Option 1: From Aligarh old bus stand (adjecent to railway station) UP Roadways bus service from Aligarh to Moradabad frequency every 45 minutes. Goes through Narora town from Narora town get autorickshaw to power plant township. OR if you want to go power station it self than you could deboard the same bus a bit before Narora town right at the gate of power station. Ask bus conductor to drop you at the gate of power station.
Option 2: From Anand vihar ISBT (Delhi) you get UP Roadways bus going to badaun (frequency 1 hr) which goes through Narora town from there get autorickshaw to township.
PRECAUTIONS:...
more... Ask bus conductor wheather it goes to Narora or not because Delhi to badaun buses have two routes 1 via sambhal, chandausi , 2nd via bulandshahr, Narora.