Power plant, Indonesia

Arun, building an optimum generating system

Sumatra, Indonesia

184 MW

With a population of nearly 250 million and an economy that has grown at an average of 5.6 per cent a year over the last decade, Indonesia is hungry for power. To improve electrification and meet a demand that is expected to grow at 9-10 percent per annum in the coming years, much of the new capacity that is being added is in the form of large baseload coal-fired plant. However, building an optimum generating system that can also meet peak electricity demand is a challenge.

The Arun power plant will serve to strengthen the Aceh Special District electricity system, ensuring reliable electricity supply to consumers during peak loads.

Arun - Sumatra, Indonesia


Meet a heavily fluctuating peak demand for short periods

Very large operating window required

Fast growing demand soon renders current capacity insufficient

Currently baseload plants must
be used also for peaking

Grid stability and reliability issues


Wärtsilä 34SG combustion engines capable of daily starts/stops without any impact on maintenance

Multiple engine solution with higher efficiency than open cycle GT plants

Attractive delivery time, financial
and development services

Smart Power Generation plants
used for peaking & grid stability

Internal combustion engines with excellent ramp rates and able to reach full load in 10 minutes


Lower lifecycle costs

Can follow load without reducing overall plant efficiency

Customer can deliver power
faster and start earning on
electricity sales earlier

More efficient use of baseload plants

Grid support

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Main data

Customer PT Wijaya Karya Persero Tbk (PT Wika) (Utility)
Type Wärtsilä 34 gas power plant
Operating mode Peak load/stand-by & emergency
Gensets 19 x Wärtsilä 20V34SG
Total output 184 MW
Fuel LNG (Liquefied natural gas)
Scope EEQ (Engineering & Equipment)
Delivered 2015

Contact us

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

Suraj Narayan
Sales Director, Power Plant
Wärtsilä Energy Business
Tel. +61 2 9672 8200

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