Space Solar Power Station (SSPS) is a kind of space electrical power system which converts space solar energy into electrical power and transmits it to Earth ground receiving station, the energy from which is a kind of clean and renewable resource. Compared to others, the SSPS with concentrator represents the developing direction of SPSS in the future, among which, Integrated Symmetrical Concentrated system (ISC) proposed by NASA has the advantage of high collecting sunlight efficiency. However, the addition of concentrator system results in complicated mechanism and is more difficult to control in motion than before; therefore, it is particularly important to plan the effective and realizable motion trajectory when travels on its orbit in the space. For the purpose, a method of trajectory planning for this kind of system is proposed in this paper to make concentrator to realize real-time solar tracking by means of the cooperative rotation of transverse truss and concentrator on the Geostationary Orbit (GEO), and the simulation demonstrates its validation and feasibility. Finally, two improved measures especially solution 2 are presented to mitigate the overheating as the result of nonuniformity of the flux distribution on PV array caused by rotation of concentrator. (C) 2015 Elsevier Ltd. All rights reserved.