As an emerging energy source, photovoltaic power generation has the advantages of being pure green, pollution-free, and can be seamlessly connected to the existing power transmission and transformation grid. my country is currently vigorously developing photovoltaic power generation, with strong support and very optimistic promotion prospects. Photovoltaic power generation is mostly located in the wilderness and outskirts, and is extremely vulnerable to lightning hazards; it covers a huge area, so the maintenance of the supporting grounding grid is huge; the supporting booster substation is actually a power substation, and the grounding grid of the power substation is very important, so photovoltaic power generation The grounding grid of the field should be given sufficient attention.
As an emerging energy source, photovoltaic power generation has the advantages of being pure green, pollution-free, and can be seamlessly connected to the existing power transmission and transformation grid. my country is currently vigorously developing photovoltaic power generation, with strong support and very optimistic promotion prospects. Photovoltaic power generation is mostly located in the wilderness and outskirts, and is extremely vulnerable to lightning hazards; it covers a huge area, so the maintenance of the supporting grounding grid is huge; the supporting booster substation is actually a power substation, and the grounding grid of the power substation is very important, so photovoltaic power generation The grounding grid of the field should be given sufficient attention.
Grounding grids made of hot-dip galvanized steel cannot guarantee a service life of more than 10 years. Copper and copper-clad steel grounding materials can extend the service life of the grounding grid to more than 30 to 50 years. Pure copper materials are too expensive and not as strong as copper-clad steel materials. , from a comprehensive comparison of performance and price, copper-clad steel materials are the best material choice for photovoltaic farm grounding systems.
2. Grounding network composition
The photovoltaic power plant grounding network is mainly composed of photovoltaic power generation area grounding, inverter room grounding and lightning protection belts, booster station grounding, etc., and are connected to each other. Generally, a centralized grounding device is set up at the inverter room grounding down conductor for leakage. Lightning current. The grounding arrangements are all buried to a depth of 0.6-0.8m and below the permafrost layer. They are all composed of horizontal ground electrode + vertical ground electrode + ground lead wire, etc. The above materials are all made of copper-clad steel grounding materials, and the welding method is GWELD exothermic welding.