Project reference · Complete refurbishment

Hydropower Plant Solberg

Refurbishment of the turbine, generator, waterway, trash rack, hydraulics and control technology in an existing hydropower plant.

TurbineFrancis turbine

GeneratorAsynchronous generator · 40 kW

Head4.5 m

Flow rate1,000 l/s

Project scopeComplete refurbishment

Turbine, waterway and automation

Renewal of the plant’s core components

As part of a complete refurbishment, the Francis turbine was overhauled and the generator replaced. A new trash-rack field was constructed on the water side, and the leaking wooden pipeline was replaced with a GRP pipeline.

The control system was rebuilt from the ground up. The scope includes a Siemens S7-1500 PLC, reactive-power compensation, a new hydraulic power unit, and temperature and vibration sensors. Automatic setpoint level control supports regulated operation.

Machinery: Overhaul of the Francis turbine and replacement of the asynchronous generator.
Waterway: Wooden pipeline replaced by a GRP pipeline; new trash-rack field constructed.
Control system: Complete new build with Siemens S7-1500, temperature and vibration monitoring.
Hydraulics and control: New hydraulic power unit, reactive-power compensation and automatic setpoint level control.

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Work during the overhaul of a turbine component at Hydropower Plant Solberg. — **Turbine overhaul**
Overhaul of the Francis turbine in the machine area.

Generator and turbine area during refurbishment at Hydropower Plant Solberg. — **Generator and turbine**
Machine area during renewal.

Draft-tube outlet and turbine area at Hydropower Plant Solberg. — **Outlet area**
Water and machinery area of the plant.

Existing wooden pipeline before replacement at Hydropower Plant Solberg. — **Before: wooden pipeline**
Existing waterway before renewal.

Installation work during pipeline renewal at Hydropower Plant Solberg. — **Pipeline conversion**
Work on the renewed waterway.

New GRP pipeline at Hydropower Plant Solberg. — **After: GRP pipeline**
Newly constructed GRP waterway.

Overall view of the new GRP pipeline at Hydropower Plant Solberg. — **GRP pipeline**
Overall view of the new pipeline route.

New trash-rack field at the intake of Hydropower Plant Solberg. — **New trash-rack field**
Fine trash rack protecting the turbine intake.

Existing operator and display unit before the new control system. — **Before: operation**
Existing control and display unit before renewal.