The renewables arm of Indian electric utility Tata Power Co Ltd (<a href="https://www.bseindia.com/stock-share-price/tata-power-company-ltd/tatapower/500400/" target="_blank">BOM:500400</a>) said on Monday it has signed a power purchase agreement (PPA) to develop a 200-MW renewable energy project with Indian state-run energy company NTPC Ltd (<a href="https://www.bseindia.com/stock-share-price/ntpc-ltd/ntpc/532555/" target="_blank">BOM:532555</a>).