Projects under the ambitious transmission plan to connect the upcoming 33 solar power parks across India are likely to be awarded through tariff-based competitive bidding (TBCB).The green corridor project — a dedicated transmission network for renewable energy — was envisaged by state-owned Power Grid Corporation (PGCIL) at an estimated cost of Rs 40,000 crore in 2011. With the new government revising the targets five times, a secondary plan for solar parks was also drafted along with revised transmission plan. According to industry estimates, the cost of connecting 27 solar parks is close to Rs 55,000 crore. Last year, seven more parks were added, taking the cumulative capacity to 19,900 megawatt, according to government documents.n a recent inter-departmental meeting held to discuss the green corridor project, it was mentioned the evacuation system for future solar parks “to be normally constructed through TBCB”.The Ministry of New & Renewable Energy, Ministry of Power, PowerGrid and the Central Electricity Authority (CEA) participated in the meeting. “CEA and PGCIL would be drafting the plan for the overall evacuation system for solar parks and provide back-end support,” said an official in the know. PGCIL is already constructing the inter-state transmission network for connecting renewable energy-rich states (Green Corridor-I). As for Green Corridors-II for solar parks, work is underway for six solar parks in Andhra Pradesh, Madhya Pradesh, Karnataka, Rajasthan and Gujarat.To expedite the transmission development for the upcoming solar parks, the projects would now be awarded to private players as well through transparent bidding process. The move is in line with the government’s plan to open up the power transmission sector for private investment. Industry executives said Sterlite Grid, Adani Power, Essel Infra, and Tata Power etc might participate in the bidding. These companies had won several power transmission projects last year through TBCB.