control such as independent maximum power point tracking (MPPT) at the individual PV module scale [15][16][17][18]. Compared to the centralized PCS configuration, this system is expected to be more reliable with higher energy yield, which justifies its minor cost increase.…”

Section: Introductionmentioning

confidence: 99%

A Time-Efficient Approach for Modelling and Simulation of Aggregated Multiple Photovoltaic Microinverters

et al. 2017

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This paper presents a time-efficient modeling and simulation strategy for aggregated microinverters in large-scale photovoltaic systems. As photovoltaic microinverter systems are typically comprised of multiple power electronic converters, a suitable modeling and simulation strategy that can be used for rapid prototyping is required. Dynamic models incorporating switching action may induce significant computational burdens and long simulation durations. This paper introduces a single-matrix-form approach using the average model of a basic microinverter with two power stages consisting of a dc-dc and dc-ac converter. The proposed methodology using a common or intermediate source between two average models of cascaded converters to find the overall average model is introduced and is applicable to many other converter topologies and combinations. It provides better flexibility and simplicity when investigating various power topologies in system-level studies of microinverter and other power electronic systems. A 200 W prototype microinverter is tested to verify the proposed average and dynamic models. Furthermore, MATLAB/Simulink (2010a, Mathworks, Natick, MA, USA) is used to show the improved simulation speed and maintained accuracy of the multiple microinverter configurations when the derived average model is compared to a dynamic switching simulation model.

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A High-Efficiency MOSFET Transformerless Inverter for Nonisolated Microinverter Applications

Cited by 109 publications

References 25 publications

Transformer less MOSFET Inverter for Single Phase Drive and Grid-Tied Photovoltaic System

Transformer less MOSFET Inverter for Single Phase Drive and Grid-Tied Photovoltaic System

LLCL-filter based single-phase grid-tied aalborg inverter

A Time-Efficient Approach for Modelling and Simulation of Aggregated Multiple Photovoltaic Microinverters

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