Quick-break setting simulation verification method for mixed-structure mine high-voltage power grid

The invention discloses a quick-break setting simulation verification method for a mixed-structure mine high-voltage power grid, and the method comprises the steps: calculating an incidence matrix TH, an incidence matrix NH and an incidence matrix G according to the connectivity of a single-direction graph; obtaining a branch node set T with the instantaneous quick-break fixed value being less than a fault current according to the incidence matrix NH and the incidence matrix G; obtaining a set X of all switches which need to be switched off because of a short-circuit fault according to the node set T, and switching off the corresponding switch according to the obtained set X, and carrying out the tripping operation. According to the characteristics of a power supply system of the mixed-structure mine high-voltage power grid, a corresponding network topology model is built, and the topology recognition of the mixed-structure mine high-voltage power grid can be completed conveniently. Based on the above, the set of switches which need to be switched off because of the short-circuit fault is obtained, so as to verify whether the current quick-break setting meet the requirements of reliability and selectivity or not, and achieve the purpose of quick-break setting simulation verification.