What is the role of a substation in the electrical grid, and what are the different types?

2025-08-11

Answer: A substation is a critical hub in the power grid that transforms voltage levels, switches circuits, and protects the system from faults. The main types of substations are classified by their function:

  • Step-up substations: located at power plants, they increase voltage for long-distance transmission.

  • Step-down substations: reduce voltage from transmission to distribution levels.

  • Distribution substations: further lower the voltage for final delivery to homes and businesses.

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