Which voltage configuration is likely necessary for black start generators?

Black start generators are vital for restoring power in the event of a total system blackout. These generators need to start up independently, without relying on external electrical supply, and provide the necessary voltage and frequency to support the restoration of the grid.

The choice indicating that a voltage configuration greater than 20 MVA is likely necessary reflects that black start generators typically require a significant capacity to handle the initial load and support the energization of the transmission and distribution systems. Generators with this level of capacity can provide the robust output needed for starting larger power plants and bringing them online.

Smaller generators, like those under 5 MVA or in the 10 MVA range, might not possess the capacity to handle the larger loads that could be required in a black start scenario. Similarly, while aggregated systems exceeding 100 MVA can contribute to black start capabilities, the question focuses on the requirement for individual generators, making the higher capacity choice the appropriate one.