Research on the load-shedding strategy of isolated power grids for regional power grids including wind-hydro power under low-frequency and low-voltage conditions

Abstract

Abstract After more and more wind farms and hydropower plants are connected to the regional power grid, the wind farms and their low-voltage ride-through capabilities of the power grid become increasingly complex. In order to ensure the stable operation of the isolated power grids with wind-hydro power, it is necessary to implement appropriate load-shedding strategies under low-frequency and low-voltage conditions. In this article, we focus on the study of strategies for the operation of district power grids, including wind hydro power, under isolated operation conditions. By combining theoretical analysis with practical considerations, load-shedding strategies are proposed for district power grids under low-frequency and low-voltage. To demonstrate its effectiveness, a simulation model that includes one wind farm and five hydropower plants was conducted to achieve positive results.