India's NTPC Green Energy filed draft papers for a 100 billion rupees ($1.19 billion) initial public offering on Wednesday, as it looks to cash in on the country's renewables expansion plans and a red-hot equities market.

The company, a unit of state-owned power producer NTPC, will only issue new shares, and existing shareholders will not sell any stake, the draft papers showed.

The IPO market in India is booming. So far this year, about 235 companies have gone public and raised more than $8.6 billion, which exceeds the total amount raised last year.

India's benchmark Nifty 50 index has hit record highs more than 50 times this year.

Large power producers in India are all betting big on renewables and making pledges to expand their green energy capacities, while the Indian government is aiming to add at least 500 GW of clean energy by 2030 to reduce carbon emissions.