Okuteeka enkola z’okutereka amaanyi g’amasannyalaze agazzibwawo kisinga kukola makulu ng’okuyingira kw’amasoboza agazzibwawo kusukka ebitundu 30-40% ku kutabula kwo kw’amasoboza, ng’emiwendo gya giridi giraga enkyukakyuka ennene mu biseera-eby’okukozesa, oba ng’okweraliikirira okwesigamizibwa kusinga ssente ezisaasaanyizibwa mu maaso. Okusalawo ku budde kwesigamye ku nsonga ssatu ezikwatagana: okugwa kw’ebbeeyi ya bbaatule (okukka ebitundu 40% mu 2024 mwokka), okulinnya kw’obusobozi obuzzibwa obuggya, n’ebyetaago byo ebitongole eby’emirimu.
Akatale k’enkola z’okutereka amaanyi g’amasannyalaze agazzibwawo kaatuuka ku kiseera ekikulu mu 2024. Ebiteekebwa mu nsi yonna byalinnya okutuuka ku 69 GW ne 169 GWh, ekiraga okweyongera kwa 55% omwaka-mu-omwaka. Ekisinga obukulu, ssente z’enkola zakka okutuuka ku doola 165/kWh-okukendeera okusinga obunene okw’omwaka gumu- okuva okulondoola lwe kwatandika mu 2017. Mu China, enkola ezimala essaawa 4 zaakuba doola 85/kWh, nga ttenda ezimu ezivuganya zaali wansi wa doola 66/kWh. Enkola eno ey’omuwendo mu musingi eddaamu okukola ebyenfuna by’okugatta okutereka n’ebifo ebiteekebwamu amasannyalaze g’enjuba n’empewo.
Embeera za Grid Eziraga Okwetegekera Okutereka
Omutendera gw’okuyingira kw’amasoboza agazzibwawo gukola ng’ekiraga ekikulu eky’ekiseera ky’okuteeka mu nkola enkola z’okutereka amaanyi agazzibwawo. Okunoonyereza okwekenneenya omukutu gw’amasannyalaze mu Bungereza kwazuula nti ebyetaago by’okutereka bikula nnyo ng’omugabo gw’amasannyalaze agazzibwawo gweyongera. Ku 50% okuyingira kw’amasannyalaze agazzibwawo, okutereka okutono kumala kubanga jenereta eza bulijjo ziwa obusobozi obumala. Naye okusala ebitundu 60-70% eby’okuyingira kw’amasannyalaze agazzibwawo kireeta ekkubo ery’amaanyi ery’oku makya n’olweggulo ebimera ebya bulijjo bye birwana okutuukiriza.
Texas eraga omusingi guno mu nkola. Omukutu gwa ERCOT gwayongerako GW 4 ez’okutereka bbaatule mu 2024, ne gusukka California omulundi ogwasooka. Okuzimba kuno kwakwatagana n’okukola amasannyalaze agazzibwawo bulijjo okusukka ebitundu 40% ku bwetaavu obw’amangu. Mu kiro eky’empewo ennyingi-n’emisana egy’omusana, emiwendo gya ‘wholesale’ gitera okukka okutuuka ku ziro oba negativu, ekitondekawo emikisa emirungi egy’okukola arbitrage eri enkola z’okutereka ezigula ku buseere ate nga zitunda ku bbeeyi.
Ekintu kya "duck curve" kiwa ekiraga ekirabika. Ebiwandiiko ebikwata ku mudumu gwa California biraga nti obwetaavu obutuufu bukendedde 8-12 GW mu biseera by’enjuba ey’oku ntikko mu makkati g’emisana, olwo ne yeeyongera 13-15 GW mu ssaawa ssatu ng’okufulumya amasannyalaze g’enjuba kukendeera ate ng’obwetaavu bw’akawungeezi bweyongera. Enkola za bbaatule ezirina sayizi okumala essaawa 2-4 ez’obudde bw’okufulumya zisobola okukwata omuwendo ogusinga obungi ogw’ebyenfuna okuva mu kufuukuula ebikonde bino.
Omugotteko gw’obutambuzi gukiikirira ekintu ekirala ekikulu ekivaako. Ebitundu ebigaggawala ebizzibwa obuggya- bwe biba tebirina busobozi bumala kutambuza ebweru okufulumya omulembe ogusukkiridde, okukendeeza kufuuka ekiteewalika. Okunoonyereza okwakolebwa ku mudumu gw’amasannyalaze mu California kwazuula nti okugattako essaawa emu ey’okutereka ku makolero g’amasannyalaze g’enjuba n’empewo mu bitundu ebirimu omugotteko kyayongera omuwendo gw’amasoboza ebitundu 80%. Okwongera ku bbanga ly’okutereka okutuuka ku ssaawa 4 kyawa enyingiza ey’okwongerako ebitundu 30%. Okusukka essaawa 4, marginal value plateaus sharply mu mbeera y’akatale eriwo kati.
Ebifo eby’okuwummulamu mu by’enfuna n’enkola z’ebisale
Enkola z’okutereka amaanyi g’amasannyalaze agazzibwawo zikyagenda mu maaso n’okukendeera mu nsaasaanya mu bitundu by’akatale byonna. Ekitongole kya National Renewable Energy Laboratory kiteekateeka okukendeeza ku nsaasaanya ya kapito ebitundu 18-52% omwaka 2035 we gunaatuukira, okusinziira ku mbeera ya tekinologiya. Mu kuteebereza okw’ekigero, enkola z’ebikozesebwa ez’essaawa 4 zijja kukendeera okuva ku ddoola 165/kWh mu 2024 okutuuka ku ddoola nga 105/kWh omwaka 2035 we gunaatuukira, wadde ng’emisolo n’okutaataaganyizibwa mu nkola y’okugaba ebintu biyinza okukyusa enkola eno.
Ebiseera by’okussaako bireeta ekizibu eky’obukodyo. Okulinda emyaka 2-3 kukwata okukendeeza ku nsaasaanya ey’amaanyi naye ne kwerekereza enyingiza eriwo kati n’ebisikiriza ebiriwo. Ebbanja ly’omusolo mu by’okusiga ensimbi mu Amerika liwa okukendeeza ku nsaasaanya ya bitundu 30% ku nkola z’okutereka ezisasulwa ensonda ezizzibwa obuggya, naye enkyukakyuka mu nkola zikyali tekakasibwa okusukka 2032. Bangi ku bazimba baawulamu enjawulo nga bateekawo obusobozi bw’okutereka mu kusooka kati ate nga batereka ettaka n’ebikozesebwa okusobola okugaziya mu biseera eby’omu maaso.
Enkola z’amayumba n’ez’obusuubuzi zoolekedde ebyenfuna eby’enjawulo. Battery ya bulijjo eya kWh 11.4 awaka egula ddoola 9,000-$12,000 ezassibwa mu 2025, okuva ku ddoola 15,000-18,000 mu 2022. Wabula ebiseera by’okusasula byawukana nnyo okusinziira ku kifo. Mu California wansi wa NEM 3.0 net billing, okusasulwa okutereka kuva ku myaka 6-10 eri amaka agakozesa ennyo akawungeezi. Mu butale obw’omuwendo omutono, okusasula kuyinza okusukka emyaka 20, ekifuula okutereka okusinga okuteeka ssente mu kugumira embeera okusinga ey’ebyenfuna.
Ekibuuzo ekikulu: ebbeeyi ya bbaatule egenda kukka ekimala okusobola okulaga obutuufu bw’okulinda? Okwekenenya ebipimo by’omuwendo gwa lithium-ion kulaga nti amagoba gakendedde mu maaso. Ennongoosereza ezisinga okuba ennyangu-ekipimo ky’okukola, okulongoosa enkola y’okugaba, ne kemiko wa katodi-okusinga bikwatiddwa. Okwongera okukendeeza kujja kujja mpola okuva mu nnongoosereza ezigenda zeeyongera. Kino kiraga nti omwaka 2025-2027 gukiikirira eddirisa erituufu ery’okussaako pulojekiti nga ebyenfuna biri ku nsalo.
Ensonga z’obudde bw’okugatta eby’ekikugu
Okugatta awamu enkola z’okutereka amaanyi g’amasannyalaze agazzibwawo n’ebifo ebikola amasannyalaze mu kiseera ky’okuzimba okusooka kivaamu okukekkereza okunene okusinziira ku kuzzaawo amaanyi oluvannyuma. Ebikozesebwa ebigabanyizibwa-transformers, switchgear, grid interconnection-bikendeeza ku nsaasaanya ne 15-25%. Okukkiriza kutera okugenda mu maaso mangu nga osaba pulojekiti ezigatta ezizzibwa obuggya-plus-storage okusinziira ku nkola ez’enjawulo ezaawukana emyaka.
Ebifo ebiteekebwamu amasannyalaze g’enjuba naddala biganyulwa mu kuteekebwa mu nkola okutereka ebintu mu kiseera kye kimu. DC-coupled configurations, nga bbaatule ziyungibwa butereevu ku solar inverters nga tezinnaba kukyusa AC, zituuka ku round{2}}trip efficiencies ya 90-95% bw’ogeraageranya ne 85-88% ku AC-coupled systems. Naye, DC-coupling yeetaaga okugatta dizayini okuva ku ntandikwa; retrofitting AC-coupling kyangu naye nga tekikola bulungi.
Ebifo ebikola empewo byolekedde okulowoozebwako eby’enjawulo. Enkola z’okukola empewo ziraga okuteebereza okutono okwa buli lunaku okusinga kw’enjuba, nga kyetaagisa okutereka okumala ebbanga eddene-(essaawa 6-8) okukwata omuwendo gw’obusobozi obujjuvu. Okunoonyereza kulaga nti ebyuma ebikola empewo byetaaga essaawa 8 ez’obudde bw’okutereka okusobola okutuuka ku bbanja ly’obusobozi 90% mu ssaawa ez’okutikka obutimba, okusinziira ku ssaawa 4 zokka ku byuma ebikozesebwa enjuba. Enjawulo eno ey’obudde ekosa nnyo ebyenfuna by’okussaako.
Ebiseera by’okuyungibwa ku mudumu (grid interconnection timelines) byeyongera okwagala enkola ezigatta. Mu Amerika, pulojekiti z’okutereka ezeetongodde zirinda emyezi 36-48 ku kigero okukkirizibwa okuyungibwa mu bitundu bingi. Pulojekiti za hybrid renewable-plus-storage zitera okufuna obujjanjabi obw’amangu kubanga zikendeeza ku kweraliikirira kw’empiso y’obutimba. Abaddukanya obutambuzi abawerako kati bajjumbidde okukubiriza enkola ez’omugatte okukendeeza ku ssente ezisaasaanyizibwa mu kunoonyereza ku kuyungibwa.
Pulojekiti z'omutindo gw'ebikozesebwa- zirina obudde bw'okussaako okukwatagana ne bamakanika b'akatale k'obusobozi mu kitundu. PJM, CAISO, ne ERCOT buli emu erina amateeka ag’enjawulo ku ngeri okutereka gye yeetabamu mu ffulaayi z’obusobozi ne ddi omuwendo gw’obusobozi lwe gusibirwamu Okuteekawo okutereka okwetaba mu ffulaayi z’obusobozi ezijja kiyinza okwongera ebitundu 30-50% ku nfuna ey’omwaka mu butale obulina obubonero obw’amaanyi obw’emiwendo gy’obusobozi.
Profiles z’emirimu Eziwa obutuufu bw’okussaako
Ebifo ebizzibwawo ebifuna okukendeera okusukka ebitundu 5-7% ku biyinza okuvaamu amasannyalaze birina okulowooza ennyo ku kuteekawo enkola z’okutereka amaanyi agazzibwawo. Ku ssente za bbaatule eziriwo kati, okukwata amaanyi agakendeezeddwa okugatunda oluvannyuma kitera okuvaamu amagoba amalungi ng’okukendeeza kusukka omusingi guno. Faamu y’amasannyalaze g’enjuba eya MW 100 ng’ekendeeza ku bitundu 8% ku kasasiro akola buli mwaka nga GWh 14 buli mwaka-ebalirirwamu obukadde bwa ddoola 500,000-1.2 okusinziira ku kifo.
Emitendera egy’enjawulo egy’okuyingira kw’amasoboza agazzibwawo mu kitundu kyo ekigere ekya giridi gikulu nnyo okusinga average z’eggwanga. Faamu y’amasannyalaze g’enjuba mu Iowa, empewo gy’etera okufuga omulembe, eyolekedde enkyukakyuka ez’enjawulo okusinga emu mu Arizona ng’okuvuganya okutono ku by’amasannyalaze agazzibwawo. Okuyingira kw’amasannyalaze agazzibwawo mu kitundu okusukka ebitundu 45-50% kuleeta enjawulo ezesigika mu miwendo enkola z’okutereka ze zisobola okukozesa mu ngeri ey’amagoba.
Ebifo by’amakolero n’ebyobusuubuzi ebirina ssente ennyingi ezisasulwa mu bwetaavu biganyulwa mu kutereka ku mitendera egya wansi egy’okuyingira kw’amasannyalaze agazzibwawo. Ebifo omuli ssente z’obwetaavu obw’oku ntikko zikiikirira ebitundu 30-50% ku ssente zonna ezisaasaanyizibwa ku masannyalaze bisobola okutuuka ku biseera by’okusasula eby’emyaka 5-8 ne bwe biba nga tebirina kukola masannyalaze gazzibwawo mungi. Enkola za bbaatule ezirina sayizi okusenya essaawa 2-3 zokka ez’obwetaavu obw’oku ntikko zisobola okumalawo emitendera gyonna egy’okusasula obwetaavu.
Ebifo ebiteekebwa ku mudumu n’eby’ewala biraga ensonga ezitegeerekeka obulungi ez’okutwala amangu enkola z’okutereka amaanyi ag’amasannyalaze agazzibwawo awatali kulowooza ku nsaasaanya y’ensimbi. Ebitundu ebyesigama ku jenereta za dizero bisasula doola 0.40-$0.80 buli kWh. Enkola z’okutereka amasannyalaze g’enjuba-plus- zituuka ku nsaasaanya eya levelized eya $0.15-$0.30 buli kWh mu bifo ebisinga obungi, nga ziwa okukekkereza okunene ennyo ne ku bbeeyi ya bbaatule eriwo kati. Ebitundu ebisukka mu 50% ku bantu b’ensi yonna mu nsi ezitakulaakulana tebalina masannyalaze geesigika-okutereka kisobozesa amasannyalaze agazzibwawo okutuuka ku bantu bano.
Enkola za microgrid zeetaaga okutereka kumpi okusinziira ku ntegeeza. Ebizinga nga Hawaii ne Kauai biraga omuze guno: pulojekiti ya Lawai Solar Project ekola amasannyalaze ga MWh 100 egatta bbaatule n’amasannyalaze g’enjuba okukuuma omukutu nga gunywevu. Nga omugabo oguzzibwa obuggya bwe gusukka ebitundu 70-80% mu giridi ezeetongodde, okutereka kufuuka okwetaagisa mu by’ekikugu okusinga okubeera okw’okwesalirawo mu by’enfuna. Enkola zino zeetaaga okutereka okukuuma okulungamya kwa frequency n’obutebenkevu bwa vvulovumenti.
Ebivaako Enkola n’Ebiragiro
Ebisikiriza ebya federo, eby’amasaza, n’eby’amasannyalaze bikwata nnyo ku budde obulungi obw’okussaawo enkola z’okutereka amaanyi ag’amaanyi agazzibwawo. Etteeka lya Amerika erikendeeza ku bbeeyi y’ebintu erya 30% Investment Tax Credit eri enkola z’okutereka ebintu ezitali za bulijjo lyatandika okukola mu 2023 era mu kiseera kino ligenda mu maaso okutuuka mu 2032 ng’emiwendo gigenda gikendeera oluvannyuma. Kino kireeta ekisikiriza ekitegeerekeka okussaawo nga 2026 tannatuuka ng’ebbanja litandise okuva ku ntebe.
Ebiragiro ku ddaala lya gavumenti-bigenda byeyongera. California eragidde okutereka 52 GW omwaka 2045. New York yakwata enteekateeka y’ekkubo egenderera okuteeka mu nkola okutereka okw’ekiseera ekiwanvu-ekinene. Massachusetts, New Jersey, ne Nevada zitaddewo ebiruubirirwa by’okugula amaterekero okuva ku MW 1,500-3,000. Ebiragiro bino biraga nti amakampuni agakola ku by’amasannyalaze gajja kukola endagaano n’amaanyi okusobola okutereka, kireetewo embeera ennungi mu katale.
Amateeka agafuga okupima obutimba bw’ebikozesebwa n’okuliyirira bikosa nnyo okusalawo ku biseera by’okusula n’ebyobusuubuzi. California okukyuka okuva ku NEM 2.0 okudda ku NEM 3.0 mu April 2023 yakendeeza ku kuliyirirwa kw’amasannyalaze g’enjuba ebweru w’eggwanga ebitundu 70-80%, ekifuula okutereka okwetaagisa mu by’enfuna by’enjuba mu maka. Amasaza amalala 15 geekenneenya amateeka agafuga okupima obutimba. Singa obuyinza bwo bulowooza ku nkyukakyuka ezifaananako bwe zityo, okuteekawo okutereka nga amateeka tegannaba kukyuka mu ngeri entuufu bajjajja ebyenfuna ebirungi.
Enkyukakyuka mu nkola y’okuyungagana zisobola okwanguya oba okulwawo obudde obulungi. Ebitongole ebimu kati byetaaga pulojekiti empya ennene-ez’amasannyalaze g’enjuba n’empewo okussaamu obusobozi obutono obw’okutereka oba okulaga okuyamba mu kutebenkera kw’omukutu. Okutuukiriza ebisaanyizo bino mu kiseera ky’okuzimba okusooka kigula ssente ntono nnyo okusinga okuddamu okuzimba oluvannyuma lw’okutandika okukola.
Amasaza ga Amerika agawerako gawa eby’okutereka ebirala-ebisikiriza ebitongole okusukka okukendeeza ku musolo gwa federo. Oregon egaba ssente eziddizibwa ssente ezituuka ku doola 2,500 buli maka. Massachusetts egaba enteekateeka ya Connected Solutions nga esasula doola 200-350 buli kW buli mwaka olw’okwetaba mu kuddamu obwetaavu. Omusolo gwa New York ogwa Value of Distributed Energy Resources guliyirira okutereka olw’empeereza z’amasannyalaze eziwera. Okutuuma ebisikiriza bino n’ebbanja lya gavumenti eya wakati kiyinza okukendeeza ku nsaasaanya y’enkola entuufu ebitundu 40-60%.
Enkola z’okulondamu ensengeka y’okussaako
Okuteeka mu nkola enkola z’okutereka amaanyi mu mitendera ku masannyalaze agazzibwawo kiwa ekkubo erya wakati wakati w’okulinda ekiseera ekitali kigere n’okwewaayo mu bujjuvu leero. Abakola bangi bateeka ebitundu 25-30% ku busobozi bw’okutereka obusembayo mu kusooka, nga batereka ekifo n’okuteeka ebikozesebwa okusobola okugaziya mu biseera eby’omu maaso. Enkola eno ekwata ebisikiriza n’enyingiza mu kiseera kino ate ng’ekuuma enkyukakyuka mu kukendeeza ku nsaasaanya mu biseera eby’omu maaso.
Enkola za co-location zaawukana okusinziira ku tekinologiya azzibwa obuggya. Pulojekiti z’amasannyalaze g’enjuba zitera okuganyulwa mu kuteekawo essaawa 0.5-1.0 ez’okutereka buli MW y’amasannyalaze g’enjuba mu kusooka. Pulojekiti z’empewo ziyinza okutandika n’essaawa 0.3-0.7 buli MW okusinziira ku milembe gyazo egy’enjawulo. Emigerageranyo gino giwa empeereza ya grid ey’amakulu awatali kuzimba kutereka kusukkiridde okusinziira ku mulembe.
Ensengekera ezimu ezisinga obulungi esinziira ku kukula kwa pulojekiti yo ey’amasannyalaze agazzibwawo. Pulojekiti empya ezizzibwa obuggya zirina okubeeramu okutereka mu dizayini esooka ne bwe kiba nga si kussaamu mangu obusobozi obujjuvu. Ebifo ebiriwo ebizzibwa obuggya birina okwekenneenya okutereka nga byolekedde okusalawo okuddamu amaanyi, okulongoosa enkolagana, oba okuddamu okuteesa ku ndagaano. Ensonga zino ez’obutonde ez’okusalawo ziwa emikisa okuddamu okwekenneenya ebyenfuna by’okutereka awatali kukaka kukola nga bukyali.
Enkola z'okutereka ezesigamiziddwa ku modulo- zisobozesa okulinnyisa mpolampola. Abagaba bbaatule nga Fluence ne Wartsila bawa enkola za bbaatule eziteekeddwa mu konteyina eziyinza okugattibwako buli lukya ng’obwetaavu oba ebyenfuna bitereera. Okutandika ne konteyina emu eya MWh 2-4 n’okwongerako endala buli mwaka kiwa obusobozi bw’okuteeka mu nkola ate nga tukuuma omutindo gw’ebyuma.
Ekiseera ekituufu eky’okussaako ku nkomerero kigerageranya ensonga ssatu: amagoba mu by’enfuna mu kiseera kino, ebisuubirwa mu nsaasaanya mu biseera eby’omu maaso, n’obwetaavu bw’emirimu. Pulojekiti okukendeeza oba okukyukakyuka kw’emiwendo gye kwakwata edda enyingiza zirina okuteekebwa kati. Pulojekiti mu mbeera ezitebenkedde nga zirina enkyukakyuka emala ku mudumu zisobola okulinda emyaka 1-3 mu ngeri entuufu okwongera okukendeeza ku nsaasaanya. Pulojekiti ezisemberera obwetaavu obw’omubiri olw’okuyingira kw’amasannyalaze agazzibwawo amangi zirina okuteekebwawo awatali kulowooza ku by’enfuna.
Ebibuuzo Ebitera Okubuuzibwa
Omutendera ki ogw’okuyingira mu by’amasannyalaze agazzibwawo ogwetaagisa okutereka?
Okutereka mu bujjuvu kufuuka okusikiriza mu by’enfuna ng’okuyingira kw’amasannyalaze agazzibwawo okukyukakyuka kusukka ebitundu 30-40% ku busobozi bw’okukola amasannyalaze gonna. Obwetaavu obw’ekikugu buvaayo okwetoloola ebitundu 60-70% okuyingira ng’ebizibu by’okukyukakyuka mu mudumu bikoma ku kugatta kw’amasannyalaze okuzzibwawo okw’enjawulo awatali buwagizi bwa kutereka.
Nninde bbanga ki ssente za bbaatule okwongera okukka?
Ssente za bbaatule zakka ebitundu 40% mu 2024 kyokka abakugu bateebereza nti buli mwaka zikendeera ebitundu 2-3% okugenda mu maaso okusinga ebitundu 10-15% ebyalabibwa mu myaka egiyise. Okulinda emyaka egisukka mu 2-3 kiri mu bulabe bw’okutereka okutono okw’okwongerako ate nga osubwa ebisikiriza ebiriwo kati n’emikisa gy’okuyingiza ssente.
Nsobola okwongera okutereka ku pulojekiti eziriwo ezizzibwa obuggya?
Yee, wadde ng’okuzzaawo enkola z’okutereka amaanyi ag’amaanyi agazzibwawo kigula ebitundu 15-25% okusinga okutereka ebizimbe mu kiseera ky’okuzimba okusooka. AC-coupled storage ekola ku retrofits ezisinga naye etuuka ku bulungibwansi obutono okusinga DC-coupled systems designed in okuva ku ntandikwa. Ebyetaago by’olukusa n’okuyungibwa byawukana nnyo okusinziira ku kifo n’obunene bwa pulojekiti.
Ebbanga ki ly’okutereka erikola amakulu eri ebika eby’enjawulo ebizzibwa obuggya?
Ebifo ebiteekebwamu amasannyalaze g’enjuba mu bujjuvu byetaaga essaawa 2-4 ez’obudde okusobola okukwata omuwendo gw’ebyenfuna ogusinga obungi nga bikyusa omulembe gw’emisana okudda ku ntikko ez’akawungeezi. Ebifo eby’empewo okutwalira awamu byetaaga essaawa 6-8 kubanga enkola z’empewo zaawukana nnyo mu ngeri etategeerekeka mu lunaku. Pulojekiti za hybrid solar-plus-wind oluusi zisobola okulongoosa nga zirina enkola ez’essaawa 4-6 okusinziira ku nkolagana yazo ey’omulembe.