Abstract With the introduction of photovoltaic subsidized electricity prices, photovoltaic power plants are getting hotter and hotter. However, the reporter learned that the quality of China's photovoltaic power plants is worrying and there are multiple hidden dangers. Wan Lin, former deputy director of Beijing Certification and Certification Center, has many years of experience in the acceptance of photovoltaic projects. He is deeply impressed by this: &l...
With the introduction of photovoltaic subsidized electricity prices, photovoltaic power plants are getting hotter and hotter. However, the reporter learned that the quality of China's photovoltaic power plants is worrying and there are multiple hidden dangers. Wan Lin, former deputy director of Beijing Certification and Certification Center, has many years of experience in PV project acceptance. He is deeply impressed by this: “Seeing too much negative information. The process of PV power plant construction includes site selection, construction design, product supervision. Construction training, operation and maintenance, etc. From the initial feasibility study report to the lack of uniform standards for design, construction, operation and maintenance, it can be said that it is very strange."
The life span of photovoltaic power plants is 25 years. However, many photovoltaic power plants have been put into operation and the accidents continue. Many hidden dangers of spontaneous combustion, flood, corrosion and explosion have not been paid attention to and solved.
It is understood that natural environmental factors often have a greater impact on the quality of the project. For example, in the permafrost regions of northeastern Inner Mongolia, the deformation of the scaffold is caused by frozen soil or alpine problems; in the arid desert areas such as Xinjiang, Inner Mongolia, Qinghai, Gansu, etc., due to lack of water and wind erosion, the foundation of the power station is difficult to stabilize; there are winter and rainy seasons. Factors such as the heat and heat, the impact on the quality of photovoltaic power station construction is also very serious.
“The roofs of photovoltaic power plants in eastern China have been overturned. Why? Because of the feasibility study, climate factors have not been considered. The design of the power station is too rough. For example, the Golmud area in Qinghai is a micro-corrosive environment, is it all power stations? Both design and manufacturing have taken this into account?" Wan Lin said.
Gao Jiqing, president of Trina Solar Energy Systems, said that at present, domestic large-scale photovoltaic power generation projects are still in the exploration stage in terms of quality assurance system. The reporter learned that in order to catch up with the state subsidies, some PV power plant project construction managers not only did the feasibility study report, but also blindly pursued the project schedule to relax or even neglect the project quality, which eventually led to quality accidents. For example, a 200mw power station in the upper reaches of the Yellow River was once devastated by the flood.
According to industry insiders, in addition to the lack of standards and rough design, there is another reason for the quality of the power station: the quality of the construction personnel. Due to the lack of qualification requirements for construction personnel, most front-line employees have insufficient experience in project construction, technical guidance, and quality control, and lack the ability to solve technical quality problems on site. In order to save costs, some project owners are not strict with the quality of key components, resulting in irreparable consequences. For example, the bracket is not treated with anti-corrosion treatment, and only a layer of paint is simply applied; the cable does not consider thermal expansion and contraction, and the quality of the inverter is not so good. Problems such as shading and hot spots in the operation of photovoltaic power plants will seriously affect the photoelectric conversion efficiency and service life of the components.
In this regard, Wan Lin lamented: "Siemens products have not decayed for decades, and some domestic products have a 20% decay in 5 years or even 1 year. To do photovoltaic power plants must have a commitment and a sense of mission, can not engage in speculation for temporary interests, This is not only a waste, but also irresponsible for future generations."
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