Research on voltage-inducting cascading trips of large-scale new energy in centralized system

The rapid growth of new energy generation in China today is presenting new challenges for the stability of power grid. Based on the mechanism of voltage-inducting cascading trips of large-scale new energy in centralized system, this paper firstly proposes the definition of trip-off path to describe the detailed process of the failure, and builds the model of trip-off path searching and risk evaluation system. Furthermore, combined with the exiting control approaches, a hierarchical control strategy based on path blocking under multi-scenario is given out to prevent the cascading trip-off failure at different stages. Finally the strategy has been well applied in practical power system of Northwestern China and proved to be effective.