EGAT Launches TIEC 3.1 Project to Upgrade Main Power Grid for Renewable Energy

Key summary

The Electricity Generating Authority of Thailand (EGAT) is implementing the Transmission System Improvement Project in Northeastern, Lower Northern, Central Regions and Bangkok Area to Enhance System Security (TIEC) Phase 3.1. The project aims to upgrade the national power grid to handle increased demand in Bangkok and the central region while importing clean energy from the Northeast and Lower North. Key components include constructing new 500 kV and 230 kV transmission lines totaling hundreds of kilometers, upgrading substations at Nakhon Ratchasima 3, Nong Chok, Chaiyaphum 2, Wang Noi, and Tha Tako, and installing STATCOM devices to stabilize voltage against renewable energy fluctuations. The initiative is scheduled for October 27, 2026.