For the difficulty of wind power grid-connected, a power system optimization dispatching method using the concentrating solar power (CSP) plant to promote wind power accommodation is proposed, considering the dispatch-ability of the thermal storage system and the capacity of the electric heating device in the CSP plant. The method analyzes the internal simplified model of the CSP plant and the short time scale identification method of the wind power ramping event based on a kind of CSP-Wind system structure. Furthermore, the operating characteristics and constraints of various units are considered with the goal of the lowest system comprehensive cost, to establish a CSP-Wind optimization model for dispatching power system optimally. The method was simulated and verified on the IEEE-RTS24 node system by using MATLAB optimization toolbox. The results demonstrate that the participation of the CSP plant can alleviate the pressure of the fast output regulation of the thermal power unit in the power system, and reduce the curtailment of wind power and wind power ramping events while ensuring the economical operation of the power system when the high proportion of wind power is connected to the grid.