Different countries have different types of technologies for producing electricity as well as different ways of ensuring a stable power supply. Quite a few countries, including Ireland, do not have access to large amounts of hydropower or nuclear power and, until now, needed to operate coal or gas-fired power plants, which emit large amounts of CO2 , to ensure a steady frequency in the power grid.

In practice, this means that on an increasingly regular basis, these power plants are run only to stabilise the grid, even though there is more than enough power from wind and solar to cover electricity needs.

This is where the synchronous compensator comes in.

In such situations, the synchronous compensators supply kinetic energy to the system, stabilise the frequency until other power plants, batteries or hydropower plants can increase their power production, and return the power system to balanced operation.

In other situations with a sudden excess of power, the synchronous compensator can absorb power.

These machines are designed to deliver the inertia needed to stabilise the grid and thus eliminate the need to run fossil-fired power plants.


synchronous compensator