Photovoltaic power plant integrated grounding system
Release time: 2024-07-31
Photovoltaic power plant integrated grounding system As an emerging energy source, photovoltaic power generation has the advantages of being pure green, pollution-free, and able to be seamlessly connected to the existing power transmission and transformation grid. my country is currently vigorously developing photovoltaic power generation, with strong support, and the prospects for promotion are very optimistic. Photovoltaic power generation is mostly located in the wilderness and suburbs, and is extremely vulnerable to lightning hazards; it occupies a huge area, so the supporting grounding network maintenance workload is huge; the supporting booster substation is actually a power substation, and the power substation grounding network is very important, so the grounding network of the photovoltaic power plant should be given enough attention. As an emerging energy source, photovoltaic power generation has the advantages of being pure green, pollution-free, and able to be seamlessly connected to the existing power transmission and transformation grid. my country is currently vigorously developing photovoltaic power generation, with strong support, and the prospects for promotion are very optimistic. Photovoltaic power generation is mostly located in the wilderness and suburbs, and is extremely vulnerable to lightning hazards; it occupies a huge area, so the supporting grounding network maintenance workload is huge; the supporting booster substation is actually a power substation, and the power substation grounding network is very important, so the grounding network of the photovoltaic power plant should be given enough attention. The grounding grid made of hot-dip galvanized steel is difficult to guarantee a service life of more than 10 years. Copper and copper-clad steel grounding materials can make the grounding grid life reach more than 30 to 50 years. The price of pure copper material is too high, and the strength is not as good as copper-clad steel material. From the comprehensive comparison of performance and price, copper-clad steel material is the best material choice for the grounding system of photovoltaic power plants. Grounding grid composition The grounding grid of photovoltaic power plants is mainly composed of photovoltaic power generation area grounding, inverter room grounding and lightning protection belt, booster station grounding, etc., and they are interconnected. Generally, a centralized grounding device is set at the inverter room grounding lead to discharge lightning current. The grounding layout method is buried at a depth of 0.6-0.8m and below the permafrost layer. They are all composed of horizontal grounding electrode + vertical grounding electrode + grounding lead, etc. The above materials are all made of copper-clad steel grounding materials, and the welding method is GWELD exothermic welding.
