Overhead transmission lines are an integral part of the electrical grid system. They are used to transfer electricity from one location to another and can be seen running along roads, highways, and sometimes over bodies of water. Overhead transmission lines have been around for more than a century, with the first built in 1882 by Thomas Edison. Since then, they have become increasingly important as our electrical grids grow larger and more complex.
The most common type of overhead transmission line is made up of three phases: high voltage alternating current (HVAC), medium voltage alternating current (MVAC), and low voltage direct current (LVDC). The HVAC is usually carried on large towers span hundreds or even thousands of miles across different countries or states. At the same time, MVACs take power between local utility substations at lower voltages than HVACs do. Finally, LVDC is used for shorter distances, such as inside cities where it’s not feasible to use long spans like those found with HV AC systems. All these components work together so that electricity can be delivered safely from its source down into homes and businesses without interruption or loss due to resistance along its journey through wires strung above ground level.
Overall, overhead transmission lines are vital in delivering energy efficiently across long distances, making them essential parts of any modern electric grid system. Furthermore, their ability to carry multiple types of currents allows us to access various sources of electricity such as solar farms, wind turbines, hydroelectric dams, nuclear plants, etc., thus allowing us to benefit from renewable energy sources while still maintaining a reliable supply of traditional forms of power generation.