Electric power transmission
bulk movement of electrical energy from a generating site to an electrical substation
Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. A long conductor used to facilitate such movement is called a transmission line. The interconnected transmission lines form a transmission network. In the power industry, electric power transmission is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution, even though power distribution is semantically a type of power transmission in common parlance. The combined transmission and distribution network is part of electricity delivery, known as the electrical grid.
Transmission lines transmit either alternating current (AC) or direct current (DC). To increase the efficiency of long-distance electric power transmission, the voltage is often increased for transmission, then reduced for local distribution. This is because higher voltages corresponds to lower currents and lower losses caused by such currents. The AC voltage level is often changed with transformers.
A wide area synchronous grid, known as an interconnection in North America, directly connects generators delivering AC power with the same relative frequency to many consumers.
Begin with the source’s own compact description: “Electric power transmission” is bulk movement of electrical energy from a generating site to an electrical substation. The dossier treats that line as a proposition to test through Electric, power and transmission, not as a finished interpretation.
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The phrase “bulk movement of electrical energy from a generating site to an electrical substation” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Chronology, provenance and viewpoint should be read together before a broad social or political interpretation is accepted. The source revision retrieved here is dated Aug 7, 2026. The linked authority identifier is Q200928. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Electric power transmission” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.