What is substation used for?


Question from: Mr. Danthon Pellegrino | Last updated: December 2, 2021

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Substations perform one or more of the following functions: interconnect multiple HV power lines at the same voltage level, creating a network node (via the busbars); … convert the voltage from AC to DC and vice versa (conversion substations).

What is meant by medium voltage?

Very high voltage: over 150 kV. High voltage: between 30 and 150 kV. Medium voltage: between 1 and 30 kV. Low voltage: less than 1 kV.

What are transformer stations used for?

Part of a network consisting of the complex of equipment used to transfer electricity between networks at different voltages.

What function do electrical power stations typically perform?

Features. A 3 kV dc SSE plant has the function of transforming and routing the electricity supplied by Terna on the primary grids of the Italian Railway Network (RFI). An SSE is made up of: incoming high voltage primary line (HV);

How is an electrical station defined?

Electric substations (often abbreviated SSE) are located near a production plant, at the point of delivery to the end user and at the interconnection points between the lines: they therefore constitute the nodes of the electricity transmission network.

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How does an electrical substation work?

How electrical substations work

The former raise the voltage power of the line from average values ​​to high values, while the latter, receiving the energy through a system of transmission power lines, reduce the voltage again.

Why does the transmission of electricity over large distances take place with high voltage lines?

Direct Current and Alternating Current – Hints

When the current leaves the high voltage line to enter our homes, a transformer lowers its voltage and raises its intensity. … Thanks to the use of transformers, the AC lines allowed the transport of energy over very large distances.

Why is high voltage current carried in wind farms?

The aim is to bring energy from production power plants to places of use, cities and industrial areas, which can be tens or hundreds of kilometers away. … Thanks to the transmission network, it is therefore possible to reallocate resources by reducing energy waste.

How much electricity does Italy need?

Italy, according to the energy balance of 2018 – the last date of which we have the official aggregate publication – had an electricity requirement of 321.4TWh which was met for 86.3% thanks to national production (277 , 5TWh) and for the remainder through imports from abroad (…

Who manages the Medium Voltage?

The distributor manages the last part of the electricity network that reaches our homes and is the owner of the meters connected to it.

What tension comes in the houses?

has the purpose of supplying electricity in the form of the desired voltage, in domestic networks it is usually a nominal voltage of 230 V in alternating form with an operating frequency of 50Hz (read 50 Hertz).

How is voltage measured?

Voltage: definition and characteristics

The unit of measurement for voltage is the Volt, indicated with the letter V and measured with the voltmeter, an instrument often integrated into an electrical tester which takes its name from the physicist Alessandro Volta, inventor of the first chemical battery.

How much electricity do we consume?

An average family of 3-4 people annually consumes approximately: 3,000 kWh of electricity; 6,000 thermal kWh for space heating; 3,000 thermal kWh for sanitary water heating.

What types of energy does Italy use?

The production of electricity in Italy is increasingly deriving from renewable sources, i.e. from the exploitation of geothermal, hydroelectric, wind, biomass and solar energy.

How do we produce electricity?

The production of electricity takes place, as well as with nuclear power plants (see nuclear energy) by exploiting non-renewable energy sources such as oil, coal and natural gas and to a lesser extent using the so-called renewable energy sources: geothermal energy, hydroelectric energy, solar or …

How does high voltage work?

High voltage is defined as an electrical voltage greater than tens of thousands of V. The CEI has defined a scale of normal values ​​to be used in electrical transmission equipment / networks, which are between 60 kV and 150 kV (more rarely 220 kV) for high voltage and 380 kV for very high voltage.

How is high voltage electricity transported?

A complex network infrastructure allows electricity to be transported to the end user, through primary substations (which transform high voltage electricity into medium voltage electricity), secondary substations (from medium voltage to low voltage) and transformers.

How is the electric current carried?

From the power stations, the power lines reach the sorting and transformation stations, which provide for the distribution of electricity throughout the area.

What current flows in the pylons?

Description. The constitution and characteristics of the power lines are highly variable, mainly as a function of the operating voltage and whether the transmission takes place in direct current or alternating current.

What are the voltage levels at which the transmission and distribution of electrical energy takes place?

General This network generally includes medium voltage power lines (between 1 and 35 kV) and low voltage lines (between 50 and 1,000 V), HV / MV transformation plants (primary substations), transformers on poles or medium voltage electrical substations. (secondary substations), disconnectors and switches, measuring instruments.

Why is alternating current better than direct current?

with alternating current the energy travels better thanks to the transformers; it costs less because it needs fewer processes to be disseminated; it can also be used at high voltage; it can be used for more complex circuits.

What changes between transmission and distribution in electrical systems?

Note that the transmission line carries energy or electricity in the three-phase power system, which is used in industry and by large consumers. The distribution system, on the other hand, usually requires a single-phase power supply system to transport electricity.

How does an electrical system work?

Electricity, produced by a generator, is spent in an electrical circuit to make a device work: for example, a light bulb. The energy expended is electrical potential energy, carried by the charges, which is transformed into other forms of energy (heat and light in the case of the light bulb).

Who is the manager of the electricity grid?

Terna – Rete Elettrica Nazionale is an operator that manages electricity transmission grids based in Rome, Italy. Through Terna Rete Italia, it manages the National Transmission Grid with 74723 km of high voltage power lines.

How much electricity does Milan consume?

In the province of Milan there are total primary energy consumptions which amount to 12.294 Mtoe in the provincial territory, which means a primary energy consumption of 3.26 toe / inhabitant.


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