"Yɛde battery storage rebɛka yɛn solar project no ho. So ɛsɛ sɛ yɛde di dwuma."AC a ɛka bom anaa DC a ɛka bom?"
Mmuae no fi ase wɔ asɛmmisa biako so: ɛhe na batere no di nkitaho bere a wɔde toto owia inverter no ho no?
Wɔ AC-coupled system mu no, battery no di nkitaho wɔ AC fã-bere a wɔadan owia ahoɔden akyi. Wɔ DC-coupled system mu no, battery no di nkitaho wɔ DC fã, ansa na wɔadan tumi no akɔ AC.
Saa nsonsonoe yi ka retrofit complexity, charging flexibility, ne nsakraeɛ stages dodoɔ a ɛda PV system ne battery no ntam.
Adansi abien no mu biara nyɛ papa wɔ amansan nyinaa mu. Paw a ɛfata no gyina nneɛma anum so: adwuma no fã, fibea a wɔbɔ ka, ahofadi ahiade, grid anohyeto, ne ntrɛwmu nhyehyɛe.
Sɛnea AC-Coupled BESS Yɛ Adwuma
Wɔ AC-coupled nhyehyɛe mu no:
- Owia ahoɔden a wɔde yɛ nneɛmagenerate DC ahoɔden.
- PV inverter no dane no ma ɛbɛyɛ AC ahoɔden.
- Battery no nam dedicated so na ɛka AC bɔs no hotumi a wɔdannan no wɔ akwan abien so (PCS) ..
- PV nhyehyɛe ne BESS hyia wɔ AC fã.
Owia charge kwan: PV nhyehyɛe → PV inverter → AC bɔs →bidirectional PCS→ batere
Saa mpaepaemu yi taa ma retrofit nkabom ne ahofadi adwumayɛ yɛ mmerɛw. Nanso, owia ahoɔden fa nsakrae pii mu ansa na adu batere no ho.
Sɛnea DC-Coupled BESS Yɛ Adwuma
Wɔ DC-coupled nhyehyɛe mu no:
- PV array ne battery no di nkitaho ansa na wɔadan tumi no ayɛ no AC.
- Owia ahoɔden betumi adu batere a ɛwɔ DC fã no a wonni kan nsakra no nkɔ AC.
- Nhyehyɛe abien no kyɛ anaasɛ ɛhyehyɛ tumi nsakrae fã no.
- Ɛsɛ sɛ DC voltage, inverter tumi, ne control logic yɛ biako wɔ nhyehyɛe no nyinaa mu.
PV kwan: PV nhyehyɛe → DC/DC anaa MPPT → DC bɔs a wɔtaa de di dwuma → hybrid PCS anaa inverter → AC bɔs
Battery kwan: Battery ↔ DC bɔs a wɔtaa de di dwuma
Wei betumi ama PV-kɔ-batere nsakrae kwan no ayɛ tiaa na aboa clipped-ahoɔden a wɔsan nya wɔ tebea horow a ɛfata mu. Nanso, ɛsɛ sɛ wɔbom yɛ batere, inverter, DC voltage, ne control system no.
Hyɛ no nsow: DC Battery Nkyerɛ sɛ DC Coupling no ankasa
Batere nyinaa de DC anyinam ahoɔden sie. Nanso, batere no ankasa nkyerɛ ɔkwan a adwuma no fa so de bata ho.
- Battery container → PCS a wɔahyira so → AC bɔs: adwuma no betumi ayɛ AC-coupled.
- PV ne batere → DC nhyehyɛe a wɔkyɛ → inverter a wɔtaa de di dwuma: eyi yɛ DC-owia a ɛka bom-plus-adekora nhyehyɛe a wɔtaa yɛ.
Ɔkwan a wɔfa so de ka bom no gyina anyinam ahoɔden nhyehyɛe no nyinaa so.
AC-Aka abom vs DC-Aka abom BESS wɔ Ahwɛyiye mu
Nkitahodi beae no kyerɛkyerɛ sɛnea adansi biara yɛ adwuma mu. Ɛsan nso ka sɛnea wɔde nhyehyɛe no bom, wɔbɔ ho ka, wɔde di dwuma, na wɔtrɛw mu. Table a ɛwɔ aseɛ ha yi bɔ adwuma titire-level nsonsonoeɛ no mua.
| Dwumadie no Factor | AC-BESS a wɔaka abom | DC-BESS a wɔaka abom |
| Nkitahodi beae | PV ne BESS hyia wɔ AC afã | PV ne BESS na ɛka bom wɔ DC fã no |
| Tumi a wɔsakra no | Tetew PV inverter ne battery PCS mu | Shared anaa nhyehyɛe inverter stage |
| PV retrofit a ɛwɔ hɔ dedaw | Mpɛn pii no ɛyɛ mmerɛw sɛ wode bɛka ho a wonsan nsusuw PV DC nhyehyɛe no ho | Ebia ɛbɛhwehwɛ sɛ wɔyɛ nsakrae wɔ PV nhyehyɛe a ɛwɔ hɔ dedaw no mu |
| PV-kɔ-batere kwan so | Owia ahoɔden fa nsakrae ahorow pii mu | Ebia owia ahoɔden bɛfa batere no mu denam nsakrae kakraa bi so |
| Grid a wɔde gye sika | Mpɛn pii no, ɛyɛ mmerɛw kɛse denam batere PCS no so | Ɛgyina converter topology ne control design so kɛse |
| Clipped-ahoɔden a wɔsan nya | Limited denam PV inverter a ɛba no so | Ebia wɔbɛkyere PV a wɔatwitwa no wɔ tebea horow a ɛfata mu |
| Oprehyɛn a ɛde ne ho | Mpɛn pii no, PV ne BESS tumi yɛ adwuma na wɔhwɛ so yiye wɔ ahofadi mu | PV ne BESS yɛ nea wɔayɛ no biako kɛse |
| Daakye ntrɛwmu | Mpɛn pii no wobetumi atrɛw PV ahoɔden, PCS ahoɔden, ne batere ahoɔden mu wɔ ɔkwan soronko so | Ɛsɛ sɛ ntrɛwmu susuw DC voltage ne shared inverter anohyeto ahorow ho |
Anamɔn 1 - So Eyi yɛ Dwumadi Foforo anaasɛ PV Nhyehyɛe a Ɛwɔ Hɔ Dedaw?
Adwuma no mfiase yɛ nneɛma a edi kan a ɛma...AC-a wɔaka abom vs DC-a wɔaka abomnkarihwɛ.
Bere a PV Plant no Yɛ Adwuma Dedaw
Sɛ wopɛ PV adwumayɛbea a ɛreyɛ adwuma a, hwɛ:
- PV inverter a wɔde yɛ adwumatebea ne ɔsom nkwa nna a aka
- AC bɔs ne transformer tumi
- Switchgear ne ahobammɔ nhyehyɛe
- Point of interconnection (POI) ne tumi anohyeto ahorow
AC a wɔde ka bomwɔtaa di kan hwehwɛ mu efisɛ PV inverter ne DC architecture a ɛwɔ hɔ dedaw no taa tumi kɔ so tra hɔ. Afei BESS no betumi afa PCS a wɔatu ho ama a ɛfa akwan abien so so abɔ mu.
Eyi betumi atew PV-fã a wɔsan yɛ no foforo so. Nanso, ɛho da so ara hia sɛ wɔhwɛ sɛnea transformer tumi, ahobammɔ nhyehyɛe, ne grid anohyeto ahorow no yɛ nokware.
Owia + Nneɛma a Wɔkora So Dwumadi Foforo
Adwuma foforo bi ma wotumi susuw adansi abien no nyinaa ho fi mfiase.
Ɛsɛ sɛ ntotoho a edi kan no twe adwene si sɛ ebia adwuma no de:
- Inverter stage a wɔkyɛ anaasɛ wɔayɛ no biako
- Tetew PV inverter ne battery PCS mu
- PV–battery a wɔde ka bom a ɛyɛ den
- Ahofadi kɛse a ɛwɔ adwumayɛ mu
Wɔasusuw sika a wɔbɔ ho nhyehyɛe, adwumayɛ ho ahwehwɛde, grid anohyeto, ne ntrɛwmu nhyehyɛe no ho wɔ anammɔn a edidi so yi mu.
Nneɛma titiriw a wɔde kɔ:PV retrofits a ɛwɔ hɔ dedaw no taa ma AC coupling no mu duru kɛse. Wɔ owia-plus-adekora adwuma foforo ho no, ɛsɛ sɛ adansi abien no nyinaa bue ma nhwehwɛmu foforo.
Anamɔn 2 - Dɛn na Ɛbɛyɛ Ahoɔden Kwan Titiriw?
Asɛmmisa a edi hɔ wɔ anAC a ɛka bom vs DC a ɛka bomnhwehwɛmu yɛ sɛnea ahoɔden bɛkɔ batere no mu.
Bere a PV Ne Charging Fibea Titiriw
Ɛsɛ sɛ adwuma a PV-di so di kan si so dua:
- Owia ahoɔden a ɛboro so anaasɛ inverter clipping a ɛwɔ hɔ
- BatereƆman a Wɔde Di Dwuma (SOC) .headroom ne ahoɔden a wɔde charge
- Anohyeto a wɔde ma wɔ nneɛma a wɔde kɔ amannɔne ho
- Sɛ́ ebia ahoɔden a wɔakora so no wɔ mfɛnsere a ɛsom bo a wɔde fi mu
Wɔ eyi mu no, .DC a wɔde ka bomɛfata sɛ wɔhwehwɛ mu yiye. DC-owia nhyehyɛe a ɛka bom betumi ama PV-kɔ-batere nsakrae kwan no ayɛ tiaa na akyere ahoɔden a wɔatwitwa wɔ tebea horow a ɛfata mu. Nanso, mfaso no ba bere a batere no wɔ hɔ a ɛbɛtwe saa ahoɔden no na ebetumi ayi afi mu akyiri yi de ayɛ atirimpɔw bi a mfaso wɔ so nkutoo.
Bere a Ɛho Hia sɛ Wɔde Grid Charging a Ɛyɛ Flexible
Ebia grid charging ho hia ma:
- Peak shaving a wɔde yi wɔn ti
- Ahoɔden ho arbitrage
- Mmuae a wɔhwehwɛ
- Grid dwumadie ahodoɔ
Ɛsɛ sɛ adwuma no nso si anohyeto a ɛfa nneɛma a wɔde ba amannɔne, tow ne mita ho mmara, neAhoɔden a Wɔde Di Dwuma Ho Nhyehyɛe (EMS) .dispatch ahwehwɛde ahorow.
Wɔ eyi mu no, .AC a wɔde ka bommpɛn pii no ɛma wotumi yɛ nsakrae kɛse. Battery PCS a wɔatu ho ama ma BESS no tumi charge na ɔde kɔ a ɛnyɛ PV awo ntoatoaso a ɛde ne ho kɛse.
Nneɛma titiriw a wɔde kɔ:Charging fibea titiriw no boa ma wɔtew paw no so: direct PV charging hyɛ asɛm no mu den ma DC coupling, bere a flexible grid charging hyɛ asɛm no mu den ma AC coupling.
Anamɔn 3 - So Ɛsɛ sɛ PV ne BESS Yɛ Adwuma wɔ Wɔn Ho?
Asemmisa a edi hɔ ne sɛ ebia ɛsɛ sɛ PV nhyehyɛe ne BESS yɛ adwuma sɛ agyapade a ɛsono emu biara.
Bere a Independent Operation Ho Hia no
Ebia eyi ka ho ne:
- PV kɔ so yɛ adwuma wɔ bere a BESS ayɛ adwuma no
- Independent grid charge ne nea wɔde mena
- Tetew nhyehyɛe ahorow a wɔde siesie nneɛma mu
- Wɔde wɔn ho hyɛ mu a wɔde wɔn ho hyɛ grid dwumadie mu
- PV, PCS, ne battery ahoɔden ntrɛwmu a ɛtetew mu
Architecture akwankyerɛ: AC coupling taa ma wotumi yɛ nsakrae kɛse.
PV inverter ne battery PCS no de nsakrae akwan ahorow di dwuma. Eyi ma ɛyɛ mmerɛw sɛ wɔbɛyɛ nhyehyɛe a wɔde di dwuma a wɔde wɔn ho, siesie, ne mfomso a wɔayi afi afoforo ho.
Bere a Shared Operation yɛ nea wogye tom
Wobetumi asusuw DC-coupled architecture ho bere a system nkabom a ɛbɛn no yɛ nea wogye tom.
Nhwehwɛmu atitiriw no bi ne:
- Inverter tumi a wɔkyɛ
- Bere koro mu PV output ne battery discharge
- Tumi anohyeto ahorow a wɔtaa de di dwuma
- Mfomso ne nsiesie nkɛntɛnso
- Nhyehyɛe a wɔhwehwɛ sɛ ɛwɔ hɔ
Nkabom a ɛbɛn no betumi ama PV-kɔ-batere kwan no ayɛ tiaa. Nanso, inverter a wɔkyɛ no nso betumi ama anohyeto biako aba ama adwumayɛ ne nea ɛwɔ hɔ.
Nneɛma titiriw a wɔde kɔ:AC coupling taa ma mfasoɔ berɛ a PV nhyehyɛeɛ ne BESS hwehwɛ sɛ wɔde wɔn ho yɛ adwuma, siesie, anaa wɔde wɔn ho hyɛ gua so. Nea ɛne no bɔ abira no, wobetumi de DC coupling adi kan sɛ anohyeto ahorow a ɛwɔ nhyehyɛe a wɔkyɛ mu no yɛ nea wogye tom na adwuma no de PV- a ɛkorɔn di kan kɔ-batere a ɛyɛ adwuma yiye ne mfiri ho ka a ɛba fam-sɛ wodi nhyehyɛe tebea pɔtee bi ho dwuma a.
Anamɔn 4 - Dɛn na Grid Nkitahodi no Ma Ho Kwan?
Grid nkitahodi ahwehwɛde ahorow no nya adansi a wɔpaw no so nkɛntɛnso tẽẽ. Sɛ mpo wɔayɛ PV ne ahoɔden akoraeɛ nhyehyɛeɛ no yie-a, ebia adwuma no da so ara rentumi nyɛ adwuma sɛdeɛ wɔhwɛɛ kwan sɛ grid nkitahodiɛ tebea no ntumi mmoa a.
Nkitahodi Beae ne POI
Fi ase denam si a wubesi so dua so:
- Grid nkitahodi ahoɔden
- Sɛ ebia step-up transformer ho hia anaa
- Mita beae ne nhyehyɛe
- Anohyeto a ɛfa nneɛma a wɔde ba amannɔne ne nea wɔde kɔ amannɔne ho
- Sɛ ebia PV nhyehyɛe ne BESS no kyɛ POI koro
Wɔ AC-coupled system mu no, PV inverter ne battery PCS no de ahoɔden fa nsakraeɛ akwan ahodoɔ so ansa na wɔaka abom wɔ AC fã. Wɔ DC-coupled nhyehyɛe a wɔtaa yɛ mu no, wɔde PV awo ntoatoaso ne batere ahoɔden ka bom wɔ DC bɔs no so na wɔde fa inverter a wɔkyɛ anaa wɔayɛ no biako so de kɔ amannɔne.
Saa adansi mu nsonsonoe yi ho hia bere a POI no bɛn ne tumi anohyeto no. Bere a inverter ne grid-nkitahodi tumi a wɔkyɛ no ma DC coupling no ho ka-tu mpɔn no, ebetumi nso asiw PV awo ntoatoaso a ɛsen biara ne battery a wɔde ahoɔden a edi mũ-bɔ bere koro mu no ano.
Transformer Tumi a Ɛwɔ Hɔ
Transformer tumi yɛ anohyeto ahorow a edi kan a ɛsɛ sɛ wohwɛ wɔ aaguadi ne mfiridwuma (C&I) BESSretrofit a wɔde yɛ adwuma.
Ɛsɛ sɛ wɔhwehwɛ transformer a ɛwɔ hɔ dedaw no mu hwɛ sɛ:
- Adesoa foforo bere a BESS rebɔ charge no
- Dan tumi a ɛsen bere a wɔretu no
- PV ne BESS adwumayɛ bere koro mu
- Tumi a wɔhwehwɛ sɛ wɔde ba amannɔne ne nea wɔde kɔ amannɔne
- Tumi a aka ne ɔsom nkwa nna
Sɛ transformer no ntumi mmoa ahoɔden a wɔayɛ ho nhyehyɛe no a, ebia adwuma no bɛhwehwɛ sɛ wɔde adwumayɛ anohyeto ahorow, nnwinnade a wɔayɛ no foforo, anaasɛ nkitahodi nhyehyɛe foforo. Ɛka foforo a wɔbɔ, baabi a wɔde besisi, ne adwuma no nhyehyɛe nso betumi aka adansi ho gyinaesi no.
Ahobanbɔ ne Medium-Voltage (MV) Nkabom
Sɛ wode BESS ka ho a, ɛsakra tumi a ɛsen no kwan ne ne dodow. Enti ɛsɛ sɛ wɔsan hwɛ ahobammɔ ne MV nhyehyɛe a ɛwɔ hɔ dedaw no mu.
Nhwehwɛmu atitiriw no bi ne:
- Inverter-gyina mfomso-mprempren su
- Relay ne ahobammɔ nhyehyɛe
- Nkitahodi a ɛda PV inverter ne battery PCS ntam
- MV switchgear tumi a ɛwɔ hɔ dedaw
- feeder anaa switchgear bay a ɛwɔ hɔ
- Mita ne nsiesie a wɔatew wɔn ho
AC-nhyehyɛe a wɔde abɔ mude battery PCS a ɛyɛ soronko ba AC network no so. Ɛsɛ sɛ wɔyɛ ne nkitahodi a ɛne transformer, PV inverter, ne ahobammɔ mfiri a ɛwɔ hɔ dedaw no ho nhyehyɛe.
DC-nhyehyɛe a wɔde abɔ muebia ɛwɔ AC interface a ɛwɔ mfinimfini kɛse. Nanso, DC-afã a wɔatew wɔn ho, inverter ahobammɔ a wɔkyɛ, ne huammɔdi nsunsuanso a ɛtaa ba no da so ara hwehwɛ sɛ wɔyɛ adwuma-nhwehwɛmu pɔtee. Adansi abien no mu biara mfi hia a ehia sɛ wɔyɛ ahobammɔ ho adesua no mfi hɔ.
Mfaso ne Nkitahodi a Wɔhwehwɛ
Ɛsɛ sɛ utility anaa interconnection apam no si so dua sɛ:
- Sɛ́ ebia wɔma kwan ma wɔde grid charge di dwuma anaa
- Tumi a ɛsen biara a wɔde ba amannɔne ne nea wɔde kɔ amannɔne
- Export-control ahwehwɛde ahorow
- Akwan abien grid adwumayɛ
- Mita ne nkitahodi ho mmara
- Mma ho kwan sɛ wɔde grid dwumadie bɛma
Saa ahwehwɛde ahorow yi betumi asesa adwumayɛ ho nhyehyɛe ne nnwinnade a wɔde di dwuma no tẽẽ.
Sɛ nhwɛso no, anohyeto a ɛba fam a wɔde kɔ amannɔne no betumi ama mfaso a ɛwɔ PV ahoɔden a ɛboro so a wɔkora so no akɔ soro. Nea ɛne eyi bɔ abira no, grid charging a wɔabara no betumi atew ahoɔden arbitrage anaa grid-a egyina adwumayɛ akwan afoforo so no bo so.
Dwumadie no ho afotuo: Bisa utility no nkitahodiɛ nhwehwɛmu kratasin no ntɛm wɔ adwuma no nkɔsoɔ mu. Ahobanbɔ, mita, export-control, nkitahodi, ne grid-service ahwehwɛde betumi asesa mfiri no kɛse ne architecture akwankyerɛ nyinaa.
Nneɛma titiriw a wɔde kɔ:Sɛ anohyeto ahorow a ɛwɔ POI tumi, transformer kɛseyɛ, ne nkitahodi nsɛm mu yɛ katee a, DC coupling ma mfaso soronko denam inverters a wɔkyɛ ne grid interfaces a wɔtew so. Nea ɛne no bɔ abira no, sɛ grid-nkitahodi tebea no yɛ nea ɛyɛ mmerɛw na ahofadi a wɔde bɛkɔ no yɛ ade titiriw a, AC coupling taa de adwumayɛ mu ahofadi kɛse ma.
Anamɔn 5 - Dɛn Ne Daakye Ntrɛwmu Nhyehyɛe?
Ɛnsɛ sɛ mfitiaseɛ adansiɛ no boa mprempren adwuma no kɛseɛ nko ara na mmom ɛsɛ sɛ ntrɛmu nhyehyɛeɛ a wɔhwɛ kwan no nso. Ansa na wobɛpawAC anaa DC a wɔde ka bom, kyerɛkyerɛ nea ebetumi akɔ soro daakye mu.
Battery Ahoɔden Pii Anaa PCS Tumi Pii?
Sɛ wode batere ahoɔden ka ho a, ɛma kWh a ɛwɔ hɔ no kɔ soro na ebetumi ama bere tenten a wɔde fi mu no atrɛw. Nanso, ɛnyɛ nea ɛma ahoɔden a wɔde yɛ adwuma no nkɔ soro ara kwa.
Ebia kW pii behia sɛ:
- PCS tumi foforo
- Battery current tumi a ɛkorɔn
- Transformer ne switchgear tumi pii
- Feeder anaa cable tumi foforo
- Ti a ɛdɔɔso a ɛwɔ baabi a nkitahodi (POI) wɔ no .
- Nkitahodi ho pene a wɔayɛ mu nsakrae
Enti ɛsɛ sɛ adwuma no kyerɛ nsonsonoe a ɛda ahoɔden a wɔde bɛka ho, ahoɔden a wɔde bɛka ho, anaa abien no nyinaa a wɔde bɛka ho ntam. Saa nsonsonoe yi ka ntrɛwmu kwan no tẽẽ.
AC Nkɔanim
AC augmentation de BESS block foforo a ɛwɔ n’ankasa PCS wɔ AC afã ka ho.
Saa kwan yi betumi aboa staged expansion a nsakraeɛ kakraa bi na ɛwɔ mfitiaseɛ PV DC architecture no mu. Sɛ transformer ne POI no wɔ headroom a ɛdɔɔso a, wobetumi de BESS block foforo aka ho a wɔrensesa PCS a ɛwɔ hɔ dedaw no tumi.
Eyi betumi ama ayɛ mmerɛw sɛ wode battery ahoɔden, PCS ahoɔden, BESS blocks a edi mũ, anaasɛ PV inverter tumi a ɛtetew mu bɛka ho wɔ akwan horow so.
Nanso, AC-fã ntrɛwmu da so ara gyina site-level tumi so. Ɛsɛ sɛ wɔsan hwɛ transformer headroom, medium-voltage equipment, feeder tumi, ahobanbɔ nhyehyɛe, EMS nkabom, ne import ne export anohyeto nyinaa.
AC coupling boa modular ntrɛwmu, nanso ɛnyi grid-nkitahodi anaa nnwinnade anohyeto ahorow mfi hɔ.
DC Nkɔanim
DC augmentation de battery tumi ka DC architecture a ɛwɔ hɔ dedaw a ɛwɔ PCS anaa inverter a wɔkyɛ akyi no ho.
Eyi betumi aboa ma wɔde PV ne batere ahoɔden ayɛ biako kɛse, nanso ɛsɛ sɛ mfiri foforo no kɔ so ne DC nhyehyɛe a ɛwɔ hɔ dedaw no hyia. Nhwehwɛmu atitiriw no bi ne:
- DC adwumayɛ voltage range
- DC mprempren a ɛsen biara
- Inverter a wɔkyɛ mu ti
- Battery adwumayɛ mfɛnsere
- DC/DC converter tumi a ɛwɔ hɔ
- Batere a wɔde di dwuma ho nhyehyɛe (BMS) .nkutahodie
- Di logic ne EMS a ɛne ne ho hyia so
Mpɛn pii no, inverter a wɔkyɛ no ne anohyeto titiriw. Batere ahoɔden foforo betumi atrɛw bere a wɔde fi mu no mu, nanso sɛ inverter no ahyɛ mu ma dedaw a, entumi mma AC a ɛba no nkɔ soro.
Nsonsonoe a ɛwɔ battery chemistry, thermal management, voltage window, anaa nkitahodi protocol mu no betumi ahwehwɛ sɛ wɔyɛ DC/DC converter foforo anaasɛ nhyehyɛe foforo a ɛtrɛw. Eyi betumi ama adwuma no ho ka ne nsakrae a wɔhwere nyinaa akɔ soro.
Daakye PV Ntrɛwmu
Ɛsɛ sɛ wɔde daakye PV nhyehyɛe no ka BESS ntrɛwmu nhyehyɛe no ho hwɛ. Wɔ AC-coupled system mu no, wɔtaa tumi fa PV inverter a ɛyɛ soronko so de PV tumi foforo abɔ mu. Eyi taa nya nkɛntɛnso kɛse wɔ batere ne PCS nhyehyɛe a ɛwɔ hɔ dedaw no so.
Wɔ DC-coupled system mu no, ɛsɛ sɛ PV tumi foforo kɔ so ne nea ɛwɔ hɔ dedaw no hyia:
- DC voltage ne mprempren anohyeto ahorow
- DC/DC converter tumi a ɛwɔ hɔ
- Inverter tumi a wɔkyɛ
- Control nhyehyɛe ahorow
- PV ne battery a wɔde di dwuma bere koro mu
Sɛ wɔhwɛ kwan sɛ PV ne battery ahoɔden bɛbom atrɛw a, DC coupling betumi akɔ so afata, sɛ wɔde headroom a ɛdɔɔso asie wɔ shared inverter ne DC architecture no mu a.
Transformer, POI, ne Tumi a Wɔde Di Dwuma
Ɛmfa ho ɔkwan a wɔfa so de ka bom no, ntrɛwmu betumi ama adesoa a wɔde charge, ahoɔden a wɔde fi mu, ne mfiri dodow a wɔhwɛ so no akɔ soro.
Ɛsɛ sɛ adwuma no si so dua sɛ:
- Transformer no betumi aboa daakye charging ne discharge ahoɔden
- POI no wɔ tumi a ɛdɔɔso a ɛfa nneɛma a wɔde ba amannɔne ne nea wɔde kɔ amannɔne
- EMS no wɔ interfaces a ɛdɔɔso, data tumi, ne control tumi
- Ahobammɔ ne nkitahodi ho pene a wɔpene so no betumi aboa nhyehyɛe a wɔatrɛw mu no
Sɛ transformer anaa POI no bɛn ne anohyeto dedaw a, ebia architecture biara bɛhwehwɛ sɛ wɔyɛ nnwinnade no foforo, adwumayɛ anohyeto, anaa grid-nkitahodi mu nhwehwɛmu foforo.
Nneɛma titiriw a wɔde kɔ:Sɛ daakye ntrɛwmu titiriw de battery ahoɔden ka ho na modular flexibility ho hia a, AC coupling taa boa incremental ntrɛwmu mmerɛw. Sɛ daakye PV ne battery tumi bɛbom anyin na nsakraeɛ a ɛyɛ adwuma yie da so ara yɛ adeɛ a ɛdi kan a, ebia DC coupling da so ara fata berɛ a DC voltage ne shared inverter tumi no hyia yie. Sɛ POI yɛ ntrɛwmu anohyeto titiriw a, architecture abien no nyinaa hwehwɛ sɛ wɔyɛ grid-nkitahodi nhwehwɛmu foforo.
Nhyehyɛe no a wɔde bɛtoto Dwumadie no mu Nsɛm a Wɔtaa Yɛ
Sɛ wobua nsɛmmisa anum a ɛwɔ atifi hɔ no wie a, mpɛn pii no, adansi ho akwankyerɛ no mu da hɔ pefee.
Nanso, nea efi mu ba no nyɛ pɛ wɔ adwuma biara mu. PV retrofit a ɛwɔ hɔ dedaw, C&I owia ahoɔden-plus-adekora nhyehyɛe foforo, ne autility-scale co-a ɛwɔ adwuma no muebia emu biara bɛhwehwɛ sɛ ɛsono baabi a wobefi ase.
Table a ɛwɔ aseɛ ha yi kyerɛ sɛdeɛ nhyehyɛeɛ no fa saa nsɛm mmiɛnsa a ɛtaa ba yi ho.
| Dwumadie no ho Nsɛm a Ɛfa Ho | Akwankyerɛ a Wɔde Fi Ase | Ade titiriw nti a ɛte saa |
| C&I Owia Retrofit a ɛwɔ hɔ dedaw | Di kan susuw AC coupling ho | PV inverter a ɛwɔ hɔ dedaw no taa tumi tra hɔ bere a wɔde BESS no ka ho denam PCS a wɔatu ho ama so |
| C&l Owia +Akorae Foforo | Fa adansi abien no nyinaa toto ho | Ɛsɛ sɛ nhyehyɛe no kari pɛ wɔ PV charge tẽẽ, grid charge a ɛyɛ mmerɛw, adwumayɛ a ɛde ne ho, ne daakye ntrɛwmu |
| Utility-Scale Co-Ɛwɔ PV + BESS | Yɛ akwan abien no nyinaa ho nhwɛso | Clipping recovery, POI anohyeto, shared inverter capacity, dispatch strategy, ne project sikasɛm betumi asesa nea efi mu ba |
Eyinom yɛ akwankyerɛ ahorow a wɔde fi ase, na ɛnyɛ nyansahyɛ ahorow a etwa to. Transformer tumi, grid anohyeto, adwumayɛ ho nhyehyɛe, ne daakye ntrɛwmu da so ara betumi asesa architecture a wɔpaw.
Dwumadie no ho nsɛm a wɔhwehwɛ ansa na wɔapaw Architecture
Anum-anammɔn nhyehyɛe no betumi atew akwankyerɛ no so. Nanso, architecture nyansahyɛ a etwa to da so ara hwehwɛ project-specific data.
| Amanneɛbɔ Kuw | Nsɛm a Ɛkɔ Akyiri a Ɛsɛ sɛ Wɔde Ma |
| Dwumadie no su | Dwumadi foforo anaa PV retrofit a ɛwɔ hɔ dedaw |
| PV nhyehyɛe | PV tumi, DC/AC ratio, ne inverter nhwɛso |
| BESS botaeɛ | Tumi a wɔhwehwɛ, ahoɔden a wɔde yɛ adwuma, ne bere tenten a wɔde fi mu |
| Ahoɔden ho nhyehyɛe | Main charging source, adwumayɛ akwan, ne backup ahwehwɛde ahorow |
| Grid nkitahodi | Grid voltage, POl, ne import/export anohyeto |
| Nnwinnade a ɛwɔ hɔ dedaw | Transformer, switchgear, ahobammɔ nhyehyɛe, ne tumi a ɛwɔ hɔ |
| Electrical ho nkrataa | Ntrɛwmu biako-ntrɛwmu mfonini a ɛwɔ hɔ dedaw anaasɛ wɔahyɛ ho nyansa |
| Daakye ahwehwɛde ahorow | Ntrɛwmu nhyehyɛe, gyinapɛn a ɛfata, ne grid-som botae ahorow |
Saa nsɛm yi boa ma wohu sɛ ebia mfitiase adansi akwankyerɛ no yɛ nea mfaso wɔ so wɔ mfiridwuma mu anaa. Sɛ wonni hɔ a, wobetumi akyerɛkyerɛ nsonsonoe a ɛda AC ne DC nkitahodi ntam wɔ ɔkwan a ɛkɔ akyiri so no mu, nanso wontumi mfa nyansahyɛ a etwa to a ɛyɛ asɛyɛde mma.
Ansa na wobewie adansi no, ɛsɛ sɛ wɔhwehwɛ nsusuwii abiɛsa a wɔtaa susuw nso mu.
Nsusuwii Abiɛsa a Ebetumi Ama Woapaw Nea Ɛnteɛ
Sɛ wɔde adwuma no ho nsɛm a wɔhwehwɛ mpo di dwuma a, nsusuwii kakraa bi a wɔtaa nya no da so ara tumi kyinkyim adansi ho gyinaesi no.
"DC Coupling Yɛ Yie Bere Nyinaa".
DC coupling betumi atew nsakraeɛ a ɛyera wɔ PV-to-battery kwan no so, nanso adwumayɛ yie nyinaa nso gyina adwumayɛ kwan, susudua hyeɛ, ne aboafoɔ a wɔde di dwuma so. Ɛnyɛ bere nyinaa na nsakrae kwan tiawa no kyerɛ ase kɔ adwuma no bo a ɛkorɔn mu.
"Nneɛma Kakraa Kyerɛ Bere Nyinaa Adwuma no Ho Ka a Ɛba Fam".
Inverter a wɔkyɛ no betumi atew nnwinnade a wɔyɛ no mprenu so, nanso adwuma no ho ka nyinaa nso ka DC/DC nsakrae, ahobammɔ, controls, commissioning, ne daakye nsakrae ho ka ho. Mfiri dodow a ɛba fam mfiase no betumi ama adwumayɛ anaa ntrɛwmu anohyeto a emu yɛ den aba akyiri yi.
"AC Coupling Yɛ Ma Owia Nnwuma a Ɛwɔ Hɔ Dedaw Nkutoo".
AC coupling abu so wɔ retrofits mu, nanso ebetumi nso asom nnwuma foforo a ɛhwehwɛ sɛ wɔde grid charge a ɛyɛ mmerɛw, independent dispatch, anaa modular expansion. Project stage yɛ adeɛ baako wɔ pii mu-ɛnyɛ architecture no nko ara na ɛkyerɛ.
Ntotoho no kyerɛ sɛ ɛnsɛ sɛ wɔpaw adansi abien no mu biara fi mfaso biako mu.
AC coupling taa ma ahofadi ne modularity pii. DC coupling betumi ama PV-to-battery kwan no ayɛ tiaa na ɛde ahoɔden a wɔatwitwa anaasɛ nkitahodi tumi a wɔkyɛ no adi dwuma yiye.
Paw a ɛfata fi adwuma no mfonini a edi mũ no mu: mfiase, ahoɔden kwan, adwumayɛ ahwehwɛde, grid nkitahodi, ne ntrɛwmu nhyehyɛe. Ɛsɛ sɛ wɔbom hwehwɛ nneɛma anum yi mu ansa na wɔawie adansi no.
Woreyɛ nhyehyɛe ayɛ Owia + Storage Project?
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