Toward Controlled Islanding for Enhancing Power Grid Resilience Considering Frequency Stability Constraints

This paper develops a controlled network partitioning model to improve power grid resilience under catastrophic events. The proposed remedial scheme relies on a mixed integer linear programming formulation which aims at minimizing the overall load shedding. The main original salient feature of the model is the inclusion of frequency stability constraints, derived using linearized swing equations, in each resulted island after partitioning process. These discretized system frequency constraints further consider the contribution of primary reserve by governor-equipped generators. Another important original feature of the model is the use of linearized real/reactive power flow equations to satisfy the power balance of each island. According to the slow coherency concept, a linear formulation is utilized to locate the coherent generators in the same island. The efficiency and accuracy of the proposed approach has been demonstrated and validated by dynamic simulation using the IEEE 118-bus test system.