What are the three main functions of a substation?

The three main functions of a substation are to change voltage, connect/disconnect equipment, and control power flow.

Changing voltage is crucial because substations step up or step down voltage levels for efficient power transmission. High voltage is typically used for long-distance transmission to minimize losses, and substations adjust these levels for distribution to consumers.

Connecting and disconnecting equipment is a key function that allows operators to safely manage the electrical grid. This ensures that necessary maintenance and repairs can be performed without disrupting the entire system, as well as providing flexibility in managing power distribution.

Controlling power flow is essential for maintaining stability in the electrical grid. Substations help regulate the distribution of electricity based on demand and prevent overloads, which ensures a steady and reliable supply of power to consumers.

Each of these functions plays a crucial role in the reliability and efficiency of the electrical power system, which is why this option accurately reflects the primary purposes of a substation.