Yuav teeb tsa lub thawv-hom hloov chaw li cas?

1. High-voltage sab kev teeb tsa ntawm lub thawv hloov chaw

(1) Lub thawv hloov hluav taws xob tau muab faib ua hom davhlau ya nyob twg thiab lub nplhaib network yam raws li hom xov hlau hluav taws xob sab ntawm lub siab ntawm sab. Tsis tas yuav xav txog cov kev txuas ntxiv yog lub npov davhlau ya nyob twg hloov: yog lub sab hluav taws xob loj muaj ib qho kev tawm tswv yim thiab ntau cov zis lossis ntau lub tswv yim thiab ib qho tawm (feem ntau yog ib qho kev tawm, ob qho kev tawm lossis peb cov zis, lossis ob qho kev tawm, ib qho lossis ob qhov tsim tawm ), ob qho tib si Nws tuaj yeem raug suav hais tias yog kev hloov lub nplhaib network lub thawv hloov.

(2) Qhov high-voltage sab ntawm European lub thawv txiav muaj Circuit Court breaker teeb tsa. Tseem muaj thauj khoom hloov-fuse kev tiv thaiv kev tiv thaiv. Xav txog tus nqi ntawm lub thawv hloov pauv, thaum lub peev xwm ntawm lub thawv transformer tsis pub tshaj 800 kV · A thiab lub siab-voltage sab tiv thaiv kev teeb tsa yuav tsum tsis loj, tom kawg siv feem ntau.

(3) Feem ntau ntawm cov hloov hluav taws xob loj thauj khoom hauv lub thawv hloov pauv European yog FLN-12 hom leej faj pauv hexafluoride load hloov.

(4) Qhov ntsuas tam sim no ntawm kev tiv thaiv high-voltage fuse melt yog xaiv los ntawm cov qauv hauv qab no:

Irr=KIgmax

Qhov twg Irr —— qhov tam sim no cov roj yaj, A;

K-coefficient, feem ntau 1.3:

Igmax —— Qhov ntsuas tam sim no ntawm qhov high voltage sab ntawm lub transformer.

(5) Xav txog kev nyab xeeb ntawm kev khiav haujlwm thiab kev saib xyuas, lub siab-sab kev teeb tsa ntawm European hom lub thawv hloov pauv yuav tsum ua tau raws li cov cai nram qab no.

Muaj cov khoom tiv thaiv tso tawm thaum lub ntsaws hloov mus rau hauv lub xeev tawm kom paub tseeb tias qhov kev nyab xeeb ntawm kev txij nkawm.

Load Cov hloov thauj khoom thiab lub ntsuas hluav taws xob sib cais yog sib cais ua kom tau txais kev ua haujlwm zoo.

(6) Asmeskas lub thawv hloov maj mam sib sau nyob rau hauv tib lub roj-hauv qab lub thawv vim tias lub siab siv hluav taws xob hloov pauv-fuse ua ke hluav taws xob lub tshuab hluav taws xob thiab lub tshuab hluav taws xob tau muab sib xyaw ua ke, suav nrog txoj haujlwm hloov mus ua haujlwm, thaub qab fuse, ntsaws-fuse thiab hloov pauv. Lub nplhaib lub ntsej muag hom yog paub los ntawm kev hloov sab hauv kev sib txuas kawg ntawm lub ntsaws hloov.

2. Kev teeb tsa ntawm lub zog qis-hluav taws xob tseem ceeb faib cov txee ntawm lub thawv hloov chaw

Lub tshuab hluav taws xob tsawg hluav taws xob faib tawm ntawm lub thawv hloov chaw feem ntau yuav tsum tau nruab nrog cov khoom hluav taws xob qis hluav taws xob, hluav taws xob hluav taws xob tsawg ntawm lub tshuab hluav taws xob thiab cov hluav taws xob loj ntawm lub tshuab hluav taws xob. Lub teeb hluav taws xob tsawg-rho tawm hluav taws xob yog kom ua tiav cov kev xav tau ntawm kev tu txhua hnub thiab yuav tsum tau nruab. Lub tshuab hluav taws xob qis hluav taws xob hluav taws xob tsawg yog xaiv tau raws li lub zog transformer thiab qhov luv-Circuit Court tam sim no ntawm qhov chaw teeb tsa ntawm lub Circuit Court breaker.

Transformer low-voltage lub ntsiab hluav taws xob hluav taws xob hluav taws xob feem ntau siv cov ncej hom ntse Circuit Court breakers, thiab lawv cov kev xaiv thiab kev teeb tsa muaj raws li hauv qab no.

(1) Qhov ntsuas tam sim no ntawm Circuit Court breaker. Feem ntau, 2.0 txog 2.5 npaug ntawm qhov hloov pauv muaj peev xwm tus nqi txaus. Lub suab sib txuas tam sim no muaj ntau dua qhov luv luv-luv tam sim no tus nqi ntawm lub tshuab hluav taws xob tsawg ntawm qhov hloov pauv, thiab ntsuas qhov tsis tshua muaj xav tau.

(2) Lub sijhawm ntev (uas yog, rov qab tsis pub dhau lub sijhawm, ua haujlwm dhau) overcurrent tso tawm qhov teeb tsa tam sim no Lset, nws yog qhov yuav tsum tau ua raws li In≤Iset1≤Iz. Ntawm lawv, Hauv yog qhov tam sim no ntawm qhov qis-voltage sab ntawm lub hloov pauv, thiab Iz yog qhov tam sim no nqa lub peev xwm ntawm lub tsheb npav hluav taws xob tsawg. Txhawm rau kom siv tag nrho ntawm lub peev xwm hloov pauv yam tsis muaj kev cuam tshuam nws lub neej kev pab, Iset1 yuav tsum sib npaug zos los yog ze rau Hauv.

(3) Lub sijhawm luv luv (piv txwv li lub sijhawm, dhau sijhawm tamsis no) dhau ntawm tamsis no thiab tshaj tam sim no Iset2, nws yuav tsum ua kom tau raws 1.2Ifj≤Iset2≤Id / 1.3. Ntawm lawv, Ifj yog luv-lub sij hawm load ncov tam sim no ntawm kev hloov pauv, thiab Id yog tib-theem hauv av txhaum tam sim no ntawm kev hloov pauv. Qhov no xav tau yooj yim kom tau raws li rau cov hloov pauv txuas nrog D thiab yn11, tab sis nws tsis yooj yim kom tau raws li cov hloov pauv txuas nrog Y thiab yn0. Qhov no yog vim li cas vim li cas D thiab yn11 transformers feem ntau siv rau hauv lub thawv transformers. Lub sijhawm teeb tsa ntawm qhov luv-ncua sij hawm tshaj tawm ntawm qhov hloov hluav taws xob qis hluav taws xob hluav taws xob hluav taws xob hluav taws xob feem ntau yog 0.6 s, uas tuaj yeem xyuas kom lub sijhawm sib txawv nrog cov txuas hluav taws xob txuas mus ntxiv tsis yog tsawg dua 0.2 s.

(4) Qhov kev tshwm sim tshaj tawm tam sim ntawd teem Iset3 tam sim no. Vim tias qhov kev ncua luv luv dhau kev tiv thaiv kev tiv thaiv, txhawm rau kom muaj kev xaiv zoo dua, tus nqi ntawm Iset3 tuaj yeem tsim kho loj dua, feem ntau Iset1, uas yog 12-15 zaug tus nqi.

3. Lub zog tsis siv lub tshuab hluav taws xob tiv thaiv ntawm lub thawv hloov chaw

Raws li lub teb chaws tus qauv tam sim no, lub zog hluav taws xob reactive muaj peev xwm feem ntau yuav tsum tau teeb tsa raws li 30% ntawm qhov hloov pauv muaj peev xwm, uas yog qhov tseeb ua tau raws li qhov yuav tsum tau ua nyob rau hauv cov xwm txheej ntawm high natural power factor. Txawm li cas los xij, nrog kev tshaj tawm sai sai ntawm cov khoom siv hauv tsev xws li cov cua txias, tshuab ntxhua khaub ncaws, tub yees, lub teeb txuag hluav taws xob, thiab lwm yam, kev teeb tsa 30% ntawm kev hloov pauv muaj peev xwm qee zaum ua tsis tiav cov txiaj ntsig. Nws yuav tsum tau teeb tsa raws li 40% txog 60% ntawm qhov hloov pauv muaj peev xwm, thiab 10 qhov kev tswj lub voj yog qhov them ncaj qha. Txawm hais tias tus nqi tau nce, tus nqi ntawm tag nrho lub thawv hloov yog qhov tsis lees paub, thiab cov txiaj ntsig nyiaj tau zoo.

4. Kev teeb tsa ntawm lub txee hluav taws xob tsawg-txee

Tus naj npawb ntawm cov loops ntawm cov hluav taws xob tsawg-hluav taws xob tso tawm ntawm lub thawv hloov chaw feem ntau raug txiav txim siab raws li kev thauj khoom ntawm nws thaj chaw muab khoom siv hluav taws xob thiab 1 mus rau 3 loops raug txwv kom zoo. Cov lus qhia tshwj xeeb thiab qauv ntawm Circuit Court breaker xaiv rau txhua lub voj yog txiav txim siab raws li nws sib haum xam load ntawm. Qhov xaiv thiab teeb tsa qhov yuav tsum tau ua ntawm cov hluav taws xob hluav taws xob tsawg ntawm cov khoom siv hluav taws xob ntawm txhua qhov chaw pub khoom noj yog qhov zoo ib yam li cov hluav taws xob hluav taws xob hluav taws xob. Tab sis lub premise yog kom paub cov xam load tam sim no ntawm txhua feeder. Nws tuaj yeem npaj tsim nyog.