Analysis of the contribution of relay protection systems to the reliability of electrical primary equipment based on comprehensive consideration

With the growth of social demand for electric energy, the power system is becoming more and more important, and the reliability requirements are also higher and higher. The relay protection system, which is used to protect primary equipment, must be updated in time. The current relay protection reliability research is mainly to evaluate the reliability of the relay protection system itself, basically without quantitative analysis of the impact of relay protection on the reliability of primary equipment. In the reliability evaluation of large power grid, it is necessary to evaluate the impact of relay protection on the reliability of primary equipment, and adopt corresponding measures to improve the reliability of primary equipment in power grid.