Thung Song – Songkhla III Line is a 500kV overhead line with a length of 105km from Thung Song, Nakhon Si Thammarat, Thailand, to Songkhla III, Southern Thailand, Thailand.

The project, which is currently in the planning stage, is expected to be commissioned in 2022.


Thung Song – Songkhla III Line is an overhead line that will be operated by Electricity Generating Authority of Thailand. The line will carry alternating current (AC) through double circuit cable.

Approximately $39.34m was financed by the authorities to undertake the construction works of the project.

Thung Song – Songkhla III Line project development status

The construction works on the Thung Song – Songkhla III Line project were commenced in 2020 and commissioning is expected in 2022.

About Electricity Generating Authority of Thailand

Electricity Generating Authority of Thailand (EGAT) is a state-owned power utility. It generates, procures, transmits, and distributes electricity. The authority produces energy using hydro, coal, natural gas, wind, solar, geothermal, diesel, fuel oil and palm oil, among others. EGAT procures electricity from neighbouring countries and domestic IPPs and SPPs on wholesale basis. It supplies energy to the Metropolitan Electricity Authority, Provincial Electricity Authority, legal power users, and neighbouring utilities.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.