Degradation of photovoltaic panels induced by electric potential: Theoretical survey and computational study on the inverter operation influence

Irias, Nayara G. N.; Paula, Hélder de; Pereira, Philipe; Cardoso, E.N.; Lopes, Bruno Marciano

doi:10.1109/cobep.2015.7420165

Cited by 8 publications

(3 citation statements)

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“…The selection of inductor is based on its ripple current and maximum of average current. The value of the inductor can be related to its ripple current I L by the relation in (32).…”

Section: A Inductormentioning

confidence: 99%

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A Common Ground Four Quadrant Buck Converter for DC-AC Conversion

et al. 2022

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With the increasing stand-alone and grid integrated low power renewable energy generation, the use of non-isolated DC-AC converters has increased multifold. However, the non-isolated power conversion with conventional DC-AC converters can cause high leakage currents due to parasitic capacitances. To resolve this problem, research on common ground converter topologies is gaining significance. This paper presents a novel single-phase DC-AC converter with common ground for the input and output terminals. There are only minor modifications required in comparison to the topology of the commonly used conventional H-bridge inverter for DC-AC conversion. In addition, the basic components and their counts remain the same. The gain ratio of the proposed inverter is such that it reduces the effect of switching delays. The availability of common ground for DC input and AC output sides provides the advantage of zero common-mode voltage and avoids leakage currents due to parasitic capacitances. The voltage gain ratio of the proposed converter is superior compared to the H-bridge inverter. Further, the switch stresses, switch utilization ratio and ratings of the constituent components have been derived for an accurate design of the converter. The proposed converter is observed to be more preferable when compared with other converters and modulation techniques for leakage current elimination based on the number of components and complexity of the circuit and control. The simulation and experimental results for different loads and load changes are presented to verify the theoretical claims. It is capable of supporting real and reactive power while operating competently under sudden changes in load. Therefore, the proposed common ground DC-AC converter can replace the H-bridge by modifying its circuit or replacing it with readily available half-bridge modules to obtain zero common-mode voltage and leakage currents. Hence, it is particularly attractive for low-power renewable generation and energy storage system applications.

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“…The selection of inductor is based on its ripple current and maximum of average current. The value of the inductor can be related to its ripple current I L by the relation in (32).…”

Section: A Inductormentioning

confidence: 99%

“…A common-ground connection between the input and output terminals is most effective to bypass the parasitic capacitances, thereby eliminating leakage and circulating currents [32]. Accordingly, this concept has increasingly gained popularity [22], [33].…”

Section: Introductionmentioning

confidence: 99%

A Common Ground Four Quadrant Buck Converter for DC-AC Conversion

et al. 2022

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“…In grid-connected transformer-less photovoltaic (PV) inverters, leakage current is one of the most important problems that might arise. This is because of the high-frequency commonmode voltage and the potential-induced deterioration (PID) polarization effect [1]. For singlephase applications, the conventionally available two-level full-bridge inverter is the most common type of photovoltaic inverter employed.…”

Section: Introductionmentioning

confidence: 99%

New boost type single phase inverters for photovoltaic applications with reduced device count

Alaas

2024

PLoS ONE

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In recent years, single-stage boost inverters with common ground have shaped the inverter markets due to the many benefits associated with these types of inverters, including their high efficiency, single control scheme, and integrated boost converter. A new boost-type inverter that utilizes a common ground and has fewer switches is proposed in this article. It uses two DC-link capacitors connected in parallel and discharged independently while being charged simultaneously. The voltage for the positive and negative half cycles is supplied by the capacitors located at the top and bottom of the circuit, respectively. In addition, a comparison is made between the proposed circuit and the boost inverter already in use in the literature. Using PLECS as the computing software, the efficiencies are determined depending on the various percentages of output power. To validate performance, present experimental data, and attain the best possible efficiency of 97%, a 400 W prototype model is constructed. In addition to that, the breakdown of the costs is shown.

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A Single Stage Transformer-less Micro Inverter with Integrated Battery Storage System for Residential Applications

Alhuwaishel

Enjeti

2019

2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL)

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Degradation of photovoltaic panels induced by electric potential: Theoretical survey and computational study on the inverter operation influence

Cited by 8 publications

References 1 publication

A Common Ground Four Quadrant Buck Converter for DC-AC Conversion

A Common Ground Four Quadrant Buck Converter for DC-AC Conversion

New boost type single phase inverters for photovoltaic applications with reduced device count

A Single Stage Transformer-less Micro Inverter with Integrated Battery Storage System for Residential Applications

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