1，Isusulation zvinhu mumunda wemagetsi zvichaparadzwa zvakare nekuda kwesimba rayo rekudzivirira uye kurasikirwa nekuita kwekudzivirira kwekuita, ipapo pachave nekupwanya kwekuputika chiitiko.
Mayero GB4943 uye GB8898 anotemesa magetsi emagetsi, creepage chinhambwe uye insulation yekupinda chinhambwe zvinoenderana nezviripo tsvakiridzo zvawanikwa, asi midhiya iyi inokanganiswa nemamiriro ekunze, Semuyenzaniso, tembiricha, mwando, kudzvanywa kwemhepo, kusvibiswa kwemhepo, nezvimwewo, zvinoderedza simba rekudzivirira kana kukundikana, pakati peiyo mhepo yemhepo ine simba rinonyanya kujeka pakuchenesa magetsi.
Gasi rinogadzira zvidimbu zvakachajiswa nenzira mbiri: imwe ndeyekudhumhana ionization, umo maatomu ari mugasi anodhumhana nezvikamu zvegasi kuti awane simba uye kusvetuka kubva pasi kuenda kune yakakwirira simba.Kana simba iri rikadarika humwe kukosha, maatomu anoiswa ioni kuita maerekitironi akasununguka nemaioni akanaka. Imwe ionisisheni yepasi, umo maerekitironi kana maion anoita panzvimbo yakasimba kuendesa simba rakakwana kumaerekitironi ari panzvimbo yakasimba, kuitira kuti maerekitironi aya. kuwana simba rakakwana, kuitira kuti vapfuure pamusoro pepamusoro pesimba rekudzivirira uye vasiye pamusoro.
Pasi pechiito cheimwe simba remumunda wemagetsi, erekitironi inobhururuka kubva pacathode ichienda kune anode uye ichasangana neiyo ionization munzira.Mushure mekudhumhana kwekutanga nerekitironi yegasi inokonzera ionization, une imwe erekitironi yemahara.Maerekitironi maviri aya anoiswa ionized nekudhumhana paanenge achibhururuka akananga kunodi，Saka tine maerekitironi mana emahara mushure mekudhumhana kwechipiri.Aya maerekitironi mana anodzokorora kudhumhana kumwe chete, izvo zvinogadzira maerekitironi akawanda, zvichiita kuti maerekitironi avhuvhute.
Zvinoenderana nedzidziso yepressure yemhepo, kana tembiricha ikaramba iripo, mweya wemhepo unoenderana neavhareji yemahara sitiroko yemaerekitironi uye huwandu hwegasi.Kana hurefu huchiwedzera uye kudzvanywa kwemhepo kuderera, avhareji yemahara sitiroko yezvimedu zvinochaja inowedzera, iyo inomhanyisa iyo ionization yegasi, saka kuparara kwemagetsi gasi kunoderera.
Hukama huripo pakati pevoltage uye pressure ndeiyi:
Imomo: P-Kutsikirira kwemhepo panguva yekushanda
P0- standard atmospheric pressure
Up-External insulation discharge voltage panzvimbo yekushanda
U0-Discharge voltage yekunze kwekudzivirira pamhepo yakajairwa
n-Characteristic index yekunze insulation discharge voltage ichidzikira nekudzikira kumanikidza
Kana iri saizi yehunhu indekisi n kukosha kweiyo yekunze insulation discharge voltage ichidzikira, hapana data rakajeka parizvino, uye nhamba huru yedata uye bvunzo inodiwa kuti ionekwe, nekuda kwekusiyana kwenzira dzekuyedza, kusanganisira kufanana. yemunda wemagetsi，Kusaenderana kwemamiriro ekunze, kutonga kwekuyerera kureba uye iko machining echokwadi chekushandisa bvunzo kuchakanganisa kurongeka kwebvunzo uye data.
Pazasi barometric pressure, kuparara kwemagetsi kunoderera.Izvi zvinodaro nekuti density yemhepo inodzikira kana dhiri ichidzikira, saka voltage yekuputsika inodonha kusvika mhedzisiro yekudzikira kwemagetsi emagetsi sezvo gasi rinoita basa rakatetepa. breakdown.Hukama huri pakati pekumanikidza kuputsa voltage uye gasi zvinowanzotsanangurwa nemutemo weBashen.
Nekubatsirwa kwemutemo weBaschen uye nhamba huru yezviedzo, kururamisa kukosha kwekuparara kwemagetsi uye gap remagetsi pasi pemamiriro akasiyana-siyana emhepo anowanikwa mushure mekuunganidza data uye kugadzirisa.
Ona Tafura 1 uye Tafura 2
| Air pressure (kPa) | 79.5 | 75 | 70 | 67 | 61.5 | 58.7 | 55 |
| Kugadzirisa kukosha(n) | 0.90 | 0.89 | 0.93 | 0.95 | 0.89 | 0.89 | 0.85 |
Tafura 1 Kugadziriswa kwekuparara kwemagetsi pane akasiyana barometric pressure
| Altitude (m) | Barometric pressure (kPa) | Correction factor (n) |
| 2000 | 80.0 | 1.00 |
| 3000 | 70.0 | 1.14 |
| 4000 | 62.0 | 1.29 |
| 5000 | 54.0 | 1.48 |
| 6000 | 47.0 | 1.70 |
Tafura 2 Kururamisa maitiro emagetsi ekuchenesa pasi pemamiriro akasiyana emhepo
2, Mhedzisiro yekudzvinyirira yakaderera pakukwira kwekushisa kwechigadzirwa.
Zvigadzirwa zvemagetsi mukushanda kwakajairwa zvinoburitsa humwe huwandu hwekupisa, kupisa kunogadzirwa uye musiyano pakati peambient tembiricha unonzi kukwira kwekushisa.Kuwedzera tembiricha kukwira kunogona kukonzera kupisa, moto uye dzimwe njodzi, Naizvozvo, iyo inoenderana muganho kukosha inotarwa muGB4943, GB8898 uye mamwe mazinga ekuchengetedza, nechinangwa chekudzivirira njodzi dzinogona kuitika dzinokonzerwa nekukwira kwekushisa kwakanyanya.
Kuwedzera kwekushisa kwezvigadzirwa zvekupisa kunokonzerwa nekukwirira.Kukwira kwetembiricha kunosiyana zvine mutsetse nekukwirira, uye kutsetseka kweshanduko kunoenderana nechimiro chechigadzirwa, kupisa kwekupisa, tembiricha yepakati uye zvimwe zvinhu.
Kupisa kwekupisa kwezvigadzirwa zvinopisa zvinogona kukamurwa kuita mafomu matatu: kupisa conduction, convection heat dissipation uye thermal radiation.Kupisa kwekupisa kwenhamba yakawanda yezvigadzirwa zvekupisa kunonyanya kuenderana ne convection heat exchange, kureva, kupisa kwezvigadzirwa zvekupisa kunoenderana nenzvimbo yekushisa inogadzirwa nechigadzirwa pachayo kufamba tembiricha yemhepo yakatenderedza chigadzirwa.Pakureba kwe5000m, kupisa kwekutamisa coefficient iri 21% yakaderera pane kukosha pagungwa, uye kupisa kunotamiswa ne convective heat dissipation zvakare 21% yakaderera.Ichasvika 40% pa10,000 metres.Kudzikira kwekutamisa kupisa ne convective heat dissipation kunotungamira mukuwedzera kwekukwira kwekushisa kwechigadzirwa.
Kana kukwirira kunowedzera, mhepo yemhepo inoderera, zvichiita kuti kuwedzera kwehuwandu hwemhepo yemhepo uye kuderera kwekupisa kwekushisa.Izvi zvinodaro nekuti air convective heat transfer ndiko kufambiswa kwesimba kuburikidza nekudhumhana kwema molecular; Nehurefu hunowedzera, mhepo yemuchadenga inodzikira uye density yemhepo inodzikira, zvichikonzera kudzikira kwehuwandu hwemamorekuru emhepo uye zvichikonzera kudzikira kwekutamisa kupisa.
Mukuwedzera, pane chimwe chinhu chinokanganisa kuparara kwekushisa kwekumanikidzwa kuyerera, ndiko kuti, kuderera kwehuwandu hwemhepo huchaperekedzwa nekuderera kwemhepo yemhepo. .Kumanikidza kuyerera kwe convection kupisa kupisa kunoenderana nekuyerera kwemhepo kubvisa kupisa.Kazhinji, feni yekutonhodza inoshandiswa nemota inochengetedza kuyerera kwemhepo ichiyerera kuburikidza nemota isina kuchinjika, Sezvo urefu hunowedzera, kuwanda kwekuyerera kwemhepo kuyerera kunoderera, kunyangwe huwandu hwemhepo hunoramba hwakafanana, nekuti kuwanda kwemhepo kunoderera.Sezvo kupisa chaiko kwemhepo kuchigona kutariswa sekusingaperi pamusoro pemhando yetembiricha inosanganisirwa mumatambudziko akajairika, Kana mafambiro emhepo akawedzera tembiricha imwe chete, kupisa kunotorwa nekuyerera kwakanyanya kudiki kunoderedzwa, zvigadzirwa zvekudziya zvinokanganiswa zvakanyanya. nekuunganidza, uye kukwira kwekushisa kwezvigadzirwa kuchakwira nekuderedzwa kwemhepo yemhepo.
Mhedzisiro yekumanikidza kwemhepo pakukwira kwekushisa kwemuenzaniso, kunyanya pachinhu chekudziya, inotangwa nekuenzanisa chiratidziro uye adapta pasi pekupisa kwakasiyana uye mamiriro ekumanikidza, zvinoenderana nedzidziso yekufurira kwemhepo kudzvanywa pane tembiricha inotsanangurwa pamusoro. Pasi pemamiriro ekudzvinyirira kwakaderera, tembiricha yechinhu chekudziya haisi nyore kupararira nekuda kwekuderedzwa kwehuwandu hwemamorekuru munzvimbo yekutonga, zvichikonzera kupisa kwenzvimbo kukwira zvakanyanya. kudziyisa zvinhu, nekuti kupisa kwezvisiri-kuzvipisa zvinhu kunotamiswa kubva kune inodziya chinhu, saka tembiricha inokwira pakumanikidzwa kwakaderera yakaderera pane yekudziya kwekamuri.
3.Mhedziso
Kuburikidza nekutsvakurudza uye kuedza, mhedziso dzinotevera dzinotorwa.Chekutanga, nekuda kwemutemo weBaschen, kururamisa kukosha kwekuparara kwemagetsi uye gap remagetsi pasi pemamiriro akasiyana emhepo anopfupikiswa kuburikidza nekuyedza.Izvo zviviri zvinoenderana uye zvakabatana; Chechipiri, maererano nechiyero chekukwira kwekushisa kweadapter uye chiratidziro pasi pemamiriro akasiyana-siyana ekumanikidza kwemhepo, kukwira kwekushisa uye simba remhepo rine hukama hwemutsara, uye kuburikidza nekuverenga nhamba, iyo linear equation. yekukwira kwekushisa uye kumanikidzwa kwemhepo muzvikamu zvakasiyana zvinogona kuwanikwa.Tora adapta semuenzaniso, Iyo yekubatanidza coefficient pakati pekukwira kwekushisa uye mhepo yekumanikidza ndeye -0.97 zvinoenderana nenhamba nzira, inova yakanyanya kunaka kuwirirana.Shanduko yekukwira kwetembiricha ndeyekuti tembiricha inokwira ne5-8% pakuwedzera kwe1000m kwega kwega.Naizvozvo, iyi data yebvunzo ndeyekutarisa chete uye ndeyekuongororwa kwemhando.Kuyera chaiko kunodiwa kuti utarise maitiro echigadzirwa panguva yekunyatsoonekwa.
Nguva yekutumira: Kubvumbi-27-2023