PSPP Linthal (Switzerland)

The PSPP Linthal was commissioned and handed over to

operator AXPO in 2016 and is producing energy since then.

The 1000MW PSPP is one of the most advanced

hydroelectric power plants in the world.

It is equipped with four rotating machines of 250MW each.

where the decision was taken to use the variable speed

technology to improve operation behaviors and increase the

advantages in regard of efficiency in full load and especially

the significant improvement in part load operation.

Power Conversion’s scope includes:

• Four 48/48MVA converters for the variable speed asynchronous machines

• Four excitation transformers 18/3.0kV; 28MVA

• Control excitation equipment to start-up the machine and synchronize the

units to the grid

• Overvoltage control protection (crowbar) for rotor of the machine

• Low voltage ride through (LVRT) ability according to Swiss grid code