Space debris impact risk assessment for space solar power station using geometric shadowing algorithm

Geometric shadowing calculation for on-orbit spacecraft is a critical step in the space debris risk assessment system. This paper proposes a method for geometric shadowing calculation of on-orbit spacecraft. The algorithm combines the advantages of the computer graphics Roberts algorithm and the projection line judgment method, forming a projection line determination algorithm with small errors and convenient calculation. The risk assessment results of this algorithm are similar to those of similar domestic and international software, with a maximum deviation of 4.78%. Based on this algorithm, a space debris risk assessment analysis was conducted for a cylindrical configuration Space Solar Power Station, analyzing the variation of its space debris impact risk with different orbital inclinations in geostationary orbit. The analysis results indicate that the forward-facing areas of the outer ring concentrator array and the inner core power generation array of the power station face greater threats from space debris, necessitating further space debris protection work.