HVDC converter chaw nres tsheb

Substation, qhov chaw uas qhov voltage hloov.Txhawm rau xa cov hluav taws xob hluav taws xob uas tsim los ntawm lub tshuab fais fab mus rau qhov chaw deb, qhov voltage yuav tsum

yuav tsum tau nce thiab hloov mus rau hauv high voltage, thiab ces qhov voltage yuav tsum tau txo raws li qhov yuav tsum tau nyob ze ntawm tus neeg siv.Qhov kev ua haujlwm ntawm voltage nce thiab poob yog

ua tiav los ntawm substation.Cov khoom tseem ceeb ntawm lub substation yog hloov thiab transformer.

Raws li qhov ntsuas, cov me me hu ua substations.Lub substation loj dua lub substation.

Substation: feem ntau step-down substation nrog voltage theem qis dua 110KV;Substation: suav nrog "step-up thiab step-down" substations ntawm

ntau theem voltage.

Substation yog lub chaw tsim hluav taws xob hauv lub zog hluav taws xob uas hloov hluav taws xob, txais thiab faib hluav taws xob, tswj cov kev taw qhia ntawm lub zog.

ntws thiab kho qhov voltage.Nws txuas cov kab hluav taws xob ntawm txhua theem ntawm qhov hluav taws xob los ntawm nws cov transformer.

Lub substation yog kev hloov pauv ntawm AC voltage theem (high voltage - low voltage; low voltage - high voltage);Lub converter chaw nres tsheb yog lub

Kev hloov pauv ntawm AC thiab DC (AC rau DC; DC rau AC).

Qhov chaw nres tsheb rectifier thiab inverter chaw nres tsheb ntawm HVDC kis tau tus mob hu ua converter chaw nres tsheb;Lub chaw nres tsheb rectifier hloov AC zog rau DC lub zog

tso zis, thiab qhov chaw nres tsheb inverter converts DC fais fab rov qab mus rau AC zog.Rov qab-rau-rov qab converter chaw nres tsheb yog muab cov chaw nres tsheb rectifier thiab inverter

chaw nres tsheb ntawm HVDC kis mus rau hauv ib qho chaw nres tsheb converter, thiab ua tiav cov txheej txheem ntawm kev hloov AC rau DC thiab tom qab ntawd DC rau AC ntawm tib qhov chaw.

Qhov zoo ntawm converter chaw nres tsheb

1. Thaum xa cov hluav taws xob tib yam, cov kab nqi qis: AC overhead transmission kab feem ntau siv 3 conductors, thaum DC tsuas yog xav tau 1 (ib tug ncej) lossis 2.

(ob tug ncej) conductors.Yog li, DC kis tau tus mob tuaj yeem txuag tau ntau cov ntaub ntawv sib kis, tab sis kuj txo cov nqi thauj mus los thiab kev teeb tsa ntau.

2. Tsis tshua muaj hluav taws xob poob ntawm txoj kab: vim tias tsuas yog ib lossis ob lub conductors siv nyob rau hauv DC overhead kab, lub zog poob qis me me thiab muaj "qhov chaw them nqi"

nyhuv.Nws qhov kev poob qis thiab xov tooj cua cuam tshuam tsawg dua li ntawm AC nyiaj siv ua haujlwm.

3. Haum rau kev sib kis hauv qab dej: nyob rau hauv tib yam kev mob ntawm cov hlau tsis muaj hlau thiab cov ntaub ntawv insulating, qhov tso cai ua haujlwm voltage hauv DC yog

kwv yees li 3 npaug siab dua li hauv qab AC.Lub zog xa tawm los ntawm DC cable kab nrog 2 cores yog ntau dua qhov uas kis tau los ntawm AC cable kab nrog 3

cores.Thaum lub sijhawm ua haujlwm, tsis muaj qhov sib nqus induction poob.Thaum nws siv rau DC, nws tsuas yog qhov tsis kam ntawm cov tub ntxhais hlau, thiab kev laus ntawm rwb thaiv tsev.

kuj qeeb qeeb, thiab kev pabcuam lub neej yog sib txuas ntev dua.

4. System stability: Nyob rau hauv lub AC kis tau tus mob system, tag nrho cov synchronous generators txuas nrog lub hwj chim system yuav tsum tswj synchronous ua hauj lwm.Yog DC kab

yog siv los txuas ob lub tshuab AC, vim tias DC kab tsis muaj reactance, qhov teeb meem ruaj khov saum toj no tsis muaj nyob, uas yog, DC kis tau tus mob tsis txwv los ntawm

qhov kis tau tus mob nrug.

5. Nws tuaj yeem txwv qhov luv luv Circuit Court tam sim no ntawm lub cev: thaum txuas ob lub tshuab AC nrog AC kis kab, qhov luv luv Circuit Court tam sim no yuav nce vim qhov

nce lub peev xwm ntawm lub cev, uas tuaj yeem tshaj qhov muaj peev xwm nrawm ntawm qhov qub Circuit Court breaker, uas yuav tsum tau hloov ntau yam khoom siv thiab

nce kev nqis peev ntau.Cov teeb meem saum toj no tsis muaj nyob hauv DC kis tau tus mob.

6. Kev tswj ceev ceev thiab kev lag luam txhim khu kev qha: DC kis tau tus mob tau yooj yim thiab sai kho lub zog nquag thiab paub txog lub zog ntws rov qab los ntawm thyristor converter.

Yog tias siv txoj kab bipolar, thaum ib tus ncej tsis ua haujlwm, lwm tus ncej tseem tuaj yeem siv lub ntiaj teb lossis dej raws li lub voj voog txuas ntxiv xa mus rau ib nrab ntawm lub zog, uas kuj tseem txhim kho.

kev ntseeg tau ntawm kev ua haujlwm.

Rov qab-rau-rov qab converter chaw nres tsheb

Rov qab-rau-rov qab converter chaw nres tsheb muaj cov yam ntxwv tseem ceeb tshaj plaws ntawm cov pa HVDC kis tau tus mob, thiab tuaj yeem paub txog kev sib txuas asynchronous.Piv nrog

Cov pa DC kis tau tus mob, qhov zoo ntawm rov qab-rau-rov qab converter chaw nres tsheb yog qhov tseem ceeb:

1. Tsis muaj DC kab thiab DC sab poob yog me me;

2. Tsawg voltage thiab siab tam sim no kev ua haujlwm hom tuaj yeem xaiv ntawm DC sab kom txo qhov rwb thaiv tsev ntawm cov hloov pauv hloov pauv, hloov lub valve thiab lwm yam cuam tshuam.

khoom siv thiab txo tus nqi;

3. Lub DC sab harmonics tuaj yeem tswj tau tag nrho hauv lub valve nrog tsis muaj kev cuam tshuam rau cov khoom siv sib txuas lus;

4. Lub converter chaw nres tsheb tsis xav tau grounding electrode, DC lim, DC ntes, DC hloov teb, DC cab kuj thiab lwm yam khoom siv DC, yog li txuag peev.

piv nrog cov pa high-voltage DC kis tau tus mob.