Kiisa evening

Kiisa ERPP I & II

Kiisa, Estonia

250 MW

Even in one of the smallest countries in the EU, managing the power grid is not easy. This is the task of Wärtsilä's customer Elering, the Estonian trans­mission system operator (TSO), who is responsi­ble of operating the Estonian electrical grid in a safe way. A constant, real-time balance between supply and demand is an abso­lute must to keep the grid running and without unbalancing the frequency. However, a TSO can only control one side of the equation. While the energy supply has to be carefully managed by the TSO, in order to meet the amount the country is consuming every minute, power consumption cannot be controlled. What happens if too many customers coinciden­tally decide to start using electricity at the same time, or one of the main power plants suffers an unexpected malfunction? A blackout.

Kiisa - Estonia

For us, the specific technology was not so relevant. We had end results that needed to be met, and Wärtsilä's engines simply offered an unrivalled solution.
Ilo Toom, Project Manager at Kiisa for Elering


Extremely fast ramp-up time to comply with grid requirements

Ability to restart the whole national grid in case of a total blackout

Minimising the need for on-site operating personnel

Extreme ambient conditions -80ºC variance between summer and winter temperatures


Internal combustion engines with
the best ramp-up capability in the market (>100%min)

Blackout capability: no need for electricity to start-up

Internal combustion engines insensitive to extreme conditions

Fully automated operation,
no on-site personnel needed


True stability for the grid, ability to
fill in immediately in case of failure

Safety and stability, the Kiisa plant can over the loss of the biggest generation unit of the country

All-year round reliability

Cost decrease, personnel focused
on key tasks and minimised price
for reserve power

  • Read the whole story

Main data

   Customer   Elering (Utility / TSO) 
   Type   Wärtsilä 34DF grid stability / emergency multi-fuel power plant
   Operating mode   Peak load / standby & emergency
   Gensets   27 x Wärtsilä 20V34DF
   Total output   250 MW 
   Fuel   Natural gas & LFO
   Scope   EPC (Engineering, Procurement & Construction)
   Delivered   2013 & 2014

Contact us

If you want to know more about the Kiisa project, please contact

Timo Mahlanen
General Manager, Data Centers
Wärtsilä Energy Business
Tel. +358 40 500 0536

© 2021 Wärtsilä