PT Thredio Engineering has achieved a significant milestone by completing the installation and commissioning of the Automatic Generation Control (AGC) system at the Darajat Unit 1 Geothermal Power Plant, managed by PT PLN Indonesia Power Kamojang POMU. This marks Thredio's first AGC project in Indonesia's geothermal sector, following an intensive coordination process with plant operators, grid controllers, and other stakeholders. After undergoing various testing phases from point-to-point checks to real-time validation the system successfully passed final testing on May 24, 2025, and is scheduled to begin full operation on June 24, 2025. This implementation is expected to enhance system reliability and overall operational efficiency.
The AGC implemented at Darajat Unit 1 is designed to integrate seamlessly with the national power grid, enabling automatic power adjustments to maintain frequency stability and respond to changing load demands. With this system in place, power generation control can be automated, reducing reliance on manual operations, minimizing human error, and accelerating the power plant's response to grid fluctuations. This is particularly important in the context of geothermal power plants, where output stability can be affected by changes in steam conditions.
The success of this project also demonstrates Thredio's expertise in handling complex control system integration. One of the main challenges successfully overcome was adapting the AGC to the existing control system while ensuring that the entire process remained compliant with PLN's regulations and grid codes. The Thredio team worked closely with PLN Indonesia Power engineers to refine the AGC algorithm, ensuring a smooth transition between manual and automatic modes while maintaining safety aspects.
With this achievement, PT Thredio Engineering further solidifies its position as a strategic partner in supporting Indonesia's energy transformation, particularly in the automation of renewable energy-based power plants. The success of this AGC project marks a promising first step toward replication in other power plants with different configurations. Given that geothermal energy plays a crucial role in achieving the Net Zero Emission 2060 target, the innovations introduced by Thredio are an essential component in supporting PLN's efforts to build a more resilient and intelligent power grid.
