Study On Lightning Protection For PV System

Mohd Hisanuddin, Zamharir (2012) Study On Lightning Protection For PV System. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This thesis presents the Study on Lightning Protection for PV System. Lightning protection on photovoltaic system is very important to avoid the effect of the strike damaging the photovoltaic system. An experiment was set up to study the propagation effect of the induce voltage to the solar panel by the horizontal discharge which produced by 1.2/50μs lightning wave shape. The propagation effect of the induce voltage lead to the existence of unwanted signal which may cause damage to the sensitive device. The experiment was conduct using impulse voltage generator in high voltage lab to generate impulse voltage. The impulse voltage was generated to represent 1.2/50μs lightning indirect strike. Source for the photovoltaic system tested. The experiment strategies are testing the photovoltaic system without shielded cable and with shielded cable. The main consideration for the parameters of unwanted signal such as the peak voltage and duration were analyzed. It is found that maximum voltage of unwanted signal is 1.64kV for unshielded cable. The maximum duration of unwanted signal is 0.82μs. On the other hand, the maximum voltage and maximum duration for shield cable are found to be 0.702kV and 0.14μs, respectively. Mean that, for photovoltaic system with proper shielded to the cable can reduce the unwanted signal effectively by reducing the peak voltage about 0.938kV while reducing the unwanted signal duration about 0.68μs. This thesis can be guidance to improve the protection system for photovoltaic system in future.

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