Nowadays, many people use solar energy to generate electricity from their homes. Using photovoltaic power generation is not only clean and environmentally friendly, but also energy-saving electricity and electricity. We all know that photovoltaic power plants are high-quality, high-value, high-demand products. The correct method of use can not only ensure the power generation of the power station, but also keep it for a long time. Therefore, maintenance after the installation of the power station is particularly important. Let Xiaobian introduce how to systematically maintain solar PV modules.
1. The surface of the PV module should be kept clean. Wipe the PV module with a soft or clean cloth that is dry or damp. It is strictly forbidden to wipe the PV module with corrosive solvents or hard objects. The PV module should be cleaned with an irradiance of less than 200 W/m2. It is not advisable to use a liquid cleaning component that has a large temperature difference from the component.
2. PV modules should be inspected regularly. If the following problems are found, the PV modules should be adjusted or replaced immediately. Photovoltaic modules have glass pulverization, back plate burning, and obvious color change; there are bubbles in the photovoltaic module that form a communication channel with the edge of the module or any circuit; the junction box of the photovoltaic module is deformed, twisted, cracked or burned, and the terminal is not good. contact.
3. The live warning sign on the PV module must not be lost.
4, the use of metal frame photovoltaic components, the frame and bracket should be well combined, the contact resistance between the two is not more than 4Ω, the frame must be firmly grounded.
5. When working under the condition of no shadow blocking, the temperature difference of the outer surface of the same PV module (directly above the battery) should be less than 20 °C under the condition that the solar irradiance is above 500 W/m2 and the wind speed is not more than 2 m/s. Photovoltaic power plants with installed capacity greater than 50kWp shall be equipped with infrared thermal imaging cameras to detect temperature differences on the outer surface of photovoltaic modules.
6. Use a DC clamp-type ammeter to measure the input current of each PV module string connected to the same DC combiner box under the condition that the solar radiation intensity is basically the same, and the deviation should not exceed 5%.
7. All bolts, welds and brackets of the bracket should be firmly and reliably connected. The anti-corrosion coating on the surface should not crack or fall off. Otherwise, it should not be brushed in time.
9. For solar cell array brackets with polar axis automatic tracking system, it is necessary to regularly check whether the mechanical and electrical performance of the tracking system is normal.
10. Regularly check the metal bracket of the solar cell array for corrosion, and regularly carry out anti-corrosion treatment on the bracket. The square frame bracket should be well grounded.
11. During use, the photoelectric parameters and output power of the solar cell array should be checked regularly (for example, 1 to 2 months) to ensure the normal operation of the battery array.
12. During use, it is necessary to check the packaging and wiring joints of solar photovoltaic modules regularly (for example, 1 to 2 months). If it is found that the package is open, the battery is discolored, the joints are loose, the wire is disconnected, the corrosion is damaged, etc. Or replace it.
13. To keep the lighting surface of the solar photovoltaic module square clean, if there is dust, clean it with a clean wire tweezers. If the dirt cannot be cleaned, rinse with clean water and then wipe the water with a clean cloth. Never use a corrosive solvent or wipe with a hard object. In case of snow, clean it up in time.
Fttx-The Last Miles,Fttx - Last Mile Networking Solution,Last-Mile Otdr For Fttx Networks Integrates Opm,Last Mile Fttx Test
Huizhou Fibercan Industrial Co.Ltd , https://www.fibercan-network.com