Reliability analysis of security and stability control system with typical structure in power grids

The security and stability control system (SSCS) is the second line of defense for prevention of security breach and control of power systems in China. With the development of smart grid technologies, it has been becoming more complex with an increasing trend of reliability requirements. In this paper, a typical application of SSCS in the power grid and its optimized design for ensuring its correct action are introduced. The Markov process model is developed to evaluate the availability of the proposed SSCS. The concept and algorithm of integrity for the SSCS are proposed with the consideration of equipment availability and functional reliability. Combined with the conclusion of the integrity calculation, useful suggestions for the design of SSCS are provided.