Majenereta a Turbine a Mphepo ndi Momwe Amagwirira Ntchito Popanga Mphamvu
Mphamvu ya mphepo ndi imodzi mwa magwero amphamvu obwezerezedwanso omwe apangidwa kwambiri m'maiko osiyanasiyana chifukwa ndi yochuluka, yoyera, ndipo ingagwiritsidwe ntchito pamlingo waung'ono ndi waukulu. Kumbuyo kwa masamba ozungulira ooneka ngati osavuta a turbine ya mphepo kuli dongosolo lovuta lamagetsi, lomwe chimodzi mwa zigawo zake zofunika kwambiri ndi jenereta. Jenereta ya turbine ya mphepo imasintha mphamvu yamakina kuchokera ku kuzungulira kwa rotor kukhala mphamvu yamagetsi yomwe ingagwiritsidwe ntchito ndi mabanja, mafakitale, komanso kugawidwa ku gridi yamagetsi. Nkhaniyi ikufotokoza za jenereta ya turbine ya mphepo, mitundu yake, ndi momwe imagwirira ntchito popanga magetsi.
1. Udindo wa Majenereta mu Ma Turbine a Mphepo
Ma turbine a mphepo amagwira ntchito motsatira mfundo ya kusintha pang'onopang'ono mphamvu:
1. Mphamvu ya mphepo imakankhira masamba kuti rotor izungulire.
2. Kuzungulira kwa rotor kumatumizidwa ku shaft ndi system yotumizira (kungakhale ndi kapena popanda gearbox).
3. Jenereta imasintha mphamvu ya makina ya kuzungulira kwa shaft kukhala mphamvu yamagetsi pogwiritsa ntchito mfundo ya kulowetsa mphamvu yamagetsi.
4. Magetsi opangidwa amakonzedwa ndi makina amagetsi kuti agwirizane ndi miyezo yamagetsi ndi ma frequency, asanagwiritsidwe ntchito kapena kugawidwa ku gridi.
Popanda jenereta, turbine ya mphepo ingakhale chipangizo chozungulira. Jenereta ndiye mlatho waukulu womwe umasintha mphamvu ya mphepo kukhala magetsi ogwiritsidwa ntchito.
2. Mfundo Yoyambira Yogwirira Ntchito Jenereta: Kuyambitsa Magetsi
Majenereta a mphepo amagwira ntchito motsatira lamulo la Faraday la Electromagnetic Induction. Kwenikweni, magetsi amapangidwa pamene mphamvu ya maginito mu coil ikusintha. Kawirikawiri, jenereta imakhala ndi magawo awiri akuluakulu:
– Chozungulira: gawo lozungulira, nthawi zambiri limakhala ndi maginito okhazikika kapena kuzungulira kwa munda.
– Stator: gawo losasuntha, lomwe lili ndi ma coil komwe magetsi oyambitsa amapangidwa.
Pamene rotor ikuzungulira, mphamvu yake ya maginito "imadula" ma stator coils, ndikupanga alternating current (AC). AC current iyi imayendetsedwa ndikusinthidwa musanagwiritse ntchito.
3. Zigawo za Machitidwe Zomwe Zimathandizira Majenereta a Mphepo
Kuti jenereta igwire bwino ntchito mu turbine ya mphepo, pali zinthu zingapo zothandizira:
1. Tsamba lozungulira ndi hub: gwiritsani mphamvu ya mphepo.
2. Mzere waukulu (mzere waukulu): umatumiza kuzungulira kwa rotor.
3. Gearbox (pa mitundu ina): imawonjezera kuzungulira kwa rotor kuchoka pa yochedwa kupita pa yothamanga kwambiri kuti igwirizane ndi zosowa za jenereta.
4. Jenereta: imasintha kuzungulira kukhala magetsi.
5. Chosinthira/Chosinthira: chimasintha makhalidwe amagetsi (voltage/frequency) kuti chikhale chokhazikika komanso mogwirizana ndi gridi.
6. Transformer: imawonjezera mphamvu yamagetsi kuti ifalitsidwe bwino.
7. Dongosolo lowongolera: limawongolera njira ya turbine (yaw), ngodya ya tsamba, liwiro lozungulira, ndi chitetezo.
Ndikofunikira kudziwa kuti mphamvu zamagetsi zamagetsi zamagetsi zimasinthasintha chifukwa cha kusintha kwa liwiro la mphepo. Chifukwa chake, zamagetsi zamagetsi ndi makina owongolera ndizofunikira kwambiri pakupanga mphamvu zokhazikika.
4. Mitundu ya Majenereta mu Ma Turbine a Mphepo
Pali mitundu ingapo ya majenereta omwe amagwiritsidwa ntchito kwambiri m'mafakitale opanga mphamvu za mphepo. Kusankha mtundu wa jenereta kumakhudzidwa ndi kukula kwa turbine, zofunikira pakugwira ntchito bwino, mtengo wake, ndi zovuta zosamalira.
a) Jenereta Yoyambitsa (Jenereta Yosasinthasintha)
Majenereta oyambitsa magetsi amagwiritsidwa ntchito kwambiri poika ma turbine amphepo m'mibadwo yoyambirira komanso m'malingaliro ena omwe amagogomezera kuphweka.
Zochulukira:
- Kapangidwe kosavuta komanso kolimba
- Kukonza kosavuta
- Mtengo wotsika
Kukonzekera:
- Imafuna mphamvu yogwira ntchito (nthawi zambiri kuchokera ku gridi kapena capacitor)
- Kuwongolera liwiro sikusinthasintha popanda machitidwe ena
- Kugwira ntchito bwino kungakhale kotsika pansi pa liwiro losinthasintha
Majenereta oyambitsa magetsi ndi oyenera machitidwe olumikizidwa ndi gridi yokhala ndi zowongolera zovuta, ngakhale kuti ukadaulo wamakono ukupitilirabe kupita ku mayankho osinthasintha a liwiro.
b) Jenereta Yopangira Zinthu Zowonjezera (DFIG) Yoperekedwa ndi Ma Fed Awiri (Double-Fed)
DFIG ndi mtundu wotchuka kwambiri wa jenereta yopangira mphamvu zamagetsi m'ma turbine akuluakulu amphepo chifukwa imalola kugwira ntchito mwachangu komanso chosinthira sichifunika kugwira mphamvu yonse 100%.
Mu DFIG, stator imalumikizidwa mwachindunji ku gridi, pomwe rotor imalumikizidwa ku chosinthira (kudzera mu mphete zotsetsereka). Chosinthira chimawongolera mphamvu ya rotor kuti chiwongolere mphamvu yotulutsa ndi ma frequency.
Zochulukira:
- Kugwira ntchito mosinthasintha kwa liwiro (kugwira bwino mphamvu ya mphepo)
- Kukula kwa chosinthira ndi kochepa kuposa makina onse osinthira.
- Kulamulira bwino mphamvu yogwira ntchito komanso yogwira ntchito
Kukonzekera:
- Kugwiritsa ntchito mphete zopindika (kukonza bwino)
- Zovuta kwambiri pankhani ya dongosolo
DFIG ikukhala chisankho chodziwika bwino chifukwa cha mgwirizano wake wabwino pakati pa mtengo ndi magwiridwe antchito.
c) Jenereta Yogwirizana (Jenereta Yogwirizana)
Majenereta ogwirizana amatha kugwiritsa ntchito majenereta okhazikika a maginito (PMSGs) kapena ma field coil. Ma PMSG amagwiritsidwa ntchito kwambiri m'mapangidwe amakono, makamaka pama turbine opanda ma gearbox (direct-drive).
Zochulukira:
- Kuchita bwino kwambiri, makamaka PMSG
- Imatha kugwira ntchito bwino pa liwiro lotsika
- Yoyenera kuyendetsa mwachindunji motero imachepetsa zida zamakaniko
Kukonzekera:
- Imafuna chosinthira mphamvu (nthawi zambiri chosinthira chathunthu)
- Maginito okhazikika amawonjezera mtengo ndipo amadalira zinthu.
- Makina owongolera ovuta kwambiri komanso zamagetsi zamagetsi
Ma turbine oyendetsedwa mwachindunji okhala ndi ma PMSG nthawi zambiri amakhala chete ndipo safuna kukonza ma gearbox ambiri, koma ndalama zoyambirira zimatha kukhala zokwera.
5. Momwe Jenereta ya Mphepo Imagwirira Ntchito Popanga Mphamvu (Gawo ndi Gawo)
Kuti timvetse bwino, nayi njira yogwirira ntchito ya turbine ya mphepo kuchokera ku mphepo kupita ku magetsi:
1. Mphepo imatembenuza tsamba
Kapangidwe ka masamba a aerodynamic kamapangitsa kuti akwere, zomwe zimapangitsa kuti rotor izungulire. Dongosolo la pitch limasintha ngodya ya tsamba kuti likhale lotetezeka kwambiri.
2. Kuzungulira kumatumizidwa ku shaft
Rotor imayendetsa shaft yayikulu. Liwiro la kuzungulira kwa rotor nthawi zambiri limakhala lotsika (monga, 10–20 rpm mu ma turbine akuluakulu).
3. Gearbox imawonjezera rpm (ngati ilipo)
Ma turbine ambiri amagwiritsa ntchito bokosi la gearbox kuti awonjezere liwiro kufika pa mazana kapena zikwi za rpm kuti lifanane ndi jenereta yeniyeniyo. Mu ma turbine oyendetsedwa mwachindunji, sitepe iyi siigwiritsidwa ntchito.
4. Jenereta imasintha mphamvu ya makina kukhala magetsi a AC.
Chozungulira cha jenereta chimazungulira, ndikupanga kusintha kwa maginito mu stator, zomwe zimapangitsa kuti magetsi a AC asinthe.
5. Zamagetsi zamagetsi zimalimbitsa magetsi
Pamene liwiro la turbine likusintha, ma frequency ndi voltage ya jenereta zimasinthanso. Chosinthira/chosinthira magetsi chimasintha izi kukhala magetsi okhala ndi makhalidwe oyenera (monga 50 Hz kapena 60 Hz ndi voltage inayake).
6. Transformer imawonjezera mphamvu yamagetsi
Mphamvu yamagetsi imawonjezeka kuti ichepetse kutayika kwa mphamvu panthawi yotumiza magetsi. Kenako magetsi amagawidwa ku gridi kapena kugwiritsidwa ntchito m'deralo.
7. Kulamulira ndi kuteteza kumateteza ntchito
Mphepo ikakhala yamphamvu kwambiri, makinawa amachepetsa mphamvu (kuponya) kapena kuyimitsa turbine (kudula) chifukwa cha chitetezo. Makinawa amatetezanso ku kukwera kwa magetsi, kusalingana, ndi kusokonezeka kwa gridi.
6. Kugwira Ntchito Bwino ndi Zinthu Zomwe Zimakhudza Kugwira Ntchito kwa Jenereta
Kagwiridwe ka ntchito ka jenereta ya turbine ya mphepo kamakhudzidwa ndi zinthu zambiri, kuphatikizapo:
– Liwiro la mphepo: mphamvu ya mphepo imawonjezeka molingana ndi chigawo cha liwiro la mphepo, kotero kusintha pang'ono kumakhala ndi zotsatira zazikulu.
– Kapangidwe ka turbine (pitch, dayamita ya rotor): imatsimikiza kuchuluka kwa mphamvu ya mphepo yomwe ingagwidwe.
– Mtundu wa jenereta ndi kuwongolera: makina osinthasintha a liwiro okhala ndi ma converter amakono nthawi zambiri amakhala ogwira ntchito bwino m'mikhalidwe yosiyanasiyana ya mphepo.
– Kutayika kwa makina: mwachitsanzo mu bokosi la gearbox, mabearing ndi clutch.
- Kutayika kwa magetsi: kutayika kwa mkuwa mu coil, kutayika kwa maginito pakati, ndi kutayika mu chosinthira.
– Kutentha ndi ubwino wa chisamaliro: kutentha kwambiri kumachepetsa kugwira ntchito bwino ndipo kumathandizira kuwonongeka kwa zigawo.
M'malo mwake, si mphamvu zonse za mphepo zomwe zingasinthidwe kukhala magetsi. Pali malire a chiphunzitso otchedwa Betz Limit, omwe amanena kuti mphamvu ya mphepo yokwana pafupifupi 59,3% imatha kugwidwa ndi rotor. Yotsalayo imatayika ngati turbulence ndi airflow, zomwe ziyenera kukhalabe zikuyenda kudutsa turbine.
7. Mapeto
Jenereta ya turbine ya mphepo ndi gawo lofunika kwambiri lomwe limasintha kusintha kwa makina kukhala mphamvu zamagetsi kudzera mu induction yamagetsi. Mitundu yosiyanasiyana ya majenereta—kuyambira induction mpaka DFIG mpaka maginito okhazikika—amasankhidwa kutengera mgwirizano pakati pa magwiridwe antchito, mtengo, kusavutikira kukonza, ndi zofunikira zowongolera. M'mafamu amakono amphepo, jenereta imagwira ntchito limodzi ndi gearbox (kapena direct drive), makina owongolera, ndi zamagetsi zamagetsi kuti ipange magetsi okhazikika ngakhale kuti mphepo ikusintha. Ndi kupita patsogolo kwa ukadaulo wazinthu, zamagetsi zamagetsi, ndi machitidwe owongolera, majenereta a turbine ya mphepo akupitilizabe kukhala ogwira ntchito bwino komanso odalirika, zomwe zimalimbitsa udindo wa mphamvu ya mphepo ngati yankho lofunikira ku tsogolo la mphamvu zoyera komanso zokhazikika.
Ngati mukufuna, nditha kusintha nkhaniyi kuti igwirizane ndi kalembedwe ka pepala la kusukulu/koleji, kuwonjezera tchati, kapena kuwonjezera gawo lapadera pa ma turbine ang'onoang'ono (osagwiritsa ntchito gridi).
