Effect of group grounding on the potential rise across solar PV panels during lightning strike

Faisal Peer Mohamed, Wah Hoon Siew, Shekhar Mahmud

Research output: Contribution to conferencePaper

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Abstract

Grounding systems play a vital role for dissipating the energy originating from a lightning stroke to the earth, functioning as an important component for protection and safety. In a solar photovoltaic (PV) farm, solar PV panels are fixed on a grounded structure with bolts and nuts. The structure, the frame of the PV panels, and the bolts and nuts are metallic (together called the assembly) and the layout of all assemblies of the entire solar farm depends on the terrain where they are installed. Lightning protection systems which are installed on a solar PV farm are mostly based on a Franklin rod (connected to a down-conductor) as the preferred point of attachment. These lightning rods can be installed either as isolated systems or as non-isolated systems from the solar panel assemblies. This paper is focused on the effect of group grounding on the potential rise across the solar PV panels during lightning strike. This whole assembly is simulated for various lightning attachment points in PSPICE using the lossy transmission line model. Voltage drop at various points in the assembly is measured for various soil resistivity. Based on the simulation results, group grounding of solar PV panels with middle grounding shows relatively low voltage drops compared to end grounding.
Original languageEnglish
Number of pages5
Publication statusAccepted/In press - 1 Apr 2019
EventThe 11th Asia-Pacific International Conference on Lightning - Hong Kong, Hong Kong
Duration: 12 Jun 201914 Jun 2019
Conference number: 11

Conference

ConferenceThe 11th Asia-Pacific International Conference on Lightning
Abbreviated titleAPL 2019
CountryHong Kong
CityHong Kong
Period12/06/1914/06/19

Keywords

  • solar PV panels
  • lightning protection system
  • gounding

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    Peer Mohamed, F., Siew, W. H., & Mahmud, S. (Accepted/In press). Effect of group grounding on the potential rise across solar PV panels during lightning strike. Paper presented at The 11th Asia-Pacific International Conference on Lightning, Hong Kong, Hong Kong.