Power transmission lines, what they are, the purpose they serve.

Electrical power plants use step up transformers to increase the voltage of the power for the purpose of transmitting that power to the users (you and me).

High voltage is necessary to transmit electricity over long distances. The voltage can be 138,000 volts, or 69,000 volts, depending on how far it has to travel.

Once the power reaches the area of use, it’s routed to a substation. The substation uses step down transformers to reduce the volt for distribution to you and me. The transformer on the utility pole by our house does the rest.

Transmission lines carry the transmission voltage to the substations from the power plant. Utility poles carry the distribution voltage from the substation to our homes.

This video shows what transmission lines look like, and gives a little insight of how many utility poles per mile there may be.

It’s my goal to document the number of utility poles and existing structures in one rural county of Illinois that could be used to mount small wind generators and solar panels.

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