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| Main Authors: | , , , , , , , , |
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| Format: | Recurso digital |
| Language: | |
| Published: |
Zenodo
2025
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| Online Access: | https://doi.org/10.5281/zenodo.16025482 |
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Table of Contents:
- <p>The run-of-river hydropower plant HPP "Bajina Bašta" and the pumped-storage<br>hydropower plant PSH "Bajina Bašta" in Perućac are the largest hydropower facilities built on<br>the Drina River. PSH "Bajina Bašta" is of great importance to Serbia's power system due to its<br>ability to operate in both generating and pumping modes, thereby increasing the system's<br>flexibility in terms of managing production and consumption. Periods of lower electricity<br>consumption are used to fill the upper reservoir by operating the plant in pumping mode.<br>When the system requires additional energy, the units switch to the opposite mode, and the<br>release of water from the higher-altitude reservoir drives the turbines, generating electricity.<br>Also, due to its ability to start quickly and rapidly switch between generating and pumping<br>modes, this plant can quickly respond to system disturbances and replace any other unit in the<br>electrical power system of Serbia. Therefore, the revitalization of PSH "Bajina Bašta," which<br>is expected to extend the lifespan of the units by several decades, is of great importance to the<br>power system. In 2024, the first unit was revitalized, while the revitalization of the second<br>unit is scheduled for 2025. Nikola Tesla Institute of Electrical Engineering participated in the<br>revitalization by replacing the excitation systems. The power section of the excitation system<br>includes high-performance components: excitation transformers, circuit breakers, thyristor<br>bridges, demagnetization equipment, etc. The control section of the excitation system is based<br>on certified INTROL excitation regulators developed and manufactured at the Nikola Tesla<br>Institute. Within the regulators, sequential automatons are implemented for all operating<br>modes of the units: generating mode, pumping mode, synchronous start, electric braking, and<br>testing. INTROL regulators enable various control modes: automatic stator voltage regulation,<br>automatic reactive power regulation, and automatic power factor regulation, along with<br>limiter functions and a power system stabilizer. The thyristor bridges and excitation regulators<br>are implemented redundantly in a 1+1 configuration. After installation and connection, the<br>excitation system was adjusted and tested, demonstrating good system performance, enabling<br>reliable and stable unit operation in all operating modes, with automatic operation limitation<br>within the boundaries defined by the operating diagram.</p>