Electric power transmission
Karady, George G. Department of Electrical Engineering, Arizona State University, Tempe, Arizona.
Last reviewed:January 2020
- Power quality
- Overhead Alternating-Current Transmission
- Mechanical performance
- Electrical performance
- Electric field
- Magnetic field
- Lightning protection
- Switching surges
- Telephone interference
- Underground and Submarine Power Transmission
- Cable construction
- Submarine cables
- Cable parameters
- Related Primary Literature
- Additional Reading
The transport of generator-produced electric energy to loads. An electric power transmission system interconnects generators and loads and generally provides multiple paths among them. Multiple paths increase system reliability because the failure of one line does not cause a system failure. Most transmission lines operate with three-phase alternating current (ac). The standard frequency in North America is 60 Hz; in Europe, 50 Hz. The three-phase system has three sets of phase conductors, one to four conductors per phase, and system voltage is defined as the root-mean-square voltage between any two of the phases. Long-distance energy transmission occasionally uses high-voltage direct-current (dc) lines. See also: Alternating current; Direct current; Direct-current transmission
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