What is a black start in electrical system?

A black start refers to the process of restoring a power grid to operation after a complete shutdown, without relying on external power sources. This process typically involves using small, independent generators or hydroelectric plants that can start up autonomously. Black start capabilities are essential for ensuring the resilience of the electrical system, allowing it to gradually rebuild and synchronize larger power plants back into the grid. This process is crucial for minimizing downtime and restoring electricity to affected areas efficiently.