Today, we come to share with friends about the correct prevention of lightning during the design of photovoltaic power plants.
First, it is important to choose the right address to build a photovoltaic system.
When selecting an address, users should try to avoid placing them in places and situations that are vulnerable to lightning strikes. So which locations and places are vulnerable to lightning strikes?
Lightning strikes often occur in areas where soil resistivity is small and soil resistivity changes significantly. Areas such as metal deposits, riverbeds, groundwater outlets, hillsides and rice fields, hillside and foothills, riversides, lakesides, seashores, low-lying areas, and high groundwater levels are places that are vulnerable to lightning strikes. Other isolated towers, chimneys, and other tall buildings (buildings) are also vulnerable to lightning strikes.
Second, the correct use of lightning rods in photovoltaic systems must be learned.
Sometimes we know that the location is important, but the actual installation environment can not be changed, or can not open a location and occasions vulnerable to lightning. Then here we need to take reasonable measures to prevent it. Professional photovoltaic system installers, when they do this, usually use different protective measures such as lightning rods, lightning protection strips, and lightning protection nets to protect the direct lightning strikes according to the site conditions, and adopt multiple uniformly laid down conductors. The lightning current is introduced into the ground. The diversion effect of multiple down conductors can reduce the lead voltage drop of the down conductor and other wiring methods to reduce the probability of lightning strike and reduce the risk of side impact. Here is a detail to pay attention to avoid lightning rod projections falling on the solar array.
Third, the equipment of the photovoltaic system is well grounded.
Regardless of whether it is a household or a centralized photovoltaic system, the equipment is always surrounded by metal. For example, the components have a metal frame, the inverter is a metal material, and the brackets, line tubes, etc. are all the same, which requires the equipment grounding resistance to be less than or equal to 4Ω. It is better to set the grounding body separately. The lightning rod (belt), down conductor, and grounding body installed in the photovoltaic system require that the grounding resistance is less than 10Ω, and the grounding body should also be installed.
I think PV systems do these preventive measures. Even if you visit your power station, Thunder will not have a great impact. But if you ignore the loss of lightning protection may be very heavy.
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