The centralized ultra large scale energy storage power station(ULSESPS) and its control system have gradually developed into a cyber physical system(CPS). Information technologies and monitoring systems can not only enable the ULSESPS to cope with diversified scenes and meet different demands, but also bring a certain degree of safe operational risks. Therefore, reliability modeling and analysis of the ULSESPS are of great significance. Firstly, this paper proposes the cyber physical system model of the ULSEPS, and analyzes the interaction between physical side and information side. Then, the probabilistic mode of various information disturbances in the cyber system is modeled and analyzed, and the CPS reliability evaluation index of the ULSESPS is proposed. Finally, the non-sequential and sequential Monte Carlo method is used for cyber and physical layer components simulation respectively, and the influence of multi-information disturbance factors on CPS reliability of the ULSESPS is analyzed quantitatively. The effectiveness of the proposed model and method is verified by simulation examples, which can provide technology support on ultra large scale energy storage power station planning and operation.