Reliability evaluation of security and stability control device based on Monte Carlo and Fault Tree method

The reliability evaluation of the security and stability control device (SSCD) is of great significance to the stable operation of power system. In this paper, the SSP series SSCD is taken as an example. The hardware system is divided into several independent sub-modules according to its function and logical structure, of which the failure modes of its refusing operation and misoperation are taken as the base events of the fault tree. Markov method and fault tree method are combined to construct reliability evaluation model of SSCD. Finally, the Monte Carlo (MC) method is used for simulating the dynamic process of the model, and the simulation results verify the effectiveness of the reliability evaluation model.