High voltage transmission lines

What Is the Typical Voltage for Power Lines ? Why do power companies use high voltage transmission lines? What is the need of extra high voltage transmission lines? Why do transmission lines traveled in high voltage? Most transmission lines are high - voltage three-phase alternating current (AC), although single phase AC is sometimes used in railway electrification systems. High - voltage direct-current (HVDC) technology is used for greater efficiency over very long distances (typically hundreds of miles).

Very high-voltage transmission lines may have two ground conductors. These are either at the outermost ends of the highest cross beam, at two V-shaped mast points, or at a separate cross arm. In some cases, a large industrial customer may receive electricity directly from overhead transmission lines.

You might have noticed huge towers supporting the high voltage transmission lines in your locality. These high voltage lines transmit electric power generated at power stations which are situated at remote locations. Power stations are built away from the cities where natural resources are available and are transmitted to the load centers. It is because of line power loss reduction purpose. Practically long distant transmission line resistance is comparatively more than medium and short transmission line.

The high voltage is required to reduce the amount of energy lost during the distance. Unlike other energy sources such as natural gas, electricity can’t be stored when it is not used. I am living near high voltage power lines. ELF exposure due to proximity to a high voltage power line depends upon things. A frequently asked question is, “How close is too close to high voltage power lines , and what is a safe distance?

When assessing danger, distance is all-important. High voltage direct current (HVDC) transmission lines are either monopolar or bipolar systems. With bipolar systems a conductor arrangement with one conductor on each side of the pylon is used. For single-pole HVDC transmission with ground return, pylons with only one conductor cable can be used. From coast to coast, electricity travels via high voltage transmission lines in order to supply power to our homes.

The need for a high transmission voltage occurs when a large amount of power has to be transmitted over a long distance. For example, it allows more efficient bulk power transfer over long. Electromagnetic radiation from high voltage power lines is something that can affect the health of people in urban and rural communities. Strong, artificial EMFs that radiate from power lines can scramble and interfere with your body’s natural EMF, affecting everything from your sleep cycles and stress levels to your immune response and DNA! China has started up the world’s longest and most-powerful ultra- high voltage power line from its far northwest to the heavily populated east.

The 100-kV direct-current Changji-to-Guquan project stretches 2km (0miles), the nation’s biggest electricity distributor said in a statement Wednesday. NYPA operates one-third of the major transmission lines in New York State, helping to form the backbone of the statewide grid for electric power distribution. Our 4miles of transmission lines carry power from generation sources to substation distribution centers, where they feed the lines that connect to individual customers. However, in the United States, there are no federal standards limiting electromagnetic fields from power lines and other similar sources. Some states set standards for the width of right-of-ways under high-voltage transmission lines because of the potential for electric shock.

Whereas those that distribute electricity around smaller areas usually have lower voltages. Electric current is sent through the power grid via these high-voltage transmission lines to a substation in your area. Health Risks Associated with Living Near High - Voltage Power Lines.

Gary Zeman, Sc CHP.