Ng'anjo yapakati yapakati idzapanga ma harmonics ambiri pakagwiritsidwe ntchito.The harmonics osati chifukwa m'deralo kufanana resonance ndi mndandanda resonance mphamvu, komanso kukulitsa zili harmonics ndi kuwotcha capacitor chipukuta misozi zida ndi zipangizo zina.Kuphatikiza apo, kugunda kwapano kumayambitsanso zolakwika pazida zodzitchinjiriza ndi zida zodziwikiratu, zomwe zingayambitse chisokonezo pakuyezera ndikutsimikizira mphamvu yamagetsi.
Kuwonongeka kwa gridi yamagetsi ndizovuta kwambiri.Kunja kwa dongosolo lamagetsi, ma harmonics angayambitse kusokoneza kwakukulu kwa zida zoyankhulirana ndi zida zamagetsi, ndipo ma harmonics ndi owopsa pazida zapakatikati za ng'anjo.Choncho, kuwongolera mphamvu ya ng'anjo yapakati pafupipafupi kwakhala gawo lofunika kwambiri poyankha.
Ng'anjo yapakatikati ya ng'anjo yapakatikati ndiyomwe imapangidwira mphamvu zamagetsi, zomwe zimapanga ma harmonics ambiri apamwamba panthawi yogwira ntchito, yomwe imadziwikanso kuti ma harmonics apakati pafupipafupi.Kulemera kwake kwa harmonic nthawi zambiri kumakhala 5, 7, 11 ndi 13.Kukhalapo kwa kuchuluka kwa ma harmonics apamwamba kungawononge kwambiri chitetezo ndi kayendetsedwe kabwino ka makina opangira magetsi ndi capacitance compensation equipment of the same busway.Transformer ya magawo asanu ndi limodzi imatha kuthana ndi ma harmonics achisanu ndi chisanu ndi chiwiri omwe amapangidwa ndi ng'anjo yapakati pafupipafupi, koma ngati palibe njira zopondereza zofananira, dongosololi lidzakulitsa ma harmonics, limakhudza magwiridwe antchito a thiransifoma, komanso kupangitsa kuti thiransifoma itenthedwe. ndi kuwonongeka.
Chifukwa chake, pakulipirira ma harmonics a ng'anjo yapakatikati yapakatikati, chidwi chiyenera kuperekedwa pakuchotsa ma harmonics, kuti zida zolipirira zisakulitse ma harmonics apamwamba.Pamene mphamvu yapakatikati yonyamula katundu ndi yayikulu, ndizosavuta kuyambitsa ngozi zodumpha kumapeto kwa voteji ya substation ndi kusokoneza kwa mabizinesi pamzerewu.Pamene katundu akusintha, mphamvu zambiri za ng'anjo yamba sizingakwaniritse muyeso wa kampani yathu, ndipo zimalipidwa mwezi uliwonse.
Kumvetsetsa kuopsa kwa ng'anjo zothamanga kwambiri pogwiritsira ntchito ma harmonic control, momwe mungawonetsere kuti zimagwira ntchito bwino komanso moyo wautumiki wa zida, ndikuwongolera bwino.
Choyamba, kufotokozera Mwachidule zachitetezo cha chilengedwe ndi kupulumutsa mphamvu kwa magawo ofananirako ndi mafupipafupi apakati pa ng'anjo yamagetsi:
1. Poyerekeza ndi mndandanda kapena dera lofananira, zomwe zikuchitika panopa zimachepetsedwa kuchokera ku 10 mpaka 12.Itha kupulumutsa 3% yakugwiritsa ntchito mphamvu zamagetsi.
2. Dongosolo lotsatizana silifuna chojambulira chachikulu cha fyuluta, chomwe chingapulumutse 1% ya kugwiritsa ntchito mphamvu.
3. Ng'anjo iliyonse yosungunula induction imayendetsedwa modziyimira payokha ndi gulu la inverters, ndipo palibe chifukwa choyikira ng'anjo yamoto yotentha kwambiri yosinthira, motero kupulumutsa 1% yamagetsi.
4. Pakuti mndandanda inverter magetsi, palibe mphamvu concave mbali mu ntchito mphamvu yokhotakhota khalidwe pamapindikira, ndiko kuti, mbali ya kutaya mphamvu, kotero nthawi yosungunuka kwambiri yafupika, linanena bungwe ndi bwino, mphamvu kupulumutsidwa, ndi chitetezo cha chilengedwe ndi kupulumutsa mphamvu ndi 7%.
Chachiwiri, kubadwa ndi kuvulaza kwa ma harmonics apakati pa ng'anjo yamoto:
1. Parallel intermediate frequency ng'anjo yamagetsi yamagetsi ndiyo gwero lalikulu kwambiri lamagetsi mumagetsi.Nthawi zambiri, ng'anjo yamagetsi yapakati pa 6-pulse imapanga makamaka 6 ndi 7 ma harmonics, pomwe 12-pulse inverter imapanga makamaka 5, 11 ndi 13 ma harmonics.Nthawi zambiri, ma pulses 6 amagwiritsidwa ntchito pamagulu ang'onoang'ono osinthira ndipo 12 pulses amagwiritsidwa ntchito pamagulu akulu osinthira.Mbali yamagetsi yamagetsi yamagetsi awiri a ng'anjo imagwiritsa ntchito njira zosinthira magawo monga kulumikizidwa kwa delta kapena zigzag, ndipo imagwiritsa ntchito kulumikizana kwa mbali ziwiri za nyenyezi kuti apange mphamvu yapakati pa 24-pulse kuti achepetse kukhudzidwa kwa ma harmonics. gridi yamagetsi.
2. Mng'anjo yapakatikati yopangira ng'anjo idzapanga ma harmonics ambiri pakagwiritsidwe ntchito, zomwe zidzadzetsa kuwonongeka kwakukulu kwa harmonic ku gridi yamagetsi.Ma Harmonics amachepetsa kutumiza ndi kugwiritsa ntchito mphamvu yamagetsi, amapangitsa kuti zida zamagetsi zizitenthedwa, zimayambitsa kugwedezeka ndi phokoso, zimasokoneza gawo lotsekera, kufupikitsa moyo wautumiki, ngakhale kuyambitsa kulephera kapena kuyaka.Ma Harmonics apangitsa kuti ma resonance am'deralo kapena kufanana kwamagetsi pamagetsi, zomwe ziwonjezere zomwe zili mu harmonic ndikupangitsa kuti zida zolipirira capacitor ndi zida zina zipse.
Pamene chiwongola dzanja chokhazikika sichingagwiritsidwe ntchito, chilango chamagetsi chokhazikika chidzachitika, zomwe zimapangitsa kuti ndalama zowonjezera magetsi ziwonjezeke.Kuthamanga kwaposachedwa kumatha kuyambitsanso zolakwika pazida zodzitchinjiriza ndi zida zodziwikiratu, zomwe zingayambitse chisokonezo pakuyezera ndikutsimikizira mphamvu yamagetsi.Kunja kwa makina opangira magetsi, ma pulse pakali pano akhudza kwambiri zida zoyankhulirana ndi zinthu zamagetsi, kotero kuwongolera mphamvu ya ng'anjo yapakatikati ya ng'anjo yapakatikati kwakhala chinthu chofunikira kwambiri.
Nthawi yotumiza: Apr-12-2023