Robustness analysis of the efficiency in PV inverters

Pigazo, Alberto; Liserre, Marco; Blaabjerg, Frede; Kerekes, Tamás

doi:10.1109/iecon.2013.6700296

Cited by 8 publications

(7 citation statements)

References 16 publications

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“…A statistical approach for performance evaluation of PV inverters is proposed in [10] and applied to a transformer-based H4 topology. The variability of IGBT and diode parameters due to the employed technology and the characteristics of the manufacturing process allows the performance of PV inverter topologies to be evaluated during the design stage.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of transformerless PV inverter topologies to physical variations of power devices

Pigazo

Jedtberg

Liserre

2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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Abstract-Transformerless (TL) topologies are employed in 1φ PV inverter topologies due to their small size and low weight. Avoiding the grid side transformer requires the modulation technique and the basis topology to be accordingly changed in order to mitigate dc current components in the grid side and the leakage current to ground.This paper carries out a sensitivity analysis of selected TL topologies. This analysis investigates the impact of parameter variations of the employed semiconductor devices and detects the device which affects the most the overall efficiency. As a result, relevant info for engineers selecting the most suitable power devices for the implementation of a certain TL topology is provided.

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Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of transformerless PV inverter topologies to physical variations of power devices

Pigazo

Jedtberg

Liserre

2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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“…Anti-paralleled diodes in the package have also been modelled considering conduction resistance (R on ), forward current (I f ) and voltage (V f ), the rate of change of the forward current ( ∂I f ∂t ), the peak recovery current (I rrm ), the stored charge (Q rr ) and the reverse recovery time T rr . These parameters have been changed during the simulation tests according to the characteristics of the commercially available power devices, which have been statistically analysed in [10]. Table I shows the parameters of the employed probability distribution functions.…”

Section: B Analysis Of the Effect Of Physical Variationsmentioning

confidence: 99%

“…Similar analyses have been carried out in [8] and [9] and, in all cases, the obtained results, both in simulation and experimentally, correspond to some power devices selected for simulation purposes or the implementation of prototypes. This work considers the approach shown in [10], where a statistical approach is proposed for evaluation of the H4 topology and selection of the most suitable power devices for its implementation in 1φ PV inverters. This approach would allow the performance of the transformerless topologies for PV inverters to be analysed considering the available technologies for IGBT modules.…”

Section: Introductionmentioning

confidence: 99%

Robustness evaluation of transformerless PV inverter topologies

Jedtberg

Pigazo

Liserre

2014

2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL)

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Abstract-Transformerless PV inverter topologies allow the PV inverter size and weight to be reduced while reaching a higher efficiency. The drawbacks of these topologies are that DC current components at the grid side must be cancelled by means of the employed controller and the number of power devices required to avoid currents through the parasitic capacitor of the PV generator increases.These topologies have been analysed in the literature but physical variations of power devices due to the manufacturing process have not been taken into account. This manuscript analyses the effect of such physical variations on the performance of three commonly employed transformerless topologies: H5, HERIC and Half-Bridge NPC. The impact of the parameter variations is compared regarding the efficiencies at different power levels, the European Efficiency and the DC current components. The results indicate that physical variations lead to different behaviors regarding the robustness of the analysed topologies. By means of statistical analyses these differences are obtained and exposed.

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“…2) consists of the characterization of the physical parameters of power devices for modeling purposes. These physical characteristics were analyzed in [25] for a set of commercially available IGBT power modules, resulting in the most suitable probability distribution functions (pdfs) applicable to IGBT (R on , , with V and I being the nominal power of the modules) and diode parameters (R on ,…”

Section: A Sensitivity Assessment Proceduresmentioning

confidence: 99%

“…Similar analyses have been carried out in [23] and [24] and, in all cases, the obtained results, both in simulation and experimentally, are valid for the specifically considered power devices selected for simulation purposes or the implementation of prototypes. The variability of IGBT and diode parameters due to the employed technology and the characteristics of the manufacturing process is considered in [25], where a statistical approach for performance evaluation of transformer-based H4 topology is proposed. In [26] the impact of parameter variability on TL PV inverter topologies is first discussed.…”

Section: Introductionmentioning

confidence: 99%