Abstract: To cope with the challenges of the frequency stability that have been brought about by grid-connected operation of renewable energy sources, and alleviate the frequency regulation pressure of the automatic generation control (AGC) unit that has been imposed by its short-term output fluctuation, an optimal capacity configuration rolling model is established in this paper. Firstly, considering the Solar Field warm-up mode principle of the CSP plant is considered, a Solar Field warm-up model is established through abstraction and simplification. Then, by using multi-sequential rolling programming approach, a rolling optimization model of thermal storage capacity in CSP plant is proposed, based on the perspective strategy. Unlike the traditional strategy, the prospective strategy, emphatically considering the influence of short-term output fluctuations of the hybrid system during the look-ahead period on the TES heat charging and releasing decisions at the current moment, can achieve the optimal state of the heat charging and releasing. Finally, case studies are carried out to analyze the effectiveness of the rolling model and strategy. Results indicate that, compared with the traditional optimization strategy, the prospective strategy is superior in suppressing maximumlly the short-term fluctuation of Wind-CSP Hybrid Power Generation System by rationally configuring the thermal energy storage capacity parameter.