Electrical Power Conditioning
Project, pictures and data of dam of ITAIPU
|Each year ITAPU generates 75 TWh of
electricity (and avoids 67.5 million tons of carbondioxide emissions
- compared to coal power plants). This electricity has to be transported to the areas of
consumption and adapted to the local grid. Due to the existence of two frequencies, 50 Hz
and 60 Hz, two independent power conditioning systems were installed.
To increase the voltage of the generating units (because the transmission losses at higher voltages are lower), Single-Phase Transformer groups with nine banks of three single-phase 18 kV to 525 kV transformators (plus 1 reserve) rated 825 MVA for 50 Hz and 9 banks of 3 single-phase 18-525 kV transformators (plus 1 reserve) rated 768 MVA for 60 Hz were specified.
Considering that during the first years of operation of ITAIPU Parauay shall deliver to Brazil most of the power generated at 50 Hz to which it is entitled (for which it shall receive finacial compensation), and therefore the ferquencies in Brazil and Paraguay are different, it was decided to build for Brazil a composite transmisson system in EHV-AC (Extra High Voltage - Alternating current) for the 6300 MW at 60 Hz and in HV-DC (High Voltage - Direct current) for about 6000 MW of the 50 Hz part.
The HV-DC-system at FURNAS has a voltage of ± 500 kV, and is converted back into AC at Ibiuna near Sao Paulo, where most of the electricity is consumed.
The EHV-AC-system works at a voltage of 750 kV at transports the electrical power generated by the 60 Hz units by an 891 km transmission system, formed by three lines, to the Sao Paulo metropolitan area.
The electrical power of ITAIPU generated by the 50 Hz units and used in Paraguay (2-4 % of the total amount) is inserted into the Paraguayan grid by three 220 kV AC lines, conditioned through the "Right Bank Substation", located 2.5 kms from the ITAIPU powerhouse on Parauguayan territory.
In order to attract more tourists from the nearby waterfalls of Igaicu the project will be made more accessable with an equivalent infrastructure (public transport, hotels, recreation areas, tours etc.).
Its worth to visit this "Wonder of the World of this Century" !