Hinterrhein power plants
| Kraftwerke Hinterrhein AG
|
|
|---|---|
 |
|
| legal form | Corporation |
| founding | 1956 |
| Seat | Thusis |
| management | Guido Conrad |
| sales | 70 million CHF (financial year 2014/15) |
| Branch | power supply |
| Website | www.khr.ch |
| Hinterrhein power plants | |||
|---|---|---|---|
 |
|||
| location | |||
|
|||
| Coordinates | 751 945 / 161 791 | ||
| country |
 Switzerland
|
||
| Waters | Hinterrhein , Averser Rhein and tributaries | ||
| Data | |||
| Type | three-stage power plant group with storage , pumped storage and run-of- river power plants | ||
| Primary energy | water | ||
| power |
(Turbine output ) Total output : - turbine : 658 MW - pump: 90 MW Centers: |
||
| Project start | 1956 | ||
| Start of operations | Sils: 1960 Ferrara: 1962 Bärenburg: 1962 Thusis: 1968 |
||
| turbine |
Central Ferrara : 3 horizontal Francis turbines 2 vertical feed pumps Central Bärenburg : |
||
| Energy fed in per year |
Total: 1475 GWh Ferrera: 307 GWh Bärenburg: 491 GWh Sils: 660 GWh Thusis: 16 GWh |
||
| Website | www.khr.ch | ||
| was standing | 2020 | ||
The Kraftwerke Hinterrhein AG , abbreviated KHR , based in Thusis is a three-stage power plant group , which water power in the Upper Rhine Valley and its side valleys in the Swiss canton of Grisons uses.
history
In the early 20th century, the first construction plans for power plants in the area of the Hinterrhein river system were drawn up. In 1942 the consortium Kraftwerke Hinterrhein (KKH) was established with the aim of realizing storage plants in the Hinterrhein region. The project failed due to political resistance because Splügen and part of Medels would have been flooded. As a result, the reservoir in the Italian Valle di Lei was designed as a head storage . A treaty between Switzerland and Italy in 1949 made it possible to found Kraftwerke Hinterrhein AG in 1956 and start construction in 1957. Construction work lasted six years, and the power plant was gradually put into operation between 1961 and 1963.
General plan of the project from 1942
Longitudinal profile of the project from 1942
Administration building in Thusis
owner
Kraftwerke Hinterrhein AG is organized as a partner plant company. The company's shares are owned by the companies involved, none of which own a majority of the shares. They are:
- Edison SpA , Milan : stake 20.00%
- City of Zurich , represented by the EWZ : 19.50%
- Axpo Power AG , formerly NOK: 19.50%
- Canton of Graubünden : 12.00%
- Alpiq AG : 9.28%
- BKW Energie AG : 7.72%
- Repower AG : 6.50%
- Concession municipalities: 3.00%
- IWB (Industriewerke Basel) 2.50%
technology
|
Kraftwerke Hinterrhein AG Reservoirs and power plants in the Hinterrhein area |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Lake Lei
The Lago di Lei is the uppermost reservoir, the so-called head storage, of the power plant group, which is located on Italian soil except for the dam. The melt water is collected in it in summer so that it is available to drive the turbines in winter when there is peak energy demand. In addition to the natural tributaries, water is also supplied from the Maleggbach, Bacherbach, Jupperbach and the Avers Rhine from the Avers . This water first reaches the Preda catchment basin in Madris, which dams the Madriserrhein. Water from the Blesbach, Pisciabach and Parebach from the Madris also reaches these collecting basins. The collecting basin is connected to Lago di Lei by a five-kilometer tunnel. Water is also pumped from the Sufnersee and from the Ferrera equalization basin through the Ferrera headquarters into the Lago di Lei.
Headquarters Ferrera
The water from Lago di Lei is processed at the Ferrera headquarters. The system is installed in a 143 m long, 29 m wide and 24 m high cavern that is 180 m deep in the mountain. The equipment with three horizontal Francis turbines is unusual despite a gradient of over 500 m, where normally only Pelton turbines are used. The processed water is fed into the Sufner See. The three turbines can also be operated as pumps, so that, on the one hand, water can be pumped from the Ferrera equalization basin above the power plant, but also water from the Sufner lake into the Lago di Lei. In order to pump water from the Sufnersee, two additional pumps installed in the basement of the cavern have to be put into operation, which either feed the water to the Francis turbines or pump it into the equalization basin.
Sufnersee
The Sufnersee is dammed by an arch dam. Its water can either be processed by the Bärenburg headquarters or transported by the Ferrera headquarters to the Ferrera compensation basin or to Lago di Lei.
Central Bear Castle
Four vertical Francis turbines are installed in the Bärenburg headquarters, with which the water from the Sufnersee is processed. The water is integrated in a gravity dam, which dams the Bärenburg compensation basin and at the same time also supports the switchgear .
Central Sils
The headquarters in Sils processes the water from the Bärenburg compensation basin. There are four vertical-axis Francis turbines with three-phase generators for the generation of 50 Hz national energy, and two Pelton turbines with single-phase generators for the generation of 16.7 Hz traction current for the Rhaetian Railway . The power plant generates around 40% of the power required by the Rhaetian Railway.
Thusis headquarters
This power plant uses the doping water discharged from the Bärenburg headquarters into the river bed of the Hinterrhein in run-of-river power plant operation with two horizontal-axis Francis turbines. It is used to power the surrounding communities.
Switchgear Sils
The electricity generated by the Ferrera and Bärenburg centers is transported to Sils via a 220 kV line. From the switchgear in Sils, the electricity arrives in the greater Zurich area via the 380 kV Sils-Fällanden line .
Web links
Individual evidence
- ↑ Entry of "Kraftwerke Hinterrhein AG" in the Graubünden commercial register ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ Carl Jegher: The Hinterrhein power plants with the Sufers and Rheinwald reservoirs . In: Schweizerische Bauzeitung . tape 121 , no. 17 , April 24, 1943, p. 207–215 , doi : 10.5169 / seals-53084 .
- ↑ Kraftwerke Hinterrhein AG (fold-out brochure) . 2018 ( longitudinal profile on page 4 [PDF]).
