Which methods may be used to verify that a restoration plan accomplishes its intended function?

• A. Documentation review only
• B. Simulation only
• C. Analysis of actual events, steady-state and dynamic simulations, or testing
• D. No verification required

Answer: (C)

Verifying that a restoration plan accomplishes its intended function requires a thorough validation of both how the plan should work and how it will work in practice. Analyzing actual events from past outages provides real-world evidence of how the system responded and whether the planned actions would have produced the desired result under real constraints. Steady-state simulations confirm that, under normal operating conditions, the planned actions lead to acceptable operating points and resource utilization. Dynamic simulations go further by showing how the system transitions during restoration steps—how voltages, frequencies, and power flows respond, how islands form and reconnect, and whether the timing and sequencing of actions keep the system stable. Testing, whether through tabletop exercises or field tests, validates that operators can execute the procedures, meet timing requirements, and coordinate communications effectively in practice.

Relying on documentation alone cannot prove functional effectiveness, and relying on simulation alone cannot prove that procedures can be executed correctly in the real world. Combining these methods provides comprehensive verification that the plan will perform as intended.