As of my last update, India has been actively expanding its High Voltage Direct Current (HVDC) transmission infrastructure to improve power transmission efficiency over long distances and across regions. As of late 2023, India has several HVDC transmission lines operational, with more planned or under construction. Here’s a brief overview of the key HVDC lines in India:
1. **±800 kV HVDC Raigarh-Pugalur Line**: This line runs from Raigarh in Chhattisgarh to Pugalur in Tamil Nadu and is one of the world's highest capacity HVDC lines.
2. **±800 kV HVDC North-East Agra Line**: This line connects the North-Eastern region of India with Agra in Uttar Pradesh, enhancing connectivity between regions.
3. **±600 kV HVDC Vindhyachal-Jeerat Line**: This line connects Vindhyachal in Madhya Pradesh to Jeerat in West Bengal, further improving the inter-regional power transfer.
4. **±500 kV HVDC Chandrapur-Padghe Line**: This line runs from Chandrapur in Maharashtra to Padghe in Maharashtra, strengthening the state's power grid.
5. **±400 kV HVDC Rihand-Dadri Line**: This line connects Rihand in Uttar Pradesh with Dadri in Uttar Pradesh.
Overall, India has a growing network of HVDC lines, with these major ones representing a significant portion of the country's HVDC infrastructure. The exact count can change as new projects are completed and additional lines are commissioned. For the most current information, checking recent updates from entities like the Power Grid Corporation of India or the Ministry of Power would be helpful.