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Brief Analysis Of Safety Of Photovoltaic Float Bracket
May 11, 2018

With the development of the photovoltaic industry, the land used for the construction of photovoltaic power plants is becoming increasingly scarce. At the same time, in view of the issues concerning the acceptance, transmission, and distribution of photovoltaic power generation, various types of photovoltaic power generation have emerged in the industry, which are different from traditional ones. The surface water photovoltaic power station (ie, Yuguang Photoelectric Complementary Power Station) has also seen initial signs of floating systems. In 2017, several large-scale floating surface water projects have been completed in China. The HDPE floating bodies used in photovoltaics are mainly used in this paper. A brief introduction to the buoyancy support is also provided for its safety requirements.

The floating power station mainly considers the consumption of power grids in the area where it is located, and at the same time it has built hydroelectric power transmission medium- and high-voltage transmission equipment around the reservoir, which can effectively reduce access costs. At the same time, from the construction point of view, conventional surface power plants need to drive support piles into the bottom of the water. For deeper water depths, it is difficult to achieve this method. Therefore, floating methods are used, and the impact of water depth on installation difficulty is less.

For a photovoltaic power plant composed of HDPE floating bodies, the floating body of this type mainly includes the following parts: a main floating body, an aisle floating body, a component connection member, and an anchoring system. The main floating body is used for fixing components, and the aisle floating body is used for the main floating body. connect them. There is no rigid connection between this type of float.

For the HDPE type floating body, the main production method is blow molding. That is, using the shaping mold, the floating body is blow-molded at one time. From the perspective of safety, attention needs to be paid to the following aspects:

1 weather resistance

As the HDPE floating body will be used for outdoor water for a long time, its weather resistance will directly affect the safety of the entire photovoltaic power plant. For this purpose, it is recommended to conduct specific aging tests on the floating body, including the hygrothermal aging test and the UV aging test. The environmental parameters can refer to the specific standards of the corresponding items in IEC 61215, and compare the tensile fracture stress retention rate of the product before and after the experiment. The retention rate can refer to the specific provisions in GB/T 1040.2.

2 basic performance

The basic performance of the floating body mainly includes the following aspects:

1) The buoyancy of the floating body can be calculated based on the size and weight of the components carried by the pontoon

2) Tensile fracture stress retention rate, refer to the specific requirements in GB/T 1040.2

3) Airtightness, to ensure that the floating body will not hesitate in the process of using the heat barrier under the condition of shrinkage

4) Fire performance, refer to the specific requirements of GB/T 2408

3 environment-friendly

The floating body will be directly in the water body, which should ensure that it does not affect the water environment. This part can refer to the relevant contents of the IEC62321 standard and carry out relevant inspection and verification of the floating body material.