Introducción de forma de soporte solar fotovoltaico común
Tiempo de liberación:
Apr 15,2024
Photovoltaic bracket is a support device designed for placing, installing and fixing photovoltaic modules in a photovoltaic system. The choice of photovoltaic bracket will affect the power generation, land cost and cost of photovoltaic power station, and then affect the economy of photovoltaic system. This paper gives a brief introduction to the common forms of photovoltaic brackets, and compares their characteristics, and also introduces some less mentioned forms of brackets.
Fixed support
The fixed bracket is a photovoltaic bracket with a fixed Angle. In the design of ground photovoltaic projects, pvsyst and other software is usually used to calculate the inclination Angle of photovoltaic modules to obtain the maximum amount of solar radiation in a year as the installation inclination Angle. If the project land is tight, the economic optimization can also be used as the goal to optimize the inclination Angle and the spacing between the front and back of the string. In mountain photovoltaic projects, because the mountain slope is more obvious, and the cluster in the phalanx may be more dispersed, the fixed bracket with a small footprint, less labor and lower failure rate also has advantages over other bracket types. Distributed photovoltaic roof installation, due to the difficulty of operation and maintenance, and limited area, most of the main fixed support or tile mode.
Fixed tilt adjustable bracket
El ángulo de altura del sol cambia con las estaciones, y el soporte fijo generalmente utiliza la mejor generación de energía anual, que no se puede ajustar según las estaciones. El ángulo de inclinación del soporte ajustable fijo se puede ajustar durante un número limitado de veces de acuerdo con la cantidad máxima de radiación solar obtenida por el módulo fotovoltaico en diferentes períodos de tiempo, generalmente ajuste puramente manual o ajuste manual con asistencia mecánica. El soporte ajustable fijo está limitado por los costos de mano de obra, y es más común para dos ajustes en un año, que se divide en ángulo de inclinación de verano y ángulo de inclinación de invierno, y el mes de ajuste específico debe determinarse de acuerdo con la cantidad de radiación total de la superficie inclinada bajo los dos ángulos de instalación. Los sistemas fotovoltaicos que utilizan soportes ajustables de inclinación ocupan un área de aproximadamente 1,1 a 1,3 veces la de los soportes fijos. El aumento anual de la generación de energía del sistema ajustable fijo es de aproximadamente el 5% en comparación con el del sistema de soporte fijo, y la cantidad de generación adicional será diferente de acuerdo con las condiciones límite, como el uso de la tierra.
Flat single-axis tracking bracket
A flat single-axis tracking bracket is a form of bracket that can track the sun's rotation around a horizontal axis, usually in a north-south direction. The common tracking Angle range is ±60°, and some products have a tracking Angle range of ±45°. The land area of the flat single-axis system is usually 1.1 to 1.3 times that of the fixed one, the power generation is increased by 8% to 15%, and the price is increased by 5% to 10%.
Inclined single-axis tracking bracket
A slanted single-axis tracking stand, where photovoltaic modules rotate around an inclined axis to track the sun for higher power generation. The footprint of the inclined single-axis system is usually 2 to 4 times that of the fixed one, the power generation is increased by 15% to 20%, and the price is increased by 10% to 15%.
Dual axis tracking bracket
The dual-axis tracking bracket can rotate in both east-west and north-south directions to track the sun's incident azimuth and altitude Angle throughout the day. The footprint of the two-axis tracking system is usually 2 to 4 times that of the fixed one, the power generation is increased by 25% to 30%, and the price is increased by more than 60%. However, the two-axis tracking system is more complex, so the mechanical structure is more, and the running stability is general.
Flexible support
Photovoltaic flexible support is a kind of large-span photovoltaic module support structure formed by prestressed flexible cable structure, the span of cable structure is usually between 20 meters to 40 meters, up to 100 meters. At the same time, the components can be 2 meters to 30 meters above the ground, with high headroom under the components, the number of pile foundation layout advantages. The photovoltaic module in the flexible bracket is generally installed with a small inclination Angle, usually 10°~15° is appropriate. At present, the actual commercial flexible support project capacity is usually the largest number of megawatts, and there is no large application project.
Flexible support is mainly applicable to scenarios such as mountain projects with large slope (such as more than 35°), fishing and light complementary projects with high clearance requirements. Sewage treatment plants, parking lots and other distributed photovoltaics with relatively high space requirements also have great application prospects.
Among the above common forms of support, fixed adjustable support and tracking support are more suitable for areas with strong direct radiation. In some low-latitude areas of our country, due to the advantage of electricity prices, tracking brackets also have more excellent performance than fixed brackets. Which kind of support is more suitable in different regions needs to be analyzed according to different projects. However, at present, according to the actual construction and operation of domestic projects, large base projects are more suitable for fixed support schemes, and the remaining several supports are less used in large base projects for various reasons.
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