Tata Power is looking for coal assets in US, Colombia and Africa, its managing director, Anil Sardana, told reporters on Thursday.
"We are continuously looking at the other geographies and today the options are the US, Colombia and Africa," he said.
Tata Power's total generation capacity stands at 6,099 megawatts, the company said in June.
Coal accounts for the majority of power generation in India, which has the world's fifth-largest reserves.
However, producers are facing shortage as Coal India is unable to meet demand.