What factors should be considered in the selection of photovoltaic brackets?

30 Aug , 2022

Under the situation that the land for new energy is becoming more and more tight, with the development of photovoltaic power generation technology,the importance of comprehensive selection of supports in the future construction of photovoltaic power plants is becoming more and more prominent.The selection requirements of photovoltaic supports are different according to the different construction land environment. The land for photovoltaic power stations is also moving towards slopes, sandy land and even the sea, posing new challenges to the selection of photovoltaic supports.


So, what factors should be considered in the selection of photovoltaic support? What are the new features of new technologies such as tracking support and flexible support in the promotion and application?


The bidding rules shall be optimized according to the geographical conditions, power restrictions, etc.

In the process of bracket selection, factors such as topography, geological conditions, and land area should be fully considered. For example, the flat uniaxial bracket has certain requirements on the slope of the terrain. In areas with a slope greater than 10 degrees, it is usually not suitable to install the flat uniaxial bracket. In this regard, the fixed bracket has a wider range of applications. For another example, if an adjustable bracket is used, the location of the power station should also be considered, whether it is easy for operation and maintenance personnel to reach it, and whether it is convenient for subsequent adjustment operations. When conditions permit, it is recommended to use advanced technologies such as fixed adjustable, horizontal single-axis tracking, and elevation-adjustable dual-axis tracking to increase power generation.

In addition to the objective natural conditions, factors such as various taxes and fees, environmental protection requirements and power rationing of the power station are also important indicators that need to be referred to in the comprehensive selection process. In many cases, the increase in power generation does not necessarily increase the comprehensive income. According to the actual situation, whether the power station is facing the problem of power curtailment, the ratio of power curtailment, the implementation of guaranteed purchase hours, etc. should be taken into consideration, and the investment return and economy of the bracket products should be comprehensively calculated.

It should also be considered according to the actual situation of the project. The specific bidding and optimization rules also greatly affect the stent selection.


Tracking bracket market expansion, technical details need to be optimized and upgraded

From the perspective of improving power generation, compared with the traditional fixed bracket, the tracking bracket can make the photovoltaic modules face the best angle of sunlight exposure through real-time adjustment, thereby improving the power generation efficiency. At present, with the continuous advancement of the construction of the large-scale wind and solar base, the market demand for tracking brackets has also begun to expand.

As the market scale continues to expand, the tracking stent still needs technical optimization and innovation in many aspects. For example, on some mountains and slopes, the universal joint of the main shaft is one of the more common points of failure, and this is where efforts need to be made in terms of technical upgrades. In addition, the compatibility of large-format components and the optimized design of double-sided components are all problems that need to be solved in the follow-up development of tracking brackets.


The flexible bracket is suitable for complex terrain, and the standard specification needs to be improved

Thanks to the terrain conditions of desert, Gobi, and desert, the requirements for the installation slope and the operating environment under the components are not strict during the bracket selection process of the large base project.

The biggest feature of the flexible support is that it has a large span, high headroom, and sufficient space under the module, which is conducive to the development of ‘photovoltaic +’ projects. The flexible support can span complex terrain, and is very suitable for photovoltaic installations in fish ponds, complex hillsides, sewage plants, tidal flats, canals and other places.

However, limited by technical characteristics, there are also challenges in the practical application of flexible stents. In view of the meteorological conditions that the power station may face, due to the small stiffness of the flexible components, the most critical issue is to suppress wind vibration. In this regard, necessary wind resistance measures such as adding ground anchors and wind-resistant cable trusses need to be taken. In the design process, wind tunnel experiments are often used to verify the stability of the structural system. In terms of design, the structural analysis of flexible supports is relatively complex, with many influencing factors, and there are currently no relevant national design codes and technical standards. These are the problems that need to be solved in the future development of flexible stents.