A thermal power plant is a device or installation for converting the heat energy of burning fuel (coal, oil, gas, or fissioning uranium) into mechanical work which is usually used to turn an electrical generator.
(A thermal power plant; is; a device or installation) (mechanical work; to turn; an electrical generator) (mechanical work; is used; to turn an electrical generator; T:usually)
A thermal power plant mechanical work mechanical work
is to turn is used
a device or installation
an electrical generator
to turn an electrical generator T:usually