Is the production slightly higher when arranged following the slope compared to the normal arrangement?

The author received a consultation: for a project in Guangxi, the yield (referring to the yield per kilowatt, the same below) of electricity generated by following the slope is surprisingly slightly higher than that when arranged directly facing south. After conducting Production calculations for two layout plans using Candela3D and PVsyst software, the Simulate results have verified the correctness of the conclusions. What exactly is the reason for that? The author has conducted an analysis on the actual terrain layout of the project, and the results are as follows: In the table above, the four normals highlighted in red account for nearly 70% of the total. Next, we will calculate the actual tilt and azimuth angles of the array for these four normals, using both due south and downslope arrangements, and employ PVsyst to compute the annual total radiation. It can be observed that for the aforementioned four orientations, when…

The new generation of arrays layout module for complex terrain projects has been launched

The previous issue of "Hill-shading analysis method for complex terrain" addressed the issue of selecting sunshine regions in complex terrains. However, how to arrange arrays as much as possible within a limited area while ensuring maximum production is a highly complex problem. We cannot simply consider this issue in terms of the front row not blocking the back row during a certain period of time (although this is a conventional approach, the result is insufficient land utilization and the plan is not economical). We need to consider many issues, such as: 1) Partial arrays are allowed to be obscured, allowing for a more compact array layout; 2) If some scattered arrays block the back row, even if they are not obscured by the front row, deleting them can make the arrangement of the back row more tidy; 3) Mutual obstruction and sequence of layout between adjacent areas (such as front…

Next-generation Hill-shading analysis method for complex terrain

For projects with complex terrain, the most crucial step when selecting an available area is to find areas that meet the sunlight conditions. The conventional method for sunshine filtering typically follows the principle of not being blocked by other mountains from 9 am to 3 pm throughout the year. When the arrangement capacity is insufficient, the time range will be shortened. There are the following issues with this analysis method: 1. It can only conduct preliminary quantitative analysis of direct radiation, but cannot analyze the scattering and reflection losses caused by mountain obstruction; 2. For complex terrain, the sunshine periods of the mountains are not symmetrical, making it difficult to handle; 3. It is not possible to Analyze the occlusion loss outside the specified time period. The new generation of Hill-shading analysis method directly targets the ultimate goal of Hill-shading analysis, which is to select the areas that receive the…

Discussion on the East-West Spacing of Photovoltaic Arrays in Mountainous Areas

The spacing between PV arrays in the E-W Direction, as the name suggests, is as shown in the figure below. It seems that there is no room for discussion, so it is often skipped. However, the actual layout process of a project in Complex terrain is not as straightforward as it seems. This is mainly due to the following two reasons: 1)The arrays are arranged according to the terrain, and as the length and width of the array's projection change, the shape of the Parallelogram also changes; 2)Traditional drawing still treats arrays as unchanging rectangles for layout. For the above item 1), to control the actual East-west spacing to a set value (such as 0.5 meters), it can be achieved through a step-by-step method. This is actually not difficult. Regarding the aforementioned point 2), it is actually the reason that complicates the issue. From a two-dimensional projection, the actual arrays…