HVDC > HVDC References > Africa > Inga-Shaba
In spite of the difficult situation in central Africa, this HVDC transmission continues to delivers power.
The second to longest electric power transmission in the world, 1700 km, transmits power from the Inga falls in the Congo river to the copper mining district of Katanga in the Democratic Republic of Congo (DRC).
The Inga-Shaba is a ± 500 kV, 560 MW transmission. Because of the
It is a long way to the other end. | extreme line length and the difficult logistics along the route, it was decided to build two monopolar lines with four switching stations. The converter stations were built so that the two converter poles can be operated in parallel with ground return, in case of a monopolar line outage. |
The ABB contract for the converter stations was signed in 1973, but due to civil unrest in the country (then called Zaire), the transmission could not be taken into service until 1982. The link is owned by DRC's national electricity utility, Société Nationale d'Electricité (Snel).
Kolwesi station
Each valve hall in Inga-Shaba is equipped with six double-valves of air-cooled design. At the time, it was the highest valve voltage in the world, and each single valve has 258 series connected thyristors.
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Valve hall in Kolwezi |
| Main data |  |
| Commissioning year: | 1982 |
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| Power rating: | 560 MW |
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| No. of poles: | 2 |
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| AC voltage: | 220 kV (both ends) |
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| DC voltage: | ±500 kV |
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| Length of overhead DC line: | 1 700 km |
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| Main reason for choosing HVDC: | Long distance |
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