Grid stabilisation

The Green Frog group is actively engaged in building and operating synchronous condenser plant to provide stability to national electrical networks.

There are ever-increasing megawatts of intermittent renewable energy entering the market, which provide little inertia to the system.

At the same time the many large turbines such as those at coal-fired stations are closing.

This creates an increasing and essential requirement for new grid-scale stabilising plant. Without it the networks will get out of sync or overreact to a short circuit and shut themselves down.

Green Frog Power provides:

Short circuit level – protecting the grid from being thrown out of sync by a short circuit. The service is measured in megavolt amps (MVA).
Synchronous inertia – providing inertia to the electrical grid when intermittent generators increase their output or falter, measured in megavolt amps seconds (MVA.s), this reduces oscillations in grid frequency and prevents system blackouts.
Reactive power – to regulate the electrical system’s voltage, measured in megavolt amps reactive (MVAr)

We can plan, design, finance, build and operate a complete stabilisation station.

In 2022 we won a contract to supply National Grid with a pair of synchronous condensers in south Wales, connecting to the electrical transmission system at 275kV.

In the Republic of Ireland our subsidiary Green Frog Power (Wexford) Limited has won a contract with national system operator EirGrid to build and operate grid-stabilising plant.

We’re at the forefront of the nascent and growing worldwide need for increased grid stabilisation.

We’re also developing 500MW of battery projects.