Vim li cas NGRS siv nyob rau hauv transformers?

Lub hom phiaj tseem ceeb ntawm kev siv nruab nrab av resistor (NGR) hauv kev tiv thaiv yog los muab kev tiv thaiv kev txwv ntawm cov khoom lag luam ib txwm muaj, chaw nyob ncaj qha, chaw nyob lossis arc tshem tawm. Nov yog saib vim li cas:
1.Txoj kev ua txhaum hauv av hauv av tam sim no thiab kev nyab xeeb khoom siv kev nyab xeeb.
Cov shortcomings ntawm selling ncaj qha:
Yog tias tus hloov pauv nruab nrab yog av ncaj qha, lub}}}}}}}}} circuit compering winding, hlau cores lossis nruab nrab insulators lossis nruab nrab insulators, lossis txawm ua hluav taws. Nyob rau hauv lub ncaj qha hauv 10kv system, piv txwv li, qhov kev txhaum tam sim no tuaj yeem ncav cuag ntau txhiab tus amperes, deb tshaj li lub cuab yeej tuaj yeem tiv taus.
Cov nomhru:
Los ntawm kev ntxig cov khoom siv ntawm nruab nrab ntawm nruab nrab ntawm nruab nrab ntawm nruab nrab thiab hauv av, qhov kev txhaum tam sim no tsuas yog txwv (piv txwv li kaum mus rau pua pua mus rau pua pua ntawm cov amperes). Piv txwv li:
Rau qhov 10kv system, lub algr resorector feem ntau yog nyob rau hauv lub kaum tawm ntawm deszens ntawm offs, txwv tsis pub muaj nuj nqis tam sim no (piv txwv li ntawm OHMS tam sim no rau qib qis (piv txwv li, 50-100as).
2.overvoltical supression, overvoltage rwb thaiv tsev thiab kev tiv thaiv kab ke
Overvoltage txaus ntshai ntawm cov ungrounds:
Thaum nruab nrab lub ntsiab lus yog underded, ib qho - pegase av muaj peev xwm nce mus rau cov kab voltage), yog li ua rau rwb thaiv tsev kom tawg. Ib qho ntxiv, kev ua txhaum arc tuaj yeem rov tua tau tua thiab rov}}}}}}}}}} {}}}} {} lub sij hawm {6} {} lub sij hawm {
Cov kev txwv arc supression coil gilding:
Arc Fissipation Loop them hluav taws xob muaj peev xwm tam sim no thiab tua cov arc los ntawm inductive tam sim no. Txawm li cas los xij, lawv tsis tuaj yeem txwv cov kev ua kom dav dav thiab tej zaum yuav ua rau muaj kev cuam tshuam furroresonance overVoltes.
NGR ADPression Cov teebmeem:
Cov kev tso tawm them tawm ntawm: Tom qab ua txhaum Arc extinguished, Damping resonance: tsis kam raws li damping keeb, ntawm qhov xwm txheej ntawm overvoltage yog txwv rau 2.5 zaug ntawm qhov hluav taws xob, lub sijhawm ua haujlwm ntev ntawm cov khoom siv.
3. Kev ncua ntxiv ntawm kev siv fais fab txuas ntxiv thiab txo qis hauv qhov chaw ntawm lub zog hluav taws xob
Shortcuts rau muaj zog:
In solid-state grounding systems, single-phase grounding fault will immediately trigger the protection device tripping, causing a large area of ​​power outages.
Ngr uas zoo:
NGR tso cai rau lub kaw lus ua haujlwm luv (hais 1 -} 2 teev) nyob rau hauv qhov kev tshwm sim ntawm ib-theem av yuam kev, uas yuav lub sijhawm txij nkawm. Piv txwv li:
Nroog Spromotion network: kev qhia ntawm NGR hauv 10KV Cable Network
Cov neeg siv cov tsiaj txhu: petrochemicals, mines thiab lwm yam kev lag luam yuav tsum muaj kev nyob ntawm lub zog hluav taws xob ntxiv. NGR tuaj yeem tiv thaiv hluav taws xob tiv thaiv hluav taws los yog qhov tawg lossis tawg, thiab tuaj yeem tiv thaiv cov hluav taws xob thoob plaws cov nroj tsuag.
4. Ntsib Cov Kev Tiv Thaiv Relay Kev Tiv Thaiv
Cov Khoom Tiv Thaiv Kev Ua Haujlwm:
Relay tiv thaiv cov khoom yuav tsum kuaj pom cov av los txheeb xyuas thiab tshem tawm cov txhaum. Yog tias qhov tam sim no tsawg dhau (piv txwv li, tsis muaj kev tiv thaiv tsis tuaj yeem ua haujlwm, thiab yog tias lub siab dhau (piv txwv li kev tiv thaiv ncaj ncees yuav swb.
NGR's Ntsuas Kev Ua Haujlwm:
Los ntawm kho tus nqi tiv thaiv, qhov kev txhaum tam sim no yog tswj tau nyob rau hauv Relay tiv thaiv ntaus ntawv ntau (piv txwv, 10-100a) kom ntseeg tau nrawm thiab muaj tseeb. Piv txwv li:
Pes tsawg -} ntu kev tiv thaiv tam sim no:
Kev tiv thaiv zoo: NGR tsis cuam tshuam rau kev ua haujlwm ib txwm muaj kev tiv thaiv kev tiv thaiv sib txawv ntawm kev hloov sab hauv.
Haum rau sib txawv capreatorance cov kev xav tau.
Qhov cuam tshuam ntawm kev muaj peev xwm tam sim no:
Lub kaw lus muaj peev xwm tam sim no (IC) nce nrog lub voj voog cable. Thaum IC tau tshaj li ib qho nqi (piv txwv li ntau dua 30kv system), ARC nyuaj rau kev tua yeeb yaj kiab thiab yuav tsum tau ua nom kom txwv qhov tam sim no.
NPGR qhov yooj:
Tus nqi tsis kam yuav tuaj yeem hloov kho raws li lub peev xwm tam sim no ntawm lub system kom tau raws li cov kev xav tau ntawm cov xwm txheej sib txawv. Piv txwv li:
Tsawg lub peev xwm Tam sim no system: Xaiv qhov txiaj ntsig qis tshaj plaws kom ua tiav ob qho tib si kev txwv thiab overvoltage supression. Siab - capch capitalance tam sim no cov kab ke: Xaiv cov siab tsis kam, overheating tshwm sim los ntawm txeej.
6. Ua raws li cov qauv thoob ntiaj teb thiab cov kev cai nyab xeeb
Cov Qauv Yuav Tsum Tau:
Ieee, iec thiab lwm cov qauv txhais cov qauv tsim qauv, xeem ntawv thiab kev teeb tsa ua kom raug cai rau cov nom.
Qhov ntsuas kub: Lub resistor yuav tsum muaj peev xwm tiv taus cov cua sov tsim los ntawm kev txhaum qe (piv txwv li, 760℃rau 10 vib nas this).
Cov ntawv pov thawj kev nyab xeeb:
NR cov khoom yuav tsum muaj ntawv lees paub los ntawm CSA, ul thiab cov koom haum kom ntseeg tau tias kev ntseeg tau hauv kev ua haujlwm dhau.
7. Cov ntaub ntawv thov cov ntaub ntawv pov thawj pov thawj
Kev Tshawb Fawb Hluav Taws Xob Cov Ntaub Ntawv:
Ib qho 50MW Generator teeb tsa siv NGR ntawm cov ntsiab lus nruab nrab, lim cov khoom txhaum tawm mus rau 5-25A, tiv thaiv windings los ntawm rwb thaiv tsev thiab tiv thaiv cov tub ntxhais tseem ceeb.
Cov Ntaub Ntawv Kev Tshawb Fawb Hauv Nroog SpeAms Network:
Ib qho kev siv hluav taws xob network siv cov neeg siv hluav taws xob los ntawm 60% thiab cov neeg muaj feem cuam tshuam txog kev ntseeg tau.