An experimental approach of the transient effects of lightning currents on the overvoltage protection system in MW-class photovoltaic plants

Hernández, Y Méndez; Ioannidis, D.; Ferlas, G.; Tsovilis, Thomas E.; Politis, Z.; Samaras, K.

doi:10.1109/iclp.2014.6973451

Cited by 14 publications

(5 citation statements)

References 2 publications

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“…In [2], scientific background and essential assumptions taken for the design of lightning protection systems for PV systems are discussed. Field measurements are presented in [6,13,14], and the performance of PV systems under both direct and indirect lightning strikes is investigated. Experimental tests on single PV modules or reduced-scale PV arrays are analyzed in [3,8,[15][16][17][18][19][20][21][22] to show the transient behavior.…”

Section: Introductionmentioning

confidence: 99%

“…Although efforts have been made to characterize the high-frequency modelling of PV module/array under lightning strikes, as previously described, it is found that studies usually considered simple frequency models for the PV array components (inaccurate models under transient conditions), and just a few researchers have considered accurate high-frequency models [13,23]. An efficient high-frequency modelling for the PV module would therefore be necessary to provide effective lightning protection.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of PV Module and DC/DC Converter Assembly for the Analysis of Induced Transient Response Due to Nearby Lightning Strike

Formisano

Hernández

Petrarca³

et al. 2021

Electronics

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Photovoltaic (PV) systems are subject to nearby lightning strikes that can contribute to extremely high induced overvoltage transients. Recently, the authors introduced a 3D semi-analytical method to study the electromagnetic transients caused by these strikes in a PV module. In the present paper we develop an improved model of the PV module that: (a) takes into account high-frequency effects by modelling capacitive and inductive couplings; (b) considers the electrical insulation characteristics of the module; (c) includes the connection to a DC/DC converter. The whole process involves three major steps, i.e., the magnetic-field computation, the evaluation of both common-mode- and differential-mode-induced voltages across the PV module, and the use of the calculated voltages as input to a lumped equivalent circuit of the PV module connected to the DC/DC converter. In such a framework, the influence of the PV operating condition on the resulting electrical stresses is assessed; moreover, the relevance or insignificance of some parameters, such as the module insulation or the frame material, is demonstrated. Finally, results show that the induced overvoltage are highly dependent both on the grounding of the conducting parts and on the external conditions such as lightning current waveforms and lightning channel (LC) geometry.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling of PV Module and DC/DC Converter Assembly for the Analysis of Induced Transient Response Due to Nearby Lightning Strike

Formisano

Hernández

Petrarca³

et al. 2021

Electronics

View full text Add to dashboard Cite

show abstract

“…Complementarily, other works [47][48][49][50] focus on the experimental assessment of just one among the above-cited aspects.…”

Section: Introductionmentioning

confidence: 99%

“…A review of the PV literature [38][39][40][41][42][43][44][45][46][47][48][49][50] allows to disclose that just some references [41,42,51] assessed the overvoltage induced by nearby lightning strikes. Note that research in [41] did perform the study using a vertical straight segment to model the lightning channel (LC).…”

Section: Introductionmentioning

confidence: 99%

“…As concerning the metallic parts inside PV module, to analyse EM couplings of PV modules, the most adopted model treats the PV module as a single conducting loop [38][39][40][41][42][43][44][45][46][47][48][49][50][51], allowing differential-mode computation only [2]. The simplified model does not consider the inner structure of PV modules, their metal frames, and other elements.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of induced voltages in common and differential‐mode for a PV module due to nearby lightning strikes

Formisano¹,

Petrarca²,

Hernández

et al. 2019

IET Renewable Power Generation

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Nearby lightning strikes are prone to induce overvoltage transients in photovoltaic (PV) modules and in their power conditioning circuitry, which can permanently damage the PV system. Therefore, it becomes important to establish a method for accurate assessment of such transients. To this aim, the authors propose a three-dimensional (3D) semi-analytical numerical method to study the electromagnetic transients caused in PV modules by nearby lightning strikes. The approach bases on a semi-analytical expression of the magnetic vector potential generated by a geometrically complex lightning channel. The proposed method is able to calculate the transient overvoltage in a PV module, both in common and differential-mode, taking also into account capacitive and inductive couplings between the internal circuit and the PV metallic frame. Both modes are required to design the surge protective devices (SPDs) in PV power systems. Comparing to the models in literature, the proposed approach explicitly considers the complex geometry of the lightning channel. Statistical analysis allows assessing the impact of channel geometry by randomly generating a number of likely lightning paths. Results show that the lightning-induced overvoltage in a PV module is highly dependent on factors such as distance to the lightning channel and lightning channel geometry.

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Lightning protection of PV systems

2015

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An experimental approach of the transient effects of lightning currents on the overvoltage protection system in MW-class photovoltaic plants

Cited by 14 publications

References 2 publications

Modeling of PV Module and DC/DC Converter Assembly for the Analysis of Induced Transient Response Due to Nearby Lightning Strike

Modeling of PV Module and DC/DC Converter Assembly for the Analysis of Induced Transient Response Due to Nearby Lightning Strike

Assessment of induced voltages in common and differential‐mode for a PV module due to nearby lightning strikes

Lightning protection of PV systems

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