Serbia: EPS launches second phase of refurbishment at Bajina Basta hydropower plant

Serbia’s state-owned power utility, EPS, has announced that the refurbishment of the R2 unit at the Bajina Basta pump-storage hydropower plant (HPP) has officially entered its second phase. This refurbishment is part of a broader effort to extend the plant’s operational lifespan by several decades and enhance its capacity to support Serbia’s electricity grid.

The Bajina Basta HPP plays a critical role as a backup power plant, capable of replacing other units within EPS’s system. Due to its unique capabilities, the plant is also well-suited to meet peak daily electricity demand, according to Dušan Tršić, Director of Energy Production at the Drina-Lim HPP subsidiary.

The ongoing works, which are expected to be completed within seven months, include the modernization of various components, such as the pump-turbine motor generator, the generator excitation system, the control system, electrical protection equipment, and generator voltage equipment. These upgrades aim to significantly improve the plant’s technology and overall reliability.

As part of the refurbishment, the pump-turbine runner, guide vanes, and several key components such as upper generator bearings, guide bearings, support bearings, and turbine bearings will be replaced. Some of the necessary equipment has already arrived at the site, with additional components expected in the coming weeks, including the delivery of the pump-turbine runner and guide vanes in June.

The project is divided into three phases:

1. Phase one – The procurement, installation, testing, and commissioning of the pump-turbine and motor generator, contracted to Japan’s Toshiba.
2. Phase two – Modernization of the control system, including electrical protection and generator voltage equipment, led by experts from the Mihailo Pupin Institute.
3. Phase three – Upgrading the excitation system, managed by the Nikola Tesla Institute.

This comprehensive refurbishment aims to modernize the plant’s technology and ensure the continued reliability of HPP Bajina Basta, supporting Serbia’s power system for decades to come.