Power Grid Corp on Saturday said its board has approved proposals to invest Rs 1,184.45 crore in power transmission projects across the country. Its Board of Directors, in their meeting held on Saturday, have accorded approval to 3 investment proposals, Power Grid Corp said in a BSE filing. The Board has approved the proposal ‘Augmentation of Transformation Capacity in Southern Region’ at an estimated cost of Rs 167.75 crore, with commissioning schedule of 30 months from the date of approval. It also approved investment for ‘Sub-station works associated with strengthening of transmission system beyond Vemagiri'’at an estimated cost of Rs 608.24 crore, with commissioning schedule of 30 months from the date of approval.