Nowadays, there are more and more people installing PV power plants. When installing PV power plants, there are some things to pay special attention to. What problems should be paid attention to when using PV power plants? What is the specific situation? Let's learn together.
What problems should I pay attention to when using PV power plants?
On December 1, 2017, due to the launch of a public welfare inspection activity for household photovoltaic power plants nationwide, the “physical examination” of household photovoltaics covered 21 provinces nationwide and accumulated 3,165 inspection power stations. On January 31, the country's first domestic PV power plant inspection report was officially released. Let us uncover the “unspeakable hidden” behind the 3,165 household PV power plants.
52.6% of power stations have occlusion problems
The occlusion problem has always been a common problem. Although in the design of the power station, the design engineer will avoid it as much as possible according to the actual situation, but in the actual installation and use, always avoid various uncontrollable problems. It may be that the perfect power station on the network gives everyone an illusion, but don't ignore this ubiquitous problem.
First of all, when designing, avoid as much as possible, instead of occluding, it is better to install less, reasonable design is very important; second, in the process of use, it is necessary to regularly check whether there is new occlusion around the power station and deal with it in time, such as miscellaneous Grass, etc. Thirdly, do not use photovoltaic panels to dry the objects during use, which may cause hot spots.
59.2% of power stations have excessive dust accumulation
Dust accumulation is actually a relatively common problem, and the operation and maintenance problem that we can handle is also the problem of dust accumulation. The difference between the north and the south of the dust is obvious. Generally, the dust in the north is much more serious than in the south, which is related to the climate. Don't think that dust is a small matter. You must wait until the power station is very dirty, because it is directly related to the amount of power generated. Power plants that are not frequently dusted are at least 3% less than those that are often dusted. 3%*25 years is still terrible~
It is necessary to clean up the dust in a timely manner. It is not necessary to specify how often it should be cleaned. When the power station is dirty, it should be cleaned up in time. When cleaning the dust in the power station, be sure to pay attention to its own safety and take safety measures. The power station must not be able to step on the solar mounting structure components, nor can it be cleaned with sharp objects, which should cause damage to the power station.
40% power plant installation solar mounting bracket angle is not the best in the local area
The best angle is best because it represents the highest amount of electricity generated. Then in the actual power plant installation design, because of the solar panel mounting structure of the roof surface, sometimes compromises have to be made, such as tile roofing.
The installation of the flat roof power station is sure to adopt the best angle. Never give up the best angle for installing a few plates. Finally, consider losing the structure. The tile roof should consider the solar mounting structure of the house, and you should not blindly seek the best angle. Deviate from the scope of reasonable design.
23% of the power plant DC string and the inverter match is unreasonable
The same MPPT accesses more than two DC strings, and the input voltage and current of each channel must maintain a high consistency, otherwise it will cause a large parallel loss. This is why the component model and the number of blocks of each string of the two-way string are the same, and the component angles are consistent.
25.3% of power stations have insufficient weight
The weight of the power station is to maintain the weight of the power station under special conditions such as heavy wind and heavy rain, such as cement piers. If the cement piers cut corners and the weight is insufficient, the power station will be easily blown down by the wind, causing damage to the power station and even endangering the lives of others.
The weight design should be based on the local meteorological data for 50 years, and must be strictly in accordance with the design and construction.
15% power station bracket accessories have problems
In addition to the weight of the bracket, there are problems with the bracket accessories, such as the rust of the grounding screw and the improper use of the clamp, which are enough to become a safety hazard of the power station.
29% power plant inverter installation is not standardized
Generally, the first-line inverter brands use certain waterproof and dustproof functions, so it is not uncommon for common inverters to be installed outdoors. However, the point to pay attention to the installation of the inverter is to do a good space for heat dissipation. Because the inverter is responsible for the energy conversion station of the power station, the process will inevitably generate a large amount of heat. If the heat is not timely, it will cause damage to the components and thus affect the impact. Power generation and power station safety.
34% of power station monitoring is not used reasonably
Why should a photovoltaic power station have a monitoring system? On the one hand, it is to be able to check the power generation of the power station in time, so that it has a bottom in mind; on the other hand, it is to ensure the safe and efficient operation of the power station, and there is a problem in the power station, generally an inverter. The monitoring system first detects that if the feedback can be given to the owner in time, the maintenance of the power station can be obtained in time to avoid unnecessary losses.