Types of Long Transmission lines

There are many types of long transmission lines based on many factors :

1. HVDC Transmission Lines
2. AC Transmission Lines
3. Overhead Transmission Lines
4. HVAC Transmission Lines
5. EHV Transmission Lines

HVDC (High Voltage Direct Current) Transmission Lines

HVDC transmission lines works on direct current(DC current),from them the power losses also reduces. Some important points are

• It has low transmission losses
• It increases power transfer capacity
• It helps in voltage stability and control
• It helps in reducing environmental impact
• It has a Bi-Directional power flow

AC (Alternating Current) Transmission Lines

As per the name they mainly work on Alternating current(AC current) to make electric power. Some important points are:

• It operates at high voltage levels to minimize losses
• They work on three-phase system
• They require a reactive power compensation to maintain voltage stability
• They may experience corona losses and also radio interference
• They require long transformer substations at both step up and step down voltage levels for long transmission line

Overhead Transmission Lines

They are the oldest method of transmitting electricity from long distances. Some important points are

• They have different conductor configuration.
• The conductor material used here is made of aluminum or aluminum alloy.
• Their tower design are made from steel and lattice towers.
• Insulators are used to support the conductors.
• They need regular inspection and maintenance.

HVAC (High Voltage Alternating Current) Transmission Lines

HVAC transmission lines carry high voltage alternating current. Some Important points are

• They operate using alternating current where the current flow periodically reverses.
• They operate at high voltage levels to minimize transmission losses.
• They work on three-phase system.
• They require transformer substations at both ends to step up voltage and step down voltage.

EHV (Extra High Voltage) Transmission Lines

They operate above 345 KV. They are used for highest voltage level power transmission in electrical field . Some important points are

• They are designed to lower the transmission losses.
• They can transmit large amounts of power for long distances.
• They may have environmental impacts like nature harm and more generation of electromagnetic fields.
• They require more safety measurements due to high voltage levels.

A long transmission line is an electrical transmission line that extends over a good-sized distance, typically carrying energy from one part of the grid to another. A long transmission line is an important part of the electrical system as it is made by using simple methods and is easy to understand.

In this article, we will be going through the long transmission line in a Power System, We will start our Article with the Definition of the Long Transmission Line, Then we will go through its Derivation and See its Different Types, At last, we will conclude our Article with its Advantages, Disadvantages and Some FAQs.