Zvidzidzo zvakakosha:
●Impulse Muedzo weTransformer Tsanangudzo:Muedzo wekufemerwa wetransformer inotarisa kugona kwayo kumirisana ne-high-voltage impulses, kuve nechokwadi chekuti insulation yayo inogona kubata kamwe kamwe spikes muvoltage.
●Lightning Impulse Test:Muedzo uyu unoshandisa masikirwo emheni-kunge mavoltages kuongorora kuchinjika kweshanduko, kuona kusasimba kunogona kukonzera kutadza.
●Switching Impulse Test:Muedzo uyu unoteedzera voltage spikes kubva pakuchinja mashandiro munetiweki, izvo zvinogona zvakare kusimbisa transformer insulation.
●Impulse Generator:Jenareta inokonzeresa, yakavakirwa padunhu reMarx, inogadzira yakakwira-voltage impulses nekuchaja capacitor mukuwirirana uye nekuaburitsa munhevedzano.
●Kuedza Kuita:Maitiro ekuyedza anosanganisira kushandisa akajairwa mheni impulses uye kurekodha voltage uye ikozvino waveforms kuona chero kutadza kwekudzivirira.
Kuvhenekera chinhu chinowanzoitika mukutapurirana mitsaranokuda kwourefu hwavo. Iyi mheni inorova pamutsetseconductorinokonzera impulse voltage. Iyo terminal midziyo yemutsetse wekutapurirana sengesimba transformerwobva wasangana nemheni iyi impulse voltages. Zvekare panguva yese yerudzi rwese online switching operation musystem, pachave ne switching impulses inoitika mu network. Hukuru hwema switching impulses angangoita 3.5 times the system voltage.
Insulation yakakosha kune vashanduri, sezvo chero kushaya simba kunogona kukonzera kukundikana. Kuti utarise kushanda kwayo, vashanduri vanopinda bvunzo dzedielectric. Nekudaro, iyo frequency yemagetsi inomira bvunzo haina kukwana kuratidza simba re dielectric. Ndosaka bvunzo dzekufungidzira, kusanganisira mheni uye switching impulse bvunzo, dzichiitwa
Mheni Impulse
Mheni yemheni chinhu chakachena chechisikigo. Saka zvakanyanya kuoma kufanotaura chimiro chaicho chefungu chemhirizhonga yemheni. Kubva pane data rakaunganidzwa pamusoro pemheni yechisikigo, zvinogona kugumiswa kuti kukanganisa kwehurongwa nekuda kwemheni yechisikigo sitiroko, inogona kumiririrwa nematatu ekutanga mafungu maumbirwo.
●Full wave
●Chopped wave uye
●Pamberi pemasaisai
Kunyangwe iyo chaiyo mheni yekupusha nyonganiso ingave isina chaizvo aya matatu maumbirwo asi nekutsanangura aya masaisai munhu anogona kumisa kushoma kwesimba dielectric simba retransformer.
Kana mhirizhonga yemheni ikafamba nemutsetse wekutumira isati yasvikatransformer, chimiro chayo chesaisai chinogona kuva chizere chakazara. Kana flash-over ikaitika cheroinsulatormushure mepamusoro pemasaisai, inogona kuva masaisai akachekwa.
Kana mheni ichirova yakananga materminal terminals, iyo impulsevoltageinosimuka nekukurumidza kusvika yasununguka nekupenya pamusoro. Pakarepo yekupenya-pamusoro pemagetsi anongoerekana adonha uye anogona kuumba kumberi kwechimiro chewave.
Mhedzisiro yeawa waveforms pane iyo transformer insulation inogona kunge yakasiyana kubva kune imwe neimwe. Isu hatisi kuenda pano mune zvakadzama nhaurirano yemhando ipi ye impulse voltage waveforms inokonzera rudzii rwekutadza mu transformer. Asi chero chingave chimiro chemheni yekuvhiringidza voltage wave, ese anogona kukonzera kutadza kuvharidzira mu transformer. Sakakuvheneka impulse test ye transformerndeimwe yemhando yakakosha bvunzo yetransformer.
Kushandura Impulse
Kuburikidza nezvidzidzo uye nekutarisa zvinoburitsa kuti switching pamusoro pevoltige kana switching impulse inogona kunge iine nguva yekumberi yemazana akati wandei mamicroseconds uye iyi voltage inogona kudzima nguva nenguva. Iyo IEC - 600060 yakagamuchira yavo yekuchinja impulse bvunzo, refu wave ine nguva yekumberi 250 μs uye nguva kusvika hafu kukosha 2500 μs nekushivirira.
Chinangwa cheiyo impulse voltage bvunzo ndeyekuchengetedza iyo iyotransformerinsulation inomira nemheni overvoltage inogona kuitika musevhisi.
Iyo impulse jenareta dhizaini yakavakirwa paMarx dunhu. Iyo yakakosha yedunhu dhayagiramu inoratidzwa paMufananidzo uri pamusoro. MafungirocapacitorsCs (12 capacitors ye750 ηF) inochajwa zvakafanana kuburikidza nekuchaja.resistorsRc (28 kΩ) (yepamusoro-soro inobvumirwa kuchaja voltage 200 kV). Kana iyo yekuchaja voltage yasvika kukosha kunodiwa, kuparara kweiyo spark gap F1 inotangwa neyekunze inokonzeresa pulse. Kana F1 inoputsika, mukana weiyo inotevera nhanho (point B uye C) inokwira. Nekuti iyo yakateedzana resistors Rs ndeye yakaderera-ohmic kukosha kana ichienzaniswa neyekuburitsa resistors Rb (4,5 kΩ) uye yekuchaja resistor Rc, uye sezvo yakaderera-ohmic discharging resistor Ra inoparadzaniswa kubva kudunhu neanobatsira spark-gap Fal. , mutsauko unogona kuitika pane spark-gap F2 inokwira zvakanyanya uye kuparara kweF2 kunotangwa.
Saka spark-gap inokonzerwa nekuputsika mukutevedzana. Nekuda kweizvozvo ma capacitor anoburitswa munhevedzano-yekubatanidza. Iyo yakakwira-ohmic discharge resistors Rb ine dimensioned yekuchinja mafungiro uye yakaderera-ohmic resistors Ra yemheni. Iwo anopikisa Ra akabatanidzwa mukuenderana neanopikisa Rb, apo anobatsira spark-gap anoputsika, nekunonoka kwenguva kwemazana mashoma nano-sekondi.
Urongwa uhwu hunoita kuti jenareta ishande nemazvo.
Iyo wave chimiro uye kukosha kwepamusoro kweiyo impulse voltage inoyerwa nenzira yeImpulse Analyzing System (DIAS 733) iyo yakabatana kunevoltage divider. Iyo voltage inodiwa inowanikwa nekusarudza nhamba yakakodzera yematanho-akabatana matanho uye nekugadzirisa magetsi ekuchaja. Kuti uwane iyo inodiwa yekuburitsa simba parallel kana nhevedzano-yakafanana yekubatanidza jenareta inogona kushandiswa. Muzviitiko izvi mamwe ma capacitors akabatanidzwa mukufanana panguva yekubuda.
Chimiro chinodiwa chekukurudzira chinowanikwa nekusarudzwa kwakakodzera kwemutsara uye kuburitsa resistors yejenereta.
Nguva yekumberi inogona kuverengerwa ingangoita kubva kuequation:
YeR1 >> R2 neCg >> C (15.1)
Tt = .RC123
uye hafu yenguva kusvika pahafu kukosha kubva kuequation
T ≈ 0,7.RC
Mukuita, dunhu rekuyedza rinoyerwa zvinoenderana neruzivo.
Kuita kweImpulse Test
Muedzo unoitwa neyakajairwa mheni impulses ye negative polarity. Nguva yekumberi (T1) uye nguva kusvika hafu-kukosha (T2) inotsanangurwa maererano nechiyero.
Standard mheni impulse
Nguva yekumberi T1 = 1,2 μs ± 30%
Nguva kusvika hafu-kukosha T2 = 50 μs ± 20%
Mukuita, iyo impulse shape inogona kutsauka kubva kune yakajairwa impulse paunenge uchiyedza yakaderera-voltage windings yeakakwira rated simba uye mahwindi epamusoro ekuisa capacitance. Iyo impulse bvunzo inoitwa neasina kunaka polarity voltages kudzivirira irratic flash overs mune yekunze insulation uye test circuit. Kugadziriswa kweWaveform kwakakosha kune akawanda ebvunzo zvinhu. Chiitiko chinowanikwa kubva mumhedzisiro yebvunzo pamayuniti akafanana kana pakupedzisira pre-calculation inogona kupa nhungamiro yekusarudza zvikamu zvewave shaping circuit.
Kutevedzana kweyedzo kunosanganisira imwe referensi impulse (RW) pa75% yeamplitude izere inoteverwa nenhamba yakatsanangurwa yevoltage application pane yakazara amplitude (FW) (maererano neIEC 60076-3 matatu akazara mafungiro). Iyo midziyo yemagetsi uyecurrentchiratidzo chekurekodha chine dhijitari yenguva pfupi rekodhi, yekutarisa, komputa, plotter uye printer. Izvo zvakarekodhwa pamatanho maviri anogona kufananidzwa zvakananga kune kukundikana chiratidzo. Zvekugadzirisa matransformer chikamu chimwe chinoedzwa ne-on-load tap chenger seti yeyakayerwavoltageuye zvimwe zvikamu zviviri zvinoedzwa mune imwe neimwe yenzvimbo dzakanyanyisa.
Kubatana kweImpul Test
Yese dielectric bvunzo tarisa iyo insulation level yebasa. Impulse jenareta inoshandiswa kugadzira zvakatsanangurwavoltageimpulse wave ye 1.2/50 micro seconds wave. Kufungidzira kumwe kwekuderedzwavoltagepakati pe50 kusvika 75% yevoltage yakazara yekuyedza uye mapoinzi matatu anotevera pamagetsi akazara.
Nokuti amatatu phase transformer, kufurira kunoitwa pazvikamu zvese zvitatu zvakatevedzana.
Iyo voltage inoshandiswa pane imwe neimwe yemutsara terminal mukutevedzana, ichichengeta mamwe materminal ari pasi.
Ikozvino uye voltage wave maumbirwo anorekodhwa pane oscilloscope uye chero kukanganisa muchimiro chewave ndiyo nzira yekutadza.
Nguva yekutumira: Zvita-16-2024