Analysis risk of dynamic stability of power network with multiple small motor groups equivalent to each other

Abstract

The BPA data of the regional power grid is usually only used for the detailed modeling of the 110kV grid connected substation, and the 35kV and the following grid station generally use the equivalent parameters of the equivalent capacity of the unit, and then be incorporated into the 110kV power grid for simulation analysis. In order to analyze the accuracy of power system stability simulation after equivalence, a detailed model of the grid connected small hydropower units with 35kV and the following is built. The results show that, using a plurality of small hydropower units group area grid equivalence, dynamic stability analysis of differences, there are regional power grid internal oscillation mode equivalent and cannot reflect the regional oscillation modes in small turbine.