HVDC converter station

Substation, malo omwe magetsi amasinthidwa.Pofuna kutumiza mphamvu yamagetsi yopangidwa ndi magetsi kumalo akutali, voteji iyenera

ziwonjezeke ndi kusinthidwa kukhala voteji mkulu, ndiyeno voteji ayenera kuchepetsedwa monga pakufunika pafupi wosuta.Ntchito iyi ya kukwera ndi kugwa kwamagetsi ndi

kumalizidwa ndi substation.Zida zazikulu za substation ndi switch ndi transformer.

Malingana ndi sikelo, zing'onozing'ono zimatchedwa substations.Sitima yapang'ono ndi yayikulu kuposa poyikapo.

Sitima yapang'ono: Kagawo kakang'ono kotsika komwe kumakhala ndi mulingo wamagetsi pansi pa 110KV;Malo ang'onoang'ono: kuphatikiza ma "pokwezera ndi kutsika" malo a

osiyanasiyana ma voltage.

Substation ndi malo opangira mphamvu mumagetsi omwe amasintha ma voliyumu, kulandira ndikugawa mphamvu yamagetsi, kuwongolera komwe mphamvu yamagetsi imayendera.

kuyenda ndi kusintha ma voltage.Imagwirizanitsa gridi yamagetsi pamagulu onse amagetsi kudzera mu transformer yake.

The substation ndondomeko kutembenuka kwa AC voteji mlingo (high voteji - otsika voteji; otsika voteji - mkulu voteji);Malo osinthira ndi

kutembenuka pakati pa AC ndi DC (AC kupita ku DC; DC kukhala AC).

Malo obwezeretsanso ndi inverter station ya HVDC transmission amatchedwa ma converter station;Malo okonzanso amasintha mphamvu ya AC kukhala mphamvu ya DC

zotulutsa, ndipo inverter station imatembenuza mphamvu ya DC kukhala mphamvu ya AC.Back-to-back converter station ndikuphatikiza malo osinthira ndi inverter

malo otumizira ma HVDC kukhala siteshoni imodzi yosinthira, ndikumaliza ntchito yosinthira AC kukhala DC kenako DC kukhala AC pamalo omwewo.

Ubwino wa converter station

1. Potumiza mphamvu yomweyo, mtengo wa mzere ndi wotsika: Mizere yotumizira pamwamba pa AC nthawi zambiri imagwiritsa ntchito ma conductor a 3, pomwe DC imangofunika 1 (pole imodzi) kapena 2.

(double pole) kondakitala.Chifukwa chake, kufalitsa kwa DC kumatha kupulumutsa zida zambiri zotumizira, komanso kuchepetsa ndalama zambiri zoyendera ndi kukhazikitsa.

2. Kuchepa kwamphamvu kwamphamvu kwa mzere: chifukwa kondakitala imodzi yokha kapena awiri amagwiritsidwa ntchito pamzere wapamwamba wa DC, kutayika kwamphamvu kwamphamvu kumakhala kochepa ndipo kumakhala ndi "charge charge"

zotsatira.Kutayika kwake kwa corona ndi kusokoneza kwa wailesi ndizocheperako kuposa za mzere wapamutu wa AC.

3. Yoyenera kufalitsa m'madzi: pansi pazikhalidwe zomwezo zazitsulo zopanda chitsulo ndi zipangizo zotetezera, mphamvu yovomerezeka yogwira ntchito pansi pa DC ndi

pafupifupi nthawi za 3 kuposa zomwe zili pansi pa AC.Mphamvu yotumizidwa ndi chingwe cha DC chokhala ndi 2 cores ndi yayikulu kwambiri kuposa yomwe imaperekedwa ndi chingwe cha AC ndi 3.

mitima.Panthawi yogwira ntchito, palibe kuwonongeka kwa maginito.Ikagwiritsidwa ntchito ku DC, imangokhala kutayika kwa waya wapakati, komanso kukalamba kwa kutchinjiriza.

imachedwanso, ndipo moyo wautumiki ndi wautali.

4. Kukhazikika kwadongosolo: Mu njira yotumizira AC, majenereta onse osakanikirana omwe amagwirizanitsidwa ndi mphamvu zamagetsi ayenera kusunga ntchito yofanana.Ngati mzere wa DC

imagwiritsidwa ntchito kulumikiza machitidwe awiri a AC, chifukwa mzere wa DC ulibe chochita, vuto lokhazikika lomwe lili pamwambali lilibe, ndiye kuti, kufalitsa kwa DC sikuli malire ndi

mtunda wotumizira.

5. Ikhoza kuchepetsa nthawi yachidule ya dongosolo: pogwirizanitsa machitidwe awiri a AC ndi ma AC transmission mizere, chigawo chachifupi chidzawonjezeka chifukwa cha

kuwonjezeka kwa mphamvu yamakina, yomwe imatha kupitilira mphamvu yothamanga mwachangu ya chowotcha choyambira, chomwe chimafuna kusintha zida zambiri ndi

kuonjezera ndalama zambiri.Mavuto omwe ali pamwambawa sapezeka pakutumiza kwa DC.

6. Kuthamanga kwachangu komanso ntchito yodalirika: Kutumiza kwa DC kumatha kusintha mosavuta komanso mwachangu mphamvu yogwira ndikuzindikira kusinthika kwamagetsi kudzera pa chosinthira cha thyristor.

Ngati mzere wa bipolar utengedwa, pamene mtengo umodzi ukulephera, mtengo winawo ukhoza kugwiritsabe ntchito nthaka kapena madzi monga dera kuti apitirize kufalitsa theka la mphamvu, zomwe zimapanganso bwino.

kudalirika kwa ntchito.

Malo osinthira obwerera m'mbuyo

Malo osinthira obwerera kumbuyo ali ndi zinthu zofunika kwambiri pakupatsira wamba kwa HVDC, ndipo amatha kuzindikira kulumikizana kwa gridi kosasunthika.Poyerekeza ndi

Kutumiza kwanthawi zonse kwa DC, zabwino zosinthira kumbuyo ndi kumbuyo ndizodziwika kwambiri:

1. Palibe mzere wa DC ndipo kutayika kwa mbali ya DC ndikochepa;

2. Low voteji ndi mkulu panopa ntchito mode akhoza kusankhidwa pa DC mbali kuchepetsa kutchinjiriza mlingo wa converter thiransifoma, valavu chosinthira ndi zina zogwirizana.

zipangizo ndi kuchepetsa mtengo;

3. Ma harmonics a mbali ya DC amatha kulamulidwa kwathunthu mu holo ya valve popanda kusokoneza zipangizo zoyankhulirana;

4. Malo osinthira safuna ma elekitirodi oyambira, fyuluta ya DC, chomangira cha DC, gawo losinthira la DC, chonyamulira cha DC ndi zida zina za DC, motero kupulumutsa ndalama.

poyerekeza ndi ma transmission wamba a high-voltage DC.