A B S T R A C T

* Power&SocialInfrastructureBusinessGroup,FujiElectricCo.,Ltd.

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1. Introduction

Along with hydraulic, photovoltaic and windpower generation, geothermal power generation us-inggeothermalresources,whicharerenewableenergysources, emits considerably less CO2 emissions thanpower generation based on fossil fuels. It has beenattracting global attention in terms of reducing CO2emissions.

Fuji Electric has delivered major equipment forgeothermal power plants with a capacity exceeding2,900 MW inside and outside Japan and maintainedamarketshareofabout40%intheworldforthelast10years (see Fig. 1). This is theresultof customerscomprehensive evaluation of Fuji Electrics technolo-gies forsolvingproblemsspecifictogeothermalpowerplantssuchascorrosionandscale,aswellasitsabili-

MURAKAMI, Takashi * TAKAMIYA, Atsushi *

Units 5 and 6 at Lahendong Geothermal Power Plant and Units 3 and 4 at Ulubelu Geothermal Power Plant in Indonesia

Indonesia has been promoting geothermal development as a measure to overcome its increasingly serious power shortage. Fuji Electric has long been committed to geothermal power generation, which has low CO2 emis-sions and provides an eco-friendly and stable power supply independent of weather conditions. We possess a large number of technologies in this field. We emphasize the relationship with partners and work to shorten the construc-tion period by applying various ideas and making efforts based on our experience and track record for promoting an engineering, procurement and construction (EPC) project. Units 5 and 6 at the Lahendong Geothermal Power Plant and Units 3 and 4 at the Ulubelu Geothermal Power Plant started commercial service up to 3 months ahead of the ini-tial schedule, helping to improve the electricity situation in Indonesia.

tiestocarryoutprojects,includingshorteningofworkperiods,asanengineering,procurementandconstruc-tion (EPC)contractor. Wehaveexperienceconstruct-ing a triple-flash geothermal power plant in NewZealandthathasthelargestcapacityintheworld.Wehave also obtained a good reputation for technologiesspecifictogeothermalpowerplants,suchasmeasuresagainstsilicaprecipitationandtheselectionofturbinebladematerial.

Indonesia has been promoting geothermal devel-opment as a measure to overcome its increasinglyseriouspower shortage. Units 5 and6 ofLahendongGeothermal Power Plant andUnit 3 of UlubeluGeo-thermalPowerPlant, towhichFujiElectricdeliveredmajorequipment,startedcommercialoperationaheadof their initial schedules. The construction work forUnit 4 of Ulubelu Geothermal Power Plant has beencontinuingsmoothlyandweaimtocompleteitinApril2017.

Thispaperdescribesanoverviewofthesegeother-mal power plants and our efforts toward shorteningworkperiods.

2. Geothermal Power Generation in Indonesia

Indonesia is a key country in the Association ofSoutheast Asian Nations (ASEAN), abundantly en-dowedwithnaturalresourcesandalaborforce,andisexpected to continue seeing significant growthalso inthefuture.

AlthoughthedemandforelectricpowerinIndone-siahastendedtoincreasesignificantlyinrecentyears,thepowerdevelopmentplanhasrather failedtokeepupwith thesituation (see Fig. 2(1),(2)). Theelectrifica-tionratio isstill lowataround70%andpowershort-age is soserious thatplannedoutagesareperformed.Therearedemands for theconstructionofnewpower

United StatesTotal: 721 MW(20 units)

IcelandTotal: 309 MW(8 units)

TurkeyTotal: 60 MW(1 unit)

ChinaTotal: 3.2 MW(1 unit)

JapanTotal: 6 MW(5 units)

PhilippinesTotal: 509 MW(15 units)

New ZealandTotal: 315 MW(3 units)

IndonesiaTotal: 823 MW(16 units)

NicaraguaTotal: 77 MW(2 units)

El SalvadorTotal: 91 MW(3 units)

MexicoTotal: 25 MW(1 unit)

Grand total: 2,939 MW (75 units)

Fig.1 Fuji Electrics achievements in delivery of geothermal power generation equipment

13Units 5 and 6 at Lahendong Geothermal Power Plant and Units 3 and 4 at Ulubelu Geothermal Power Plant in Indonesia

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plantsaswellasforthereinforcementoftransmissionnetworks.

On the other hand, the total capacity of the geo-thermalpowergenerationfacilitiesinIndonesiaistheworlds third largest after the United States and thePhilippines,andapowerofabout1,340 MWwasgen-erated from geothermal energy as of 2015. Althoughthe countrys geothermal resource potential is esti-matedtobe29,000 MW,whichisthesecondlargestintheworld, theutilizationratio remainsataround5%(see Fig. 3).

Consideringsuchbackground,theMinistryofEn-ergyandMineralResourcesofIndonesiahassetagoalofexpandingthepowersupplyfromgeothermalpowerplantsandincreasingthetotalelectricalpowercapac-ity based on geothermal energy to 9,500 MW in thecountry(3).

By capitalizing on its expertise and experiencein the geothermal power generation equipment field,Fuji Electric has delivered 3 generators and 16 units(turbine and generator) of geothermal power gen-erationequipmentinIndonesia. Thetotalcapacityofgeothermal power generation equipment delivered byFujiElectrichas reachedabout823 MW. InFY2014,FujiElectricobtainedanorderforaprojectof2units,

namelyUnits5and6ofLahendongGeothermalPowerPlantandaprojectof2units,namelyUnits3and4ofUlubeluGeothermalPowerPlant(see Fig. 4).

For both projects, Fuji Electric proposed high-quality and high-performance equipment in shortdelivery time, which were highly rated by the client;andwewontheordersamongincreasinglyfiercecom-petition in the geothermal power generation market.While Unit 4 of Ulubelu Geothermal Power Plant isunder construction,Units5and6 ofLahendongGeo-thermalPowerPlant andUnit 3 ofUlubeluGeother-mal Power Plant have already started commercialoperationupto3monthsaheadoftheoriginalprojectschedule.

The construction and commissioning of Unit 4of Ulubelu Geothermal Power Plant are proceedingsmoothly,andweaimtostartcommercialoperationinApril2017.

3. Units 5 and 6 of Lahendong Geothermal Power Plant

3.1 Project overviewUnits 5 and 6 of Lahendong Geothermal Power

Plantwereconstructedinthemountainsabout800mabovesealevelinTalikuranvillage,TompasoDistrict,Minahasa Province on Sulawesi Island, which is an

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Fig.2 Electric power demand prediction and development plan in Indonesia

Wayang Windu 227 MWUnit 1: 110 MWUnit 2: 117 MW

Lahendong, Units II, III and IV: 60 MW (20 MW 3)Lahendong, Units 5 and 6: 43 MW (21.5 MW 2)

Ulubelu, Units 1 and 2:110 MW (55 MW 2)Ulubelu, Units 3 and 4:117.6 MW (58.8 MW 2)*

* Under construction

Darajat 246.3 MWGenerator onlyUnit 1: 55 MWUnit 2: 81.3 MWUnit 3: 110 MW

Salak, Units 4, 5 and 6: 165 MW (55 MW 3) Kamojang, Unit 4: 63 MW (63 MW 1)

Kamojang, Unit 5: 37 MW (37 MW 1)

Fig.4 Fuji Electrics achievements in delivery of geothermal power generation facilities in Indonesia

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Fig.3 Comparison of utilization ratio of geothermal power gen-eration in major countries

14 FUJI ELECTRIC REVIEW vol.63 no.1 2017

island locatedatalmost thecenterof Indonesia. Theplace is about an hour and 20 minutes by car fromManado, the capital city of North Sulawesi ProvincelocatedatthenorthendofSulawesiIsland.Thegen-eration capacity is 40 MW at the sending end as netelectricpoweroutput(20 MW 2units).InthenearbyvillageofLahendong,existingUnitsIItoIVofLahen-dong Geothermal Power Plant have been operatingcommercially.AlloftheseunitsweredeliveredbyFujiElectric(see Fig. 5).

This project was ordered by PT Pertamina Geo-thermalEnergyonDecember1,2014asanEPCcon-tractincludingcivilengineeringandinstallation,withSumitomoCorporationspecifiedasaprimecontractor.Fuji Electric closed a contractwith SumitomoCorpo-ration to deliver the major equipment of the powerplantincludinggeothermalsteamturbinesandgenera-tors thatconstitute themainpartandcondensers. Asteam-above-ground system (SAGS) and some otherequipmentweredeliveredbyPTRekayasaIndustri,aleadingengineeringcompanyinIndonesia.

Figure 6showsapanoramicviewofUnits5and6of Lahendong Geothermal Power Plant and Fig. 7 isthe external appearance of the turbine and generator

ofUnit5.

3.2 Project characterist