Case Analysis Of Wind Shock Resistance Of PV Mount

Case Background:

According to the video of the photovoltaic modules being blown up and down by the strong wind, it can be seen that the photovoltaic modules swayed violently under the strong wind. Is this wind power or solar power?

Case analysis of wind and shock resistance of photovoltaic supports

Case Cause Analysis：

Analysis 1: The original design of the tracking system should be H-type. The cost of H-type is higher than that of C-type, but the strength is higher. In order to save cost, tracking manufacturers use C-type regardless of quality.

Remarks: For this analysis, it is obvious that this structural scheme is unreasonable and has nothing to do with the column form. This is a problem of aeroelasticity. Even if a higher-strength H-type is used, the result will be the same. As long as the design is in place, the C-type column can be used, and the H should also need to select enough models to ensure the strength.

Analysis 2: There is no damper installed on the photovoltaic support.

Analysis 3: Structural problem, itself is a movable mechanism, and a support rod should be added.

Analysis 4: The power plant should still be under construction, and I didn't expect to encounter such a strong wind.

……Other reasons？

The Necessity of Dynamic Mechanical Load Testing of Photovoltaic Supports

The most important part of the acceptance of photovoltaic power plant construction is whether the wind resistance can meet the standard, and the key to measure the wind resistance of photovoltaic power plants is determined by the photovoltaic support.

According to IEC61215 requirements, PV modules are required to undergo mechanical load testing, the purpose of which is to test the module's ability to withstand wind, snow, static pressure and ice loads. The so-called dynamic mechanical load refers to the shaking of the front and rear surfaces of the photovoltaic module under the action of strong wind, which will cause the module to sway back and forth under the action of strong wind, which will cause the module to be subjected to alternating pressure in positive and negative directions, thereby accelerating material fatigue, which in turn causes the battery. The failure phenomenon of fragile parts such as chips and bus bars.

ICE61215

The dynamic mechanical load test usually involves applying a positive and negative pressure cycle of 1000Pa on the front of the module, 3 cycles per minute, a total of 1000 times.

GF PV damper

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