Hydroelectric Power Plants in Indonesia

Asahan-I
Location: North Sumatra
Operator: PT Bajra Daya Sentranusa
Configuration: 2 X 90 MW Francis
Operation: 2010
T/G supplier: Dongfang
EPC: China Huadian Engineering Corp, PT Prima Layanan Nasional Enjiniring
Quick facts: In Mar 1996, PT Bajragraha Sentranusa was established to develop a run-of-river hydropower plant on the Asahan River and Asahan-I was approved by the government in early 1997 as the first hydroelectric project to be privately financed in the country. The site is upstream of the Siguragura dam. The original 30yr PPA specified a rate of 7.5 cents/kWh for the first 15yrs and 3.5 cents/kWh for the final 15 years. In mid-2004, CHEC was named EPC contractor, but the contract had to be reissued in Jul 2006 as financial close took longer to achieve than expected. China Exim Bank and China Export and Credit Insurance Corp took key roles in the project financing. Construction started in Dec 2006 and the project was handed over in Jun 2010. Commercial operation was in January 2011. The project included a switchyard and double-circuit 275kV line to connect to the PLN system. A notable project feature is the 18m diameter, 67m high steel surge tank, one of the largest of its kind. Asahan-I cost an estimated $247mn.

Photograph courtesy of China Huadian Engineering Corp
Posted 26 Aug 2012

Balla
Location: West Sulawesi
Operator: PT PLN
Configuration: 2 X 350 kW Francis
Operation: 2011
T/G supplier: Zhejiang Jinlun
Quick facts: This is one of four miniydro plants recently deployed in Kab Mamuju.

Photograph by Sektor Bakaru (Panoramio)
Posted 16 Sep 2012

Balambano
Location: South Sulawesi
Operator: PT Inco
Configuration: 2 X 70 MW Francis
Operation: 1999-2000
T/G supplier: CGE
EPC: SNC, Astaldi, Fluor, Thiess Contractors
Quick facts: Balambao is 7km downstream of the Larona power station and both plants are used to supply for the Inco nickel smelter at Saroako. The 92m RCC dam has a crest length of 350m and two 5m diameter penstocks connect to the dam-toe surface powerhouse. The remote site on the Larona River is 30km from the nearest population center. Work on contract procurement began in Apr 1995. Unit-1 was placed into service on 31 Oct and Unit-2 followed on 28 Nov 1999.

Photograph courtesy of SNC-Lavalin
Re-posted 17 Oct 2012

Cirata
Location: West Java
Operator: PT Pembangkitan Jawa Bali
Configuration: 8 X 126 MW Francis
Operation: 1988-1998
T/G supplier: Voest, Elin
EPC: Coyne, Sinotech,Taisei
Quick facts: When Phase II was completed in 1998, this became Indonesia's largest hydroelectric plant.

Photograph courtesy of Taisei Corp
Posted 15 Sep 2004

Kotapanjang
Location: Riau
Operator: PT PLN
Configuration: 3 X 38 MW Kaplan
Operation: 1998
T/G supplier: Boving, Elin
EPC: Hazama
Quick facts: Output from the plant supplies about 20% of the electric power in the provinces of West Sumatra and Riau which between them have a population of over 9mn. JBIC supported construction of the plant and associated transmission line project.

Photograph copyright by and courtesy of VA TECH
Posted 22 Sep 2005

Larona
Location: South Sulawesi
Operator: PT Inco
Configuration: 3 X 65 MW Francis
Operation: 1977
T/G supplier: Sulzer, Hitachi, GE, VA TECH
EPC: Knight Piesold, PT Vale Inco
Quick facts: This was the original power source for the PT Inco smelter at Saroako. The design features a 7km intake canal, two radial intake control gates, a head pond, and three 1.3km penstocks equipped with bypass valves to protect the penstocks during load rejections. From 2003-2006, the PT Inco staff and its contractors development and implemented a comprehensive plant controls upgrade on Larona-3. The actual installation took 12 days. In 2007, VA TECH was contracted to supply generator upgrades and other services for Larona.

Photograph courtesy of Andritz
Re-posted 14 Jan 2010

Mikuasi
Location: Southeast Sulawesi
Operator: PLTM Mikuasi
Configuration: 1 X 500 kW Francis
Operation: 2010
T/G supplier: Zhejiang Jinlun, Chaozhou Huineng Electric

Photograph courtesy of stevenedyson.blogspot.com
Posted 2 Sep 2012

Musi
Location: South Sumatra
Operator: PT PLN
Configuration: 3 X 70 MW
Operation: 2006
T/G supplier: VA TECH
EPC: PT Indra Karya, Shimizu Corp, Nippon Koei Co
Quick facts: At completion, this was the country’s largest hydro plant outside Java. The project was built with ADB funding. It was placed in postponed status in Sep 1997 and development resumed in May 2000. The scheme includes a 213km, 150kV transmission line from the plant to Curup substation and on to Bukit Asam substation. Annual output is about 470 GWh.

Photograph courtesy of Nielsen-Wurster Group
Posted 23 Oct 2005

Saguling
Location: West Java
Operator: PT Indonesia Power
Configuration: 4 X 178-MW Francis
Operation: 1986-1987
T/G supplier: Toshiba, Mitsubishi Electric
EPC: SABCON, Newjec Inc, Proyek Induk Pembangkit Hidro
Quick facts: Saguling is a rockfill dam nearly 100m high and over 300 m long. It inundated about 5,600ha in a densely populated region and there has been considerable study of the ecological and socioeconomic effects of dam construction. The site is 40km from Bandung city and was built on the Citarum River, the largest river in West Java. Originally, Saguling was planned for power production only but the reserovir was repurposed to support fisheries, aquaculture, tourism, and water supply. The plant could be extended to 1,400 MW in the future.

Photograph courtesy of Newjec Inc
Posted 12 Jul 2008

Siguragura
Location: North Sumatra
Operator: PT Indonesia Asahan Aluminium
Configuration: 4 X 50.75 MW Francis
Operation: 1983
T/G supplier: Toshiba, Melco
EPC: Hydroproject Institute, Kajima
Quick facts: The Siguragura HPP intake dam is a concrete 47m high gravity structure in Simorea. Siguragura power station is located 200m underground and was the first underground HPP in Indonesia. Electricity from the two PT Inalum power stations is transmitted via a 120km, 275kV transmission lines to the company's substation at Kuala Tanjung and then to three reduction buildings and other facilities. This project is also known as Asahan-2.

Photograph courtesy of PT Indonesia Asahan Aluminium
Posted 26 Aug 2012

Sipansihaporas
Location: North Sumatra
Operator: PT PLN
Configuration: 1 X 38 MW, 1 X 17 MW Francis
Operation: 2002-2005
T/G supplier: Toshiba
EPC: Tokyo Electric Power Services
Quick facts: In Dec 2005, this hydropower plant was commissioned in Kab Tapanuli Tengah. It was funded in large part by a 12.2bn JICA concessional loan. Production is about 200 GWh/yr.

Photograph courtesy of pltasipansihaporas.blogspot.com
Posted 17 Oct 2012

Sudirman (Mrica)
Location: Central Java
Operator: PT Indonesia Power
Configuration: 3 X 61.5-MW Francis
Operation: 1988-1989
T/G supplier: ASEA, Kvaerner
EPC: SABCON
Quick facts: This multipurpose scheme has a 800m long, 110m tall earth-filled and rock main dam across the Serayu River. Other high-level dams stretch out on either side of the main dam to give a total crest length of more than 5km. The open-air power house is connected to the reservoir by a 570m pressure tunnel. The first study for Mrica was commissioned in 1970, but work did not get underway until Dec 1982. After 6mos, construction had to be halted until Mar 1984 for financial reasons. The main project dates were originally set back two years, but it took less time than expected to restart; at the end of the contract, only about a year was lost and the final turbine was commissioned 2mos ahead of schedule.

Photograph courtesy of Kvaerner
Posted 6 Apr 2004

   
 

Tangga
Location: North Sumatra
Operator: PT Indonesia Asahan Aluminium
Configuration: 4 X 55.75 MW Francis
Operation: 1982
T/G supplier: MHI, Hitachi,Siemens, Melco
EPC: Nippon Koei Co Ltd, Hazama
Quick facts: The 82m tall, 124.5m long Tangaa gravity arch dam is donwstream from Siguragua and was the first dam of its kind in Indonesia.

Photograph courtesy of PT Indonesia Asahan Aluminium
Posted 26 Aug 2012

Abbreviations

Data: industcards, Platts UDI World Electric Power Plants Data Base

Updated 17-Oct-2012

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