Evaluation of SPDs for a PV system using the FDTD method taking concrete foundations into consideration

Yonezawa, Kaname; Mochizuki, Sho; Takahashi, Yuichi; Idogawa, Teruo; Morii, Nobuyuki

doi:10.1109/iclp.2014.6973286

Cited by 10 publications

(2 citation statements)

References 2 publications

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“…A study of the transient currents in the grounding system using the FDTD was presented earlier [27], which was optimised to reduce the computation time by predicting the ground resistance. Moreover, the foundation model of the DC distribution system in the PV system was modelled, and the current withstand capability of the surge protective device (SPD) was evaluated using the FDTD method by analysing the transient overvoltages and currents in the PV system [28]. The research work presented earlier [29] proposed an FDTD model of the thin wire with a noncircular cross-section, which was used to analyse the transient behaviour during lightning.…”

Section: Introductionmentioning

confidence: 99%

Evaluating transient behaviour of large‐scale photovoltaic systems during lightning events using enhanced finite difference time domain method with variable cell size approach

Hetita,

Mansour,

Han

et al. 2024

High Voltage

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Photovoltaic (PV) arrays are usually installed in open areas; hence, they are vulnerable to lightning strikes that can result in cell degradation, complete damage, service disruption, and increased maintenance costs. As a result, it is imperative to develop an effective and efficient lightning protection system by evaluating the transient behaviour of PV arrays during lightning events. The aim is to evaluate the transient analysis of large‐scale PV systems when subjected to lightning strikes using the finite difference time domain (FDTD) technique. Transient overvoltages are calculated at various points within the mounting system. To optimise the FDTD method's execution time and make it more suitable for less powerful hardware, a variable cell size approach is employed. Specifically, larger cell dimensions are used in the earthing system and smaller cell dimensions are used in the mounting system. The FDTD method is utilised to calculate the temporal variation of transient overvoltages for large‐scale PV systems under different scenarios, including variations in the striking point, soil resistivity, and the presence of a metal frame. Simulation results indicate that the highest transient overvoltages occur at the striking point, and these values increase with the presence of a PV metal frame as well as with higher soil resistivity. Furthermore, a comparison is performed between the overvoltage results obtained from the FDTD approach and the partial element equivalent circuit (PEEC) method at the four corner points of the mounting systems to demonstrate the superior accuracy of the FDTD method. Besides, a laboratory experiment is conducted on a small‐scale PV system to validate the simulation results. The calculated overvoltages obtained from the FDTD and PEEC methods are compared with the measured values, yielding a mean absolute error of 5% and 11% for the FDTD and PEEC methods, respectively, thereby confirming the accuracy of the FDTD simulation model.

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Section: Introductionmentioning

confidence: 99%

Evaluating transient behaviour of large‐scale photovoltaic systems during lightning events using enhanced finite difference time domain method with variable cell size approach

Hetita,

Mansour,

Han

et al. 2024

High Voltage

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“…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. Overvoltage at the DC side is addressed in [3,4,8,[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Recently, the degradation of the PV module under impulse voltage was investigated [7,[30][31][32][33][34].…”

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

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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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Lightning protection of PV systems

2015

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Evaluation of SPDs for a PV system using the FDTD method taking concrete foundations into consideration

Cited by 10 publications

References 2 publications

Evaluating transient behaviour of large‐scale photovoltaic systems during lightning events using enhanced finite difference time domain method with variable cell size approach

Evaluating transient behaviour of large‐scale photovoltaic systems during lightning events using enhanced finite difference time domain method with variable cell size approach

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

Lightning protection of PV systems

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