Singapore uses Thermal Power Stations for the generation
of electricity. Due to the fact that Singapore is a large island, the power
plants are located near the sea. (This will be explained later.)
Below
is a Diagram of the Basic Operation of a Thermal Power Station. 
-We
used coals as fuel for the generation of heat energy. As the water in the Boiler
evaporated due to the intense heat, it becomes high-pressurized steams.
-And
the steams are passing through a conduit (there is a turbine at the other end of
the tunnel), it forces its way through the Turbine, thus rotating the Turbine.
(As the steams are high-pressurized, the Turbine will rotate very fast.)
-The
Turbine is connected to a Generator via a coupler. As the Turbine is rotating
(from the force of the steams), electrical energy is being produced.
-After
the steams have passed through the turbine, it enters a Condenser. The Condenser
has got a cooling agent (namely seawater) and the steam will go through the
cooling agent via a pipe. The steam thus changes back to its liquid form and
returns to the Boiler.
-And
the whole process repeats.