Ntchito yachitetezo cha inverter yapamwamba kwambiri

The high voltage inverter ndi AC-DC-AC voltage source inverter yokhala ndi mawonekedwe amitundu yambiri.Imazindikira mawonekedwe a sinusoidal olowetsa, magetsi otulutsa komanso apano kudzera muukadaulo wambiri wa superposition, imawongolera bwino ma harmonics, ndikuchepetsa kuipitsidwa kwa gridi yamagetsi ndi katundu.Pa nthawi yomweyi, ili ndi zida zonse zotetezera komanso njira zotetezerafrequency converter ndi katundu, pofuna kuthetsa ndi kupewa kutayika chifukwa cha zovuta zosiyanasiyana, ndikupanga phindu lalikulu kwa ogwiritsa ntchito.

2. Chitetezo chahigh voltage inverter

2.1 Kutetezedwa kwa mzere wolowera wamagetsi apamwamba kwambiri

Kutetezedwa kwa mzere womwe ukubwera ndi chitetezo cha kumapeto kwa mzere wa wogwiritsa ntchito ndifrequency converter, kuphatikizapo chitetezo cha mphezi, chitetezo chapansi, chitetezo cha gawo, chitetezo cha reverse, chitetezo chosagwirizana, chitetezo cha overvoltage, chitetezo cha transformer ndi zina zotero.Zida zoteteza izi nthawi zambiri zimayikidwa kumapeto kwa inverter, musanayambe kuyendetsa inverter iyenera kuwonetsetsa kuti palibe vuto pachitetezo cha mzere musanayambe kuthamanga.

2.1.1 Chitetezo cha mphezi ndi mtundu wa chitetezo cha mphezi kudzera pa chomangira chomwe chimayikidwa mu kabati yodutsa kapena kumapeto kwa inverter.Chomangirira ndi chipangizo chamagetsi chomwe chimatha kumasula mphezi kapena kumasula mphamvu yamagetsi yamagetsi, kuteteza zida zamagetsi kuti zisawonongeke nthawi yomweyo, ndikudula mphamvu yosalekeza kuti musawononge dongosolo laling'ono.Chomangiracho chimalumikizidwa pakati pa mzere wolowera wa inverter ndi pansi, ndipo chimalumikizidwa mofanana ndi inverter yotetezedwa.Pamene mtengo wa overvoltage ufika pa voteji yomwe ikugwiritsidwa ntchito, womangirira nthawi yomweyo amachitapo kanthu, amadutsa pamtengowo, amachepetsa matalikidwe a overvoltage, ndipo amateteza zida;Vutoli likakhala lachilendo, womangayo amabwereranso kumalo ake kuti awonetsetse kuti dongosololi likuyenda bwino komanso kupewa kuwonongeka chifukwa cha mphezi.

2.1.2 Chitetezo cha pansi ndikuyika chipangizo chosinthira zero-sequence kumapeto kwa inverter.Mfundo yachitetezo chanthawi yotsatizana ndi ziro imachokera palamulo la Kirchhoff, ndipo kuchuluka kwa algebraic zovuta zomwe zikuyenda mu node iliyonse ya dera ndizofanana ndi ziro.Pamene mzere ndi zipangizo zamagetsi zili zachilendo, chiwerengero cha vector cha panopa mu gawo lililonse chimakhala chofanana ndi zero, kotero kuti mphepo yachiwiri ya zero-sequence current transformer ilibe chizindikiro, ndipo actuator sichigwira ntchito.Pakachitika cholakwika china chapansi, kuchuluka kwa vekitala pagawo lililonse sikukhala ziro, ndipo vuto lapano limapangitsa kuti maginito aziyenda pakatikati pa thiransifoma ya zero-sequence current, ndipo kulowetsedwa kwamagetsi kwachiwiri kwa thiransifoma ya zero-sequence current kubwezeredwa ku bokosi lalikulu lowunikira, ndiyeno lamulo lachitetezo limaperekedwa kuti akwaniritse cholinga chokhazikitsa chitetezo cha zolakwika.

2.1.3 Kupanda gawo, reverse phase, unbalance protection, overvoltage protection.Kupanda gawo, reverse gawo, unbalance digiri chitetezo, overvoltage chitetezo makamaka ndi inverter athandizira voteji ndemanga Baibulo kapena voteji thiransifoma kuti mzere voteji kupeza, ndiyeno kudzera CPU bolodi kudziwa ngati ndi kusowa gawo, n'zosiyana gawo, athandizira voteji bwino, kaya overvoltage, chifukwa ngati athandizira gawo, kapena n'zosiyana gawo, ndi voteji kusamvana kapena overvoltage n'zosavuta chifukwa thiransifoma kuwotcha.Kapena mphamvu yamagetsi yawonongeka, kapena injini yasinthidwa.

2.1.4 Chitetezo cha Transformer.Thehigh voltage inverter kokha wapangidwa ndi zigawo zitatu: Transformer nduna, mphamvu unit nduna, ulamuliro nduna zikuchokera, thiransifoma ndi ntchito tangential youma mtundu thiransifoma kutembenuza mkulu-voteji alternating panopa mu mndandanda wa ngodya zosiyanasiyana za otsika voteji magetsi kwa unit mphamvu, thiransifoma imatha utakhazikika ndi kuzirala kwa mpweya, kotero chitetezo cha thiransifoma makamaka kudzera mu thiransifoma chitetezo kutentha, kuteteza thiransifoma kutentha kwambiri, ndi chifukwa thiransifoma koyilo kuwotchedwa.Kufufuza kwa kutentha kumayikidwa mu coil ya magawo atatu a transformer, ndipo mapeto ena a kafukufuku wa kutentha amagwirizanitsidwa ndi chipangizo chowongolera kutentha.Chipangizo chowongolera kutentha chimatha kukhazikitsa kutentha koyambira kwa fan pansi pa thiransifoma, kutentha kwa alamu, ndi kutentha kwaulendo.Nthawi yomweyo, kutentha kwa gawo lililonse la koyilo kumawonetsedwa kangapo.Chidziwitso cha alamu chidzawonetsedwa mu mawonekedwe ogwiritsira ntchito, ndipo PLC idzaopseza kapena chitetezo chaulendo.

2.2 High voltage inverter chotuluka mbali chitetezo

The output line chitetezo chahigh voltage inverter ndi chitetezo cha mbali linanena bungwe la inverter ndi katundu, kuphatikizapo linanena bungwe overvoltage chitetezo, linanena bungwe overcurrent chitetezo, linanena bungwe chitetezo dera lalifupi, galimoto kutenthedwa chitetezo ndi zina zotero.

2.2.1 Kuteteza kwamphamvu kwamagetsi.Chitetezo cha overvoltage chotulutsa chimasonkhanitsa voteji yotuluka kudzera mu voteji sampling board kumbali yotulutsa.Ngati mphamvu yotulutsa ndiyokwera kwambiri, makinawo amadzidzimutsa okha.

2.2.2 Kuteteza Kwanthawi Zonse.Kutetezedwa kopitilira muyeso kumazindikira zomwe zasonkhanitsidwa ndi Hall ndikuzifanizira kuti muwone ngati zimayambitsa kuchulukirachulukira.

2.2.3 Kutetezedwa Kwakanthawi kochepa.Njira zodzitetezera pakuwonongeka kwafupipafupi pakati pa ma stator windings ndi mawaya otsogolera a injini.Ngati inverter itsimikiza kuti zotulutsazo ndi zazifupi, nthawi yomweyo zimatsekereza gawo lamagetsi ndikusiya kuthamanga.