The Space Solar Power Satellite (SSPS) is a promising project to solve the energy crisis on earth. In this paper, a secondary concentrator design of an updated SSPS-OMEGA concept is proposed aiming at the problems existing in original SSPS-OMEGA concept, such as high power transmission through power brush, thermal management of the photovoltaic (PV) cell arrays and special requirements for the concentrator film brought by the inside placed transmitting antenna. Firstly, the updated concept with a secondary concentrator, a disc PV cell arrays and outside placed transmitting antenna is illustrated and main parts of it are described. Secondly, a design methodology of the secondary concentrator is presented. The characteristics of spherical concentrator are simply described. The generatrix geometry of the secondary concentrator is described using Bézier curve, and the performances of optics and energy density distribution on PV cell arrays are evaluated using the Monte Carlo Ray Tracing method. After that, a mathematical optimization model is established and the Particle Swarm optimization is used to obtain better configuration of secondary concentrator, solar energy collection performance and energy density distribution on PV cell arrays. Finally, the optimal generatrix geometry of secondary concentrator and energy density distribution under different orders of Bézier curve are investigated, the result shows that the effective solar energy collection and solar energy collection can be up to 81.14% and 87.06% respectively when the order of Bézier curve is 5. Moreover, a further energy density distribution optimization is conducted and the relative non-uniformity index of 0.4 is realized.

太空太阳能卫星（SSPS）是解决地球能源危机的有前途的项目。在本文中，针对原始SSPS-OMEGA概念中存在的问题，例如通过电刷的高功率传输，光伏（PV）电池阵列的热管理以及特殊问题，提出了更新的SSPS-OMEGA概念的二次集中器设计。放置在内部的发射天线对聚光膜的要求。首先，示出了具有次级集中器，盘状PV电池阵列和外部放置的发射天线的更新概念，并描述了其主要部分。其次，提出了二次浓缩器的设计方法。简单描述了球形集中器的特性。使用贝塞尔曲线描述了二次聚光器的母线几何形状，并使用蒙特卡洛射线追踪法评估了光伏电池阵列的光学性能和能量密度分布。此后，建立数学优化模型，并使用粒子群优化算法获得更好的二次聚光器配置，太阳能收集性能和光伏电池阵列上的能量密度分布。最后，研究了二次聚光器的最佳母线几何形状和不同阶贝塞尔曲线的能量密度分布，结果表明，当贝塞尔曲线阶数较高时，有效太阳能收集和太阳能收集可分别达到81.14％和87.06％。曲线是5。此外，