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Evaluating the Risk of Direct Lightning Strike and Design of Lightning Rods Installation Case Study on 25 kWp PV Farm System Installed in Thailand
S. Hiranvarodom, S. Ittarat, B. Plang-klang
PV System, Lightning Protection
Subtopic: PV System and Grid Integration Aspects
Event: 28th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5BV.7.67
4290 - 4293
ISBN: 3-936338-33-7
Paper DOI: 10.4229/28thEUPVSEC2013-5BV.7.67
0,00 EUR
Document(s): paper


Due to the fact that Photovoltaic (PV) farm systems must be practically installed in outdoor areas for converting solar radiation into electric power. For this reason, PV farm systems have to face the risk of damage against direct lightning strikes. Mostly, PV power plants installed in Thailand, they have still not been protected by lightning rods installation. Then this paper provides the useful information about lightning protection system on the 25 kWP PV farm system that to be installed at Thayang district of Phetchaburi province in Thailand. A computer program is developed for making a decision on either requirement to install lightning protection system or not. If needed, the results from computer program can give a suitable data, such as the number of lightning rods, a dimension of lightning protection system using the protective angle method. This also includes the risk evaluation of direct lightning strikes. Since, the 25 kWP PV farm system installed at Thayang district of Phetburi province in Thailand faces the risk of damage against direct lightning on average 4.15 times per year. Accordingly, the proposed computer program is able to design suitably for lightning rods installation and to be verified the results with same method by another 3D drawing program. From the results show that all components of the 25 kWP PV farm system are protected properly by lightning rods. Consequently, the project owner is notified that the 25 kWP PV farm system should install lightning rods to protect the damage from direct lightning strikes. This method is useful for application in many places, not just in Thailand, where PV farm systems are installed while they have no lightning protection system in initial stage of PV system installation.