After the season when the grass grows and the warblers fly, the photovoltaic power stations we built in the courtyard and wasteland are threatened by weeds, especially the photovoltaic poverty alleviation power stations installed in the past few years, many of which are built in the open space. As soon as it arrives, "grass is taller than people", which seriously affects the power generation and threatens the safety of photovoltaic power plants.
So, what adverse effects do weeds have on photovoltaic power plants?
Hazard one:
Weeds block the component, and the component performance decreases. The weeds passing over the modules will produce shadows under the light, and the shadows will be reflected on the modules, reducing the amount of photovoltaic radiation and indirectly reducing the output current of the modules, resulting in a decline in the output performance of the modules and a reduction in power generation.
Hazard two:
Weeds block, easy to make the components have hot spot effect. The modules are shaded by weeds for a long time, and the shaded parts will be used as loads over time, consuming the energy generated by other solar cell modules with light. The shaded modules will heat up at this time, resulting in a hot spot effect. Long-term hot spots will irreversibly affect the performance of the modules and even cause the modules to burn out, thereby shortening the overall life of the power station and affecting the revenue of the power station.
Hidden danger three:
Dense weeds affect the heat dissipation of the device. The main equipment of the photovoltaic power station, the inverter and the combiner box will generate a certain amount of heat during the operation. If they are covered by dense weeds for a long time, the external heat dissipation of the equipment will be inhibited. If the heat cannot be dissipated for a long time, the equipment will be overheated. Fault. It is also worth mentioning that the summer climate is hot and the equipment temperature is too high to dissipate, and there is still a risk of fire.
Branch grass tips
Manual weeding
It is understood that the existing weeding methods are nothing more than two ways - artificial weeding and chemical weeding.
Some power stations use a combination of portable lawn mowers and manual mowing, but the disadvantage is that it consumes a lot of manpower and funds.
The use of chemical agents for weeding is generally the purchase of some agricultural herbicides by local agricultural dealers nearby, which can effectively control weeds.
animal weeding
Goats are stocked in the photovoltaic power station for weeding in the photovoltaic power station, and the cost is similar to that of manual weeding. However, it should be noted that the installation height of photovoltaic modules in this power station is 1.5m, and goats cannot jump on the modules. In addition, photovoltaic cables should be laid underground as much as possible, and protective covers should be installed on the ground.