I want to know the answer to the following question:
How can electric power plant become more power efficient?
All the background I'm provided with is that "While the efficiency of power plant generation and diesel locomotive generation are roughly the same in the nominal regime, diesel motors decrease in efficiency in non-nominal regimes at low power  while if an electric power plant needs to generate less power it will shut down its least efficient generators, thereby increasing efficiency.". Is that enough to answer the question?
Answer: yes