Ndeapi minda yeUPS magetsi anoshandiswa zvakanyanya?
UPS simba rekupa system midziyo ndiyo yekutanga mhando yemidziyo yeruzivo, inonyanya kushandiswa mukuchengetedza kuchengetedzwa kwemakomputa ruzivo masisitimu, masisitimu ekutaurirana, mobile data network nzvimbo, nezvimwe. cheni, aerospace indasitiri cheni, etc. Sechinhu chakakosha cheperipheral midziyo yekombuta yeruzivo system, hurongwa hwekutaurirana uye data network centre, simba risingachinjiki rinoita basa rakakosha mukuchengetedza data rekombuta, kuve nechokwadi kugadzikana kwemagetsi grid voltage uye frequency, kuvandudza kunaka kwegedhi remagetsi, uye kudzivirira kutadza kwesimba pakarepo uye kukundikana kwesimba kusingatarisirwi kubva mukukuvadza vashandisi.basa.
Rudzi rwechipiri rwemagetsi emagetsi eUPS simba rekushandisa system rinonyanya kushandiswa muminda yemagetsi, simbi, isiri-ferrous simbi, marasha, petrochemical, kuvaka, mushonga, mota, chikafu, mauto uye mamwe minda muindasitiri yemagetsi emagetsi indasitiri. , kuona kuti ese magetsi otomatiki maindasitiri system midziyo, kure Kuvimbika kweindasitiri otomatiki magetsi emagetsi eAC uye DC isingachinjiki magetsi emagetsi emagetsi senge Executive system midziyo, yakakwira-voltage circuit breaker connection, relay protection, automatic devices, uye zviratidzo zvekushandisa.Indasitiri-giredhi isingachinjiki magetsi emagetsi zvigadzirwa zvepamusoro-soro pakati pezvisingapindike magetsi emagetsi.Inosanganisira tekinoroji yemagetsi emagetsi epamusoro-simba (zvichida megawati-level) shanduko yesimba, dhijitari control system, AC series redundancy tekinoroji, inoshanda pulse ikozvino kudzvinyirira tekinoroji, yakakwirira-simba chigadzirwa tekinoroji yekugadzira, etc. Zviri pachena, makambani emagetsi akajairika haakwanise kupinda. indasitiri iyi.Makambani chete ane epamusoro-simba magetsi emagetsi tekinoroji uye akatevedzana ekugadzirwa kwechigadzirwa, kugadzira uye masevhisi masimba, uye akaunganidzwa anoenderana kugadzirwa kwemaindasitiri uye ruzivo rwekushandisa, anogona kuita basa rakanaka mukugadzira maindasitiri asingapindiki magetsi ekupa masisitimu, Kugadzira uye kutengesa kwemusika. masevhisi.
Parizvino, kune zvirongwa zvina zvehukuru-hukuru UPS yekuisa harmonic ikozvino kudzvinyirira
chirongwa 1.
6-pulse UPS + active high-order harmonic sefa, inopinza ikozvino yakakwirira-odha harmonics <5% (yakayerwa mutoro), yekuisa simba chinhu 0.95.Urongwa uhwu hunoita kuti chiratidzo chekupinza ive chakanaka, asi tekinoroji yayo haina kukura, uye kune matambudziko akadai semuripo wekukanganisa, kuwandisa, nezvimwe, izvo zvinokonzeresa sekudonha kwenhema kana kukuvadzwa kweiyo main switch switch.Izvo zvinokanganisa zveTHM zvinoshanda harmonic sefa tekinoroji zvakajairika
a) Pane dambudziko re "kubhadhara kwenhema": nokuti kukurumidza kupindura kwemubhadharo kunodarika 40ms, kune ngozi inogona kuchengetedzwa ye "kubhadhara kwenhema".Semuyenzaniso, kana uchiita mabasa ekucheka/kutuma pamagetsi ekuisa, kana kuita mabasa anorema ekucheka/kukomisheni kumativi ekumusoro nekudzika kweiyo UPS yekupinda, zviri nyore kukonzera "kutsauka muripo".Chiedza chakauya, zvichikonzera "kuchinja kamwe kamwe" muups power input harmonic current.Kana zvanyanya kukomba, zvinokonzeresa "kunyepa kukwenya" kweiyo UPS yekuisa switch.
b) Kuvimbika kwakaderera: Kune iyo isingachinjiki simba rekupa ne6 pulses + inoshanda sefa, chiyero chekutadza chakakwira, nekuti iyo power drive chubhu yeinogadzirisa uye inoshandura iIGBT chubhu.Pane zvinopesana, kune gumi nemaviri-pulse + passive sefa UPS, yakavimbika inductors uye capacitors anoshandiswa mumasefa ayo.
c) Deredza mashandiro ehurongwa uye wedzera mutengo wekushandisa: mashandiro ehurongwa hwemasefa anoshanda angangoita 93%.Mune 400KVA UPS parallel yekubatanidza, pasi pemamiriro ekuchaja kwakazara uye 33% yekuisa yakakwirira-odha harmonic ikozvino muripo, kana muripo wemagetsi uchibhadharwa pa 0.8 yuan pa KW*hr=, mari yekushandisa yakabhadharwa mukati megore rimwe ndeiyi inotevera.
400KVA*0.07/3=9.3KVA;kushandiswa kwemagetsi pagore i65407KW.Hr, uye mari yemagetsi yakawedzerwa i65407X0.8 yuan=52,000 yuan.
d) Kuwedzera sefa inoshanda kunodhura zvakanyanya: iyo yekuisa yezita ikozvino yeanoshanda sefa 200 kVA UPS ndeye 303 amps;
Harmonic ikozvino fungidziro: 0.33 * 303A = 100A,
Kana iyo yekupinda harmonic yazvino yemukati isingasviki 5%, muripo wezvino unofanirwa kuverengerwa sezvishoma: 100A;
Actual Configuration: Seti ye100 amp inoshanda mafirita.Zvinoenderana nefungidziro iripo ye1500-2000 yuan yeampere, mutengo wakazara uchawedzera ne150,000-200,000 yuan, uye mutengo we6-pulse 200KVA UPS uchawedzera ne60% -80%.
Scenario 2
Adopt 6-pulse isingapindiki magetsi ekupa + 5th harmonic sefa.Kana iyo isingachinjiki yemagetsi ekugadzirisa magetsi iri matatu-chikamu-yakanyatsodzora zambuko-mhando 6-pulse rectifier, iyo harmonics inogadzirwa neakaunzi yekudzoreredza inoda kusvika 25-33% yezvose harmonics, uye mushure mekuwedzera 5th harmonic sefa, iyo harmonics ndeye. yakaderedzwa kusvika pasi pe10%.Iyo yekupinza simba chinhu ndeye 0.9, iyo inogona kuderedza zvishoma kukuvadza kweharmonic ikozvino kune grid yemagetsi.Nekumisikidzwa uku, iyo yekupinza yazvino harmonics ichiri yakakura, uye jenareta reshiyo inodiwa kuti ive yakakura kupfuura 1: 2, uye kune njodzi yakavanzika yekuwedzera kusingaite mukubuda kwejenareta.
Sarudzo 3
Iyo yekunyepedzera gumi-kupuruzira chirongwa uchishandisa nhanho-inoshandura shanduko + 6-pulse rectifier inoumbwa neaviri 6-pulse rectifier ups:
a) Yakajairwa 6-pulse rectifier
b) A phase-shifted 30-degree transformer + 6-pulse rectifier
Yakagadzirirwa fake 12-pulse rectifier UPS.Pamusoro, maharmonics emutoro wakazara wekuisa ikozvino unoratidzika kunge 10%.Iyi gadziriso ine yakakomba imwe pfungwa yekutadza.Kana iyo isingapindiki magetsi inotadza, iyo yekupinda harmonic ikozvino yehurongwa inowedzera zvakanyanya, ichiisa mungozi kuchengetedzeka kwesimba rekupa simba.
Zvakanyanya kuipa:
1).Kucheka makona uye zvinhu zvechigadzirwa chepakutanga, seti yese yemidziyo haipo.
2).Kana iyo rectifier yeUPS ikatadza, inoshandurwa kuita 6-pulse UPS, uye harmonic yemukati ichawedzera zvakanyanya.
3).Uye kutonga kweDC bhasi mutsetse ndeye yakavhurika-loop control system.Ikozvino kugovera kugovera hakugone kunyatso kunaka.Iyo harmonic ikozvino pamutoro wakareruka icharamba yakakura kwazvo.
4).Kuwedzera sisitimu kuchave kwakaoma zvakanyanya
5).Iyo phase-shifting transformer yakaiswa haisi iyo yepakutanga chigadzirwa, uye mechi ine yekutanga system haizove yakanaka.
6).Nzvimbo yepasi ichava yakakura
7).Kuita kuri 12-15%, iyo isina kunaka se12-pulse UPS.
Sarudzo 4
Adopt 12-pulse isingapindiki magetsi ekupa + 11-odha harmonic sefa.Kana iyo isingapindiki magetsi ekugadzirisa magetsi iri matatu-chikamu-yakanyatsodzora zambuko-mhando 12-pulse rectifier, mushure mekuwedzera 11th-odha harmonic sefa, inogona kudzikiswa kusvika pazasi 4.5%, iyo inogona kubvisa zvachose kukuvadza kweharmonic. zvazvino zvirimo kune gidhi remagetsi, uye mutengo wechiyero ndeye Iyo sosi sefa yakaderera zvakanyanya.
12-pulse UPS + 11th harmonic sefa inotambirwa, iyo yekupinda yazvino harmonic i4.5% (yakayerwa mutoro), uye yekupinza simba chinhu 0.95.Iyi mhando yekumisikidza ndiyo yakakwana uye yakavimbika mhinduro yeUPS magetsi indasitiri, uye inoda huwandu hwejenareta hwe1: 1.4.
Zvichienderana nekuongorora kuri pamusoro apa, chirongwa chekubvisa harmonic che12-pulse rectifier + 11th-order harmonic sefa ine mashandiro akanaka, kuvimbika kwepamusoro, kuita kwakagadzikana uye kwakavimbika, uye kuita kwakanaka kwemutengo kunokurudzirwa mukuita.
Nguva yekutumira: Kubvumbi-13-2023