Preventive control of successive failures in extreme weather for power system resilience enhancement

Successive failure propagating through a power system, typically caused by extreme weather such as storm and lightning, can cause blackouts by means of a variety of processes. To address this issue, this paper proposes preventive control for successive failures of power system to mitigate the consequences of successive failures in extreme weather. First, based on the Poisson process theory, the authors model the successive failure propagation, and present the confidence interval estimation for the time interval between successive failures. Then, a failure pre-control methodology that quantifies the grid regulating ability and actions is developed to make decisions for system operators on mitigating overloads of transmission lines. Furthermore, a systematic pre-control framework for successive failures is first proposed to detect latent risks, eliminate predictable consequential outages, and secure power system stability. Results from IEEE-9 bus and IEEE-39 bus standard systems as well as a real-world system show the feasibility and effectiveness of the proposed method. The proposed preventive control framework can provide a systematic pre-control action scheme for system operators, and realize enhancement of stability and resilience to power system failures.