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[popular science] snow, cleaning photovoltaic power generation system it?

Time:2017-08-253Publisher:Browse:18second

1, after the need to clean up the photovoltaic power generation system? How to deal with the winter snow melt PV module after icing? Can step on cleaning the components in it?
If there is a heavy snow component accumulation of snow is the need to clean, can use soft goods push snow, be careful not to scratch the glass. Components are load-bearing, but they can not be cleaned on the components, which can cause components to be cracked or damaged and affect the life of components. It is generally advised not to wait until the snow is too thick to clean up, so as to avoid excessive freezing of components.
2, winter weather when the electricity shortage?
The power generation of PV system is really affected by temperature, the direct factors are radiation intensity and sunshine duration, and the working temperature of solar cell module. In winter, radiation intensity will be weak, sunshine duration will be short, the general power generation will be less than summer, this is also a very normal phenomenon. But because the distributed PV system is connected to the grid, as long as the grid has power, there will be no power shortage or power outages.
3, after installation, if the continuous rain or haze, photovoltaic power generation system will work? Will the power shortage or power failure?
The photovoltaic battery component can also power in a weak light, but due to continuous rain or fog and haze, solar irradiance is low, the working voltage of the photovoltaic system if not up to the starting voltage of the inverter, then the system will not work. Integration of distributed photovoltaic power generation system and the distribution network is running in parallel, when distributed photovoltaic power generation system can not meet the load demand or because of the overcast instead of working, the electric network will automatically add over, lack of power and the power problem does not exist
4, how to reduce the maintenance cost of photovoltaic power generation system?
Recommend the choice of good reputation in the market, good after-sales service of photovoltaic products. Qualified products can reduce the rate of failure, users should strictly abide by the system manuals, regular cleaning and maintenance of the system.
5, how to deal with the late maintenance of the system, how long maintenance, and how to maintain?
According to the instructions of the supplier need to regularly check the parts for maintenance, system maintenance work is the main component of rainwater wipe larger areas, generally do not need to manually clean, non rainy season about 1 months to clean a. The amount of dust in large area can increase the number of appropriate wipe heavy snowfall area, heavy snow removal will be timely, to avoid uneven shading impact of power generation and melting snow, clean up trees or other debris shielding components in a timely manner.
6, what are the major factors that lead to the decline in efficiency and loss of PV systems?
The efficiency of photovoltaic power generation system affected by the outside loss, including occlusion, ash layer, component attenuation, temperature influence, component matching, MPPT precision, inverter efficiency, transformer efficiency, DC and AC line loss, as shown below:
The effect of each factor on efficiency is also different. In the early stage of the project, attention should be paid to the optimization design of the system, and some measures should be taken to reduce the influence of dust and other shielding on the system during the operation of the project.
7, can photovoltaic power generation systems protect against hail damage?
Qualified components in grid connected photovoltaic system must be through the positive maximum static load (wind load, snow load) 5400pa, the maximum static load (wind load) on the back of 2400pa and 25mm in diameter hail to the speed of 23m/s hit the strict test. Therefore, hail will not cause harm to photovoltaic power generation system.
8, after installation, if the continuous rain or haze, photovoltaic power generation system will work? Will the power shortage or power failure?
The photovoltaic battery component can also power in a weak light, but due to continuous rain or fog and haze, solar irradiance is low, the working voltage of the photovoltaic system if not up to the starting voltage of the inverter, then the system will not work.
Integration of distributed photovoltaic power generation system and the distribution network is running in parallel, when distributed photovoltaic power generation system can not meet the load demand or because of the overcast instead of working, the electric network will automatically add over, lack of power and the power problem does not exist.
9, photovoltaic power generation system for users of electromagnetic radiation hazards?
Photovoltaic power generation system is based on photovoltaic effect principle, the conversion of solar energy to electricity, pollution-free, non radiation. Inverters, power distribution cabinets and other electronic devices will be tested by EMC (electromagnetic compatibility), so there is no harm to the human body.
10, PV systems have noise hazards?
Photovoltaic power generation system is the conversion of solar energy to electricity, there will be no noise impact, the inverter noise index is not higher than 65 decibels, and there will be no noise hazards.
11, what are the currently approved photovoltaic systems and product testing and quality certification organizations in China?
The certification bodies mainly include Beijing authentication center, China Quality Certification Center and China building materials inspection and certification group.
The detection mechanism mainly include: Chinese Academy of solar photovoltaic systems and wind power system quality inspection center, the national solar photovoltaic products quality supervision and inspection center, eighteenth Research Institute of China Electronic Technology Group Corporation, the 811st Research Institute of China Aerospace Science and Technology Corporation, Shenzhen electronic product quality testing center, Yangzhou optoelectronic products testing center, the national building materials industry of solar photovoltaic (electric) product quality supervision test center.