Integrated modeling of space solar power systems

Abstract

This paper presents an approach for modeling space solar power system architectures, integrating both economic and technical parameters for all space and ground-based system elements. Key elements of the approach are an integrated architecture assessment model that is used to conduct architectural analysis, a data dictionary that defines all technical and economic parameters and detailed analyses that are conducted external to the integrated model for specific architectural elements. The overall architecture of the space solar power system is composed of eight specific elements including both ground and space segments. Key parameters are identified for each element including variables that are input by the user as well as dependent variables that are calculated by the model. For each element, parameters are grouped into four categories including engineering and operations related technical parameters, and recurring and nonrecurring cost parameters. The integrated model allows the user to gain insights into the viability of the entire space solar power system through outputs such as internal rate of return, net present value, average duty cycle for use of on-orbit assets, and total nonrecurring investment cost. The user can also conduct sensitivity analyses to understand those technologies that have the greatest impact, the markets that provide the greatest opportunity, and the systems which offer the greatest potential.