In a power system

when extreme events occur

such as ice storm

large scale blackouts may be unavoidable. Such small probability but high risk events have huge impact on power systems. Most resilience research in power systems only considers faults on the physical side

which would lead to overly idealistic results. This paper proposes a two-stage cyber-physical resilience enhancement method considering energy storage (ES) systems. The first stage calculates optimal planning of ES systems

and the second stage assesses resilience and enhancement of ES systems during the disaster. In the proposed model

cyber faults indirectly damage the system by disabling monitoring and control function of control center. As a result

when detection and response process of physical faults are blocked by cyber failures

serious load shedding occurs. Such a cyber-physical coupling mechanism of fault

response

restoration process is demonstrated in the modified IEEE Reliable Test System-79 (RTS-79). Simulation results show compared with the physical-only system

the cyber-physical system has a more accurate but degraded resilient performance. Besides

ES systems setting at proper place effectively enhance resilience of the cyber-physical transmission system with less load Shedding.