A combined cycle powered railway locomotive is a fancy train that uses electricity to move. It's like when you push your toy train on the tracks, but instead of you pushing it, the train has a special machine that makes it go really fast.
The locomotive has two types of engines - a big one that runs on gas and a smaller one that makes electricity. The big engine is called a gas turbine, and it's like a big fan that spins really fast. When it spins, it creates energy that makes the smaller engine work.
The smaller engine is called a generator, and it takes the energy from the gas turbine and turns it into electricity. This electricity is then used to power the train's electric motor, which makes the train move down the track.
Because the locomotive has two engines working together, it can use both gas and electricity to make it go really fast. It's like when you ride your bike with pedals and then use the electric motor to help you go even faster.
Overall, a combined cycle powered railway locomotive is a special train that uses gas and electricity to move really fast down the tracks. It's like a big, fancy toy train that can go super-fast!