Here is your app-ready article for Transmission Lines, written in the same clean, structured format as your other topics. Perfect for your “Power System” category.
Transmission Lines
This diagram shows how high-voltage transmission lines carry electrical power from the power station to cities, factories, and residential areas.
After electricity is generated, it travels long distances through transmission lines to reach different load centers.
Using high voltage reduces energy loss and improves efficiency during long-distance power transfer.
Key Components:
- Power Station: Generates electricity at moderate voltage levels.
- Step-Up Transformer: Increases the voltage (e.g., from 11 kV to 132 kV or 275 kV) for long-distance transmission to reduce power loss.
- Grid System Transmission: High-voltage lines supported by tall towers that carry electricity across cities and regions.
- Step-Down Transformer: Lowers the voltage at substations so it becomes suitable for distribution.
- Distribution Lines: Carry lower-voltage electricity to homes, factories, and businesses.
Working Principle:
- Electricity is generated at the power station at medium voltage.
- The step-up transformer raises the voltage to very high levels for efficient long-distance transport.
- High-voltage electricity travels through transmission towers and conductors across large distances.
- At a substation, a step-down transformer reduces the voltage to safer levels.
- Electricity is then sent through distribution lines to buildings, industries, and homes.
High voltage is essential because it reduces current, which minimizes I²R losses, improving efficiency over long distances.
⚡ Tip:
Transmission lines are designed to withstand lightning, strong winds, and long spans. Insulators and grounding systems protect the network from faults.
