Solution
Geiger® Electric Fish Repelling System
South Germany
Installation of a Geiger® Electric Fish Repelling System for a Hydropower Plant in the South of Germany.
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Situation
A fish protection system was to be retrofitted at the intake structure of a power plant in the South of Germany. In a preliminary study, a Geiger® electric fish repelling system (FSA) was identified as the core element for this.
Electric fish repelling systems are used as a behavioral barrier to prevent fish from swimming into “danger zones” such as water intake openings.
The intake structure of the power plant is equipped with three coarse bar screens. Each bar screen can be pulled to the surface on a rail system using steel cables. This is usually done once a year to manually remove flotsam and maintain the roller bearings. It was agreed to attach the electrodes of the fish repelling system directly to the screen panels, as this allows the FSA to be installed and maintained above water when the screens are pulled.
The electrodes for the fish repelling system were mounted directly onto the customer's existing bar screen, which are located approx. 25–35 m below the water level, depending on the water level in the lake. To do this, the bar screen segments first had to be pulled and then lifted over the winch house to the installation site using a mobile 300-ton telescopic crane and then lifted back the same way once the electrodes had been installed.
The subsequent work on the inclined plane above the intake structure was largely carried out by trained and specialized industrial climbers using appropriate safety measures.
Advantages
- Suitable for water intakes, pumping stations, hydroelectric and pumped storage power stations on rivers and lakes
- Homogeneous scour field design thanks to computer-aided calculation of all system parameters
- Optimum scouring field formation thanks to individually planned solutions
- Fully automatic control system for pulse emission and voltage control
- Continuous monitoring of the scouring field
Technical Data
| Product | Equipment | Average power consumption | Video |
|---|---|---|---|
| 1 Geiger® Electric fish repelling system for 3 bar screens | 15 electrodes | approx. 9 kW | Geiger® Electric fish repelling system (Fish Protection Technology) |
