Based on the actual isolated power grid with high energy consumption load in a certain area

the simulation studies are conducted in the real-time digital simulation platform. The security and stability control strategy is analyzed under different operation mode. The analysis results point out that power imbalance still exists in the isolated power system after the security and stability control device acts successfully under the extreme conditions. A control method to eliminate the power imbalance based on the voltage sensitivity analysis is proposed. The simulation results verify the effectiveness of the proposed control method.