The board has approved system strengthening in the southern region at an estimated cost of Rs 1,455.47 crore, the company said in a release.
The board has also approved investments in tranmission systems across select states including Madhya Pradesh and Andhra Pradesh among others.
The stock opened at Rs 142 and touched a high of Rs 144 on the BSE. At 2:20, over 4.6 million shares were traded on both the stock exchanges.