Abstract: Advanced medium/small-sized gas turbines have relatively higher turbine exhaust temperature, while the matched bottom power cycles generally in the form of single pressure or dual pressure are often incompetent for efficient and flexible power conversion from turbine exhaust heat. In order to improve the efficiency and flexibility of the gas-steam combined cycle (GTCC) power system based on the above-mentioned gas turbines, recuperative control (GTCC-RC) was proposed for adjusting the power ratio of the topping cycle to the bottom cycle at overall partial loads. Taking a 50MW gas turbine as an example, based on the conventional reference gas-steam combined cycle system, a GTCC-RC system was designed and the part-load performance was analyzed from the viewpoints of exergy loss and thermal efficiency; and the load-control strategies were proposed. The case study shows that the GTCC-RC improves the exergy efficiency of gas turbines. GTCC fuel input decreases with the increase of recuperative ratio. Recuperative control enhances the efficiency and flexibility of the GTCC case system. In comparison with the reference system without recuperator, the depth of peak shaving relatively increases by 6.51% and the GTCC thermal efficiency relatively improves by up to 6.47% in the proposed GTCC-RC system.