The transmission system in a power system refers to the network of high-voltage lines, substations, transformers, and other equipment that are responsible for transporting electrical power from power plants to distribution systems or directly to large consumers (like industries).
Here’s how it works:
- Power Generation: Electricity is generated at power plants, usually at a low voltage.
- Step-up Transformation: The voltage is then increased (stepped up) by transformers to a much higher voltage, usually ranging from 110 kV (kilovolts) to 765 kV. This higher voltage is more efficient for long-distance travel because it reduces energy losses during transmission.
- Transmission Lines: The electricity is carried over long distances through transmission lines. These lines are supported by tall transmission towers to prevent them from touching the ground. The higher the voltage, the less current is needed for the same power, which helps minimize losses.
- Step-down Transformation: When the power reaches its destination, usually near population centers, it goes through substations where the voltage is reduced (stepped down) to a safer and usable level for distribution.
- Distribution System: The lower-voltage electricity is then sent to homes, businesses, and industries for everyday use.
The transmission system is essential because it allows electricity generated in remote power plants (often far from where it’s needed) to be delivered to areas of high demand, like cities and factories, efficiently.
To summarize:
- Transmission system = High-voltage lines + transformers + substations
- Purpose = Transport power over long distances with minimal loss.
Does that help clarify things?