Shadow obstruction is one of the core issues in the layout of photovoltaic arrays, and it is also one of the important indicators for evaluating the results of photovoltaic array layout. Candela3D enables multi-dimensional visualization and analysis of site-specific shading conditions, providing critical references for layout adjustments and design optimization of solar fields.
1. Display the shadows in the photovoltaic array field in real-time
During any other operations, it can simultaneously display the real-time 3D shadows at a specified moment, supporting fixed, adjustable inclination, and horizontal single-axis (including inverse tracking).
2. When moving, copying, or deleting arrays, the array shadows should be displayed in real-time
Unlike Figure 1, the shadow shown here: 1) is the shadow of the array when it is lowered to a height of 0 meters above the ground; 2) represents the shadow range line during a specific time period (from 9 a.m. to 3 p.m. on the winter solstice day).
3. Statistics on occlusion
Including other arrays, obstructions, and the obstruction of the array by mountains.
Supports fixed, adjustable tilt, and horizontal single-axis brackets (supports inverse tracking).
4. Remove the obscuring array
Only consider the mutual occlusion between arrays.
Only fixed type and adjustable inclination (limited to winter) are supported.
Differences from 3: Both A and B are blocked, with A blocking B; if A is selected, B will not be selected.
5. Draw and export the shadow range lines of the array
6. Annual shadow occlusion loss of the array
Unlike the aforementioned shading analysis, there are three differences:
1) The previous analysis was only qualitative, and shading ultimately affects the power generation of arrays/strings. Therefore, it is necessary to calculate the annual shadow loss percentage for each array, as well as the total annual radiation on the array surface after considering the shadow shading loss;
2) The previous analysis only calculated the shading conditions at certain moments, whereas here the calculation is for the entire year;
3) The previous analysis was only effective for direct radiation, whereas here the calculation refers to the calculation principle of PVsyst, considering the effects of direct, scattered, and reflected radiation.
For direct radiation shadow blockage, referring to the calculation principle of PVsyst, the calculation can be divided into:
Linearity: The loss of direct radiation shadow is linearly related to the area of obstruction;
By string: If a certain string is partially shaded (specifically, by more than 1%), then the direct radiation contribution of that string to power generation is 0.
By utilizing the aforementioned tools effectively, we can efficiently filter out arrays that fail to meet the specified criteria, thereby ensuring the rationality of the final design.
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