Electroenergetic installations

Philosophy requires staff and those who come in contact with it to consider the economic implications and effects on global warming.

An energy system is a set of electroenergetic installations, organized together as part for the production, transmission and distribution of electricity in a given territory.

Customers Power supply is not made directly but through the power plants of the National Power System - SEN. This network consists of a closed circuit in which the central energy debit and consumers absorb energy flow.

Transmission and distribution of electricity are needed as intermediate links for transmission of electricity from power plants to load centers and distribution to consumer handsets.

Energy can not be storedand therefore must be consumed immediately. To be as economical electricity transmission over long distances is at very high voltages.

Transmission and distribution of electricity represent elements sources to electricity consumers. Consists of a set of overhead and underground lines connected by transformers arranged in stations or substations.

The network includes:

• Lifting power stations - which raises the voltage produced by the generator (6-24kV) to the value of 110KV or 220KV
• High voltage overhead lines - including the three steel-aluminum conductors which carry electricity long distances.
• Stations voltage step-down–the voltage descend the voltage at a certain level: from 110 kV or 220 kV to 35 kV and from 35kV or 6 kV to 400/230V
• Medium voltage and low voltage underground electric lines-consisting of underground cables carrying energy from the medium voltage stations (located on the outskirts of human settlements) to medium voltage consumers or the transformer PT
• Medium voltage and low voltage overhead lines

These projects meet the requirements of transport and distribution facilities:

• Ensuring continuity of supply to consumers
• Operational safety
• Providing quality parameters electricity supplied to consumers
• Economic efficiency
• Requirements for environmental protection

After nominal voltage electrical networks can be:

• Low voltage LV- up to 1000V.
• Medium voltage MT-1-35KV;
• High-voltage IT-35-400KV
• Very high voltage 400KVFIT.

After destination, electricity grids are:

• of transport;
• of distribution;
• grid usage;

Electrical network configuration determines their division:

• radial networks;
• mesh network;
• complex mesh network.