Generation and transmission cooperatives
(G&Ts), like Great River Energy, operate power generating
facilities. At a steam generating plant, the fuel (coal,
nuclear or biomass) heats water to make steam and drive a
turbine. In a combustion turbine, the fuel (gas or oil) is
burned and the hot gas drives a turbine. Wind hydro and solar
are other forms of energy producers.
High-Voltage
Transmission Lines
Transformers at the generating plant increase
the voltage up to a transmission voltage (69 kV, 115 kV,
230 kV, 500 kV, 765 kV), so it can travel long distances
over high-voltage transmission lines. G&Ts operate these
lines, which carry the electric energy from the generating
stations to the places where electricity is used.
TRANSMISSION SUBSTATION
Transformers reduce the electric energy down to a lower
voltage (69 kV, 34 kV) making it suitable for high-volume
delivery over short distances.
LOCAL DISTRIBUTION SUBSTATION
Transformers reduce the electric energy down to a lower
voltage (69 kV, 34 kV) making it suitable for high-volume
delivery over short distances.
Large Industrial User
Most industries need 2,400 to 4,160 volts to run heavy
machinery. They usually have their own substation
at the facility.
Distribution
Lines
Lines belonging to local electric co-ops carry electricity
to transformers that reduce power levels to 120/240 or 120/208
volts for use in schools, farms, small businesses and homes.
