Transmission vs Distribution
Transmission and distribution are terms used commonly in connection with electricity. It is not just production that is important but how efficiently it is transmitted from the power plant to power sub stations and then finally to end consumers that makes up the entire system of generation to consumption. People commonly confuse between transmission and distribution and believe them to be synonyms but these terms are as different as chalk and cheese. This article will highlight the features of both transmission and distribution to make the concepts clear to the readers.
Transmission
Transmission refers to the process of carrying electricity that is produced by turbines in a power plant (whether thermal or hydro electric) to power sub stations that are located near populations. It is kept in mind to locate a sub station at a place that is strategically located so as to be able to supply electricity to as large a population as possible so that less money is spent in making sub stations. Thus transmission lines provide a medium for electricity being produced from power plants to near areas where it is to be utilized by the consumers. Transmission lines carry electricity at a very high voltage which is around 11000 volts and it is usually three phase power transmission.
Distribution
Distribution begins after electricity lands at sub stations that are created near populations. It is the process of carrying high voltage electricity to end consumers converting it into 220V to make it safe and efficient for use in homes, offices and industries. The conversion of high voltage into a voltage that can be used in homes is done through transformers. Also the lines carrying this electricity to consumers are thin in comparison to transmission lines. Electricity is supplied in single phase to end consumers so some get it from one phase coming from the power plant while others may be getting it from another phase coming from the power plant.
Difference Between Transmission and Distribution • Both transmission and distribution refer to movement of power after it has been generated at the power plant but whereas transmission is the movement of electricity from power plant to power sub stations near populations, distribution refers to carrying electricity from this sub station down to end consumers • Transmission is done in three phase whereas distribution is done in single phase • Transmission lines carry electricity at a very high voltage (11000V) whereas distribution lines carry it at low and safe levels (220V) • Electricity if brought down from high to low voltage using transformers
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Moh Mkb says
thanx
John Dow says
That’s a bit wrong.
Transmission lines carry energy from power stations to substations at VERY high voltages.
Distribution lines carry energy from substations to neighborhoods at HIGH voltages.
In more detail, using our local system as an example:
A power station burns natural gas to drive steam turbines, which drive generators, which output electric energy. Large transformers step that generated electric energy up to a very high voltage, sometimes in excess of 500,000 volts.
Transmission lines carry that very high voltage over very long distances, even many hundreds of miles. These lines are on very high towers to keep everyone and everything away from the very high voltages on them.
Transmission lines carry that energy to numerous substations, where large transformers step the very high voltage down again to high voltages that are more suitable and safer for use NEAR, but not IN, buildings. Here, our substation steps 640,000 volts down to 14,400 volts.
Distribution lines carry that 14,400 volt energy down streets to smaller transformers that are near buildings. In our neighborhood, one such transformer serves my house and the house next door, and it sits on the ground at the common corner of our two lots. It steps the 14,400 volts suppled to it down to 240 volts, which is then supplied to these two houses.
carlos says
who of the two gets paid better do u know
carlos says
who gets paid better the transmission lineman or the distribution lineman