Electric transmission is the process by which electricity is transported from generation plants to local utilities so it can be delivered to end-use consumers. Electric transmission in deregulated states is part of the electrical supply charges and is often measured in $/kW (see kW vs. kWh). Transmission line owners charge a certain tariff or rate to deliver electricity over their lines, which is oftentimes collected by retail energy suppliers. Electrical transmission is often confused with electrical delivery, which is solely managed by local utility companies. Electrical delivery takes place over locally-owned electrical lines, and not high-powered transmission lines.
Throughout the U.S. there are various electrical transmission operators who are responsible for managing the electrical transmission systems to ensure that there is always enough power supply to meet demand. In deregulated states, this role is often assigned to Independent System Operators, such as the NYISO in New York, or Regional Transmission Operators, such as PJM in the Mid-Atlantic states. In regulated states, public utility companies are often responsible for owning and managing transmission networks. Energy brokers help their customers understand transmission rates as they relate to their electric bills.