Terrestrial Laser Scanning for Heliostat Surface Shape Determination and Canting Errors Correction

Abstract

Canting errors, resulting from misalignments of heliostat facets, pose a significant challenge to solar power plants' efficiency. Traditional methods of alignment are time-consuming and costly. This paper presents an innovative approach utilizing Terrestrial Laser Scanning (TLS) technology for precise and fast heliostat alignment. The method involves point cloud processing, paraboloid fitting, and heliostat facet’s screw adjustments. A case study at Thémis solar tower demonstrates the effectiveness, resulting in a significant improvement in optical quality and power output.

Keywords

• Solar Field
• Heliostats
• Canting Errors
• Terrestrial Laser Scanning
• LiDAR