In order to study the grounding characteristics of prestressed pipe pile used as natural grounding electrode of offshore photovoltaic in intertidal zone,a simulation model of prestressed pipe pile used as natural grounding electrode is established by using CDEGS.The impact of different seawater depth and silt layer thickness,different installed capacity and pile length on power frequency earthing resistance of photovoltaic arrays are analyzed as well as the impact of different pile length,number of pipe piles and seawater depth on impulse earthing resistance.According to the analysis,power frequency earthing resistance decreases with the increase of seawater depth,silt layer thickness and installed capacity,and gradually slows down and tends towards stability.While impulse earthing resistance decreases with the increase of the number of supports and seawater depth,and the magnitude of the decrease gradually slows down.The results show that using prestressed pipe pile as natural grounding electrode has the feasibility for offshore photovoltaic in intertidal zone.
offshore photovoltaic in intertidal zoneprestressed pipe pilepower frequency earthing resistanceimpulse earthing resistance
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