1. Umthombo wolawulo lweharmonic
Igama elithi i-pulse current liqale ngohlalutyo lwemathematika ye-pulse yangoku enxulumene nemathiriyeli ye-acoustic.Iye yaseka isiseko esihle ngenkulungwane ye-18 neye-19.UFourier et al.indululwe ngokucacileyo indlela yohlalutyo lwe-harmonic, esasetyenziswa ngokubanzi kwiinkqubo zokubonelela ngombane.Ingxaki ye-pulse current ikwinkulungwane yama-20.Ixesha kunye nee-1930 zatsalela ingqalelo yomntu wonke.Ngelo xesha, ukusebenzisa kweFransi iziguquli zemercury arc ezimileyo zabangela utshintsho lwamaza kumbane kunye nangoku.Ngo-1945, i-JCRead yapapasha i-converter pulse currents ezinxulumeneyo.Ngeminyaka yee-1950 kunye nee-1960, ngenxa yophuhliso lwetekhnoloji yothumelo lwe-voltage ngqo yangoku, abaguquleli abanxulumeneyo bakhululwa, nto leyo ebangele iingxaki ezininzi ze-pulse ngoku kwinkqubo yonikezelo lombane.Ukusukela ngeminyaka yee-1970, ngenxa yophuhliso olukhawulezayo lwetekhnoloji ye-elektroniki yamandla, izixhobo zombane ezahlukeneyo zombane Inkqubo yonikezelo lwamandla, ukuveliswa kwamashishini, ukuthutha kunye nokusetyenziswa kwekhaya kuya kuxhaphaka ngakumbi.Imiphumo emibi ye-pulse currents iya isiba nzima ngakumbi.Ehlabathini lonke baye banikela ingqalelo eyaneleyo kwingxaki ye-pulse yangoku.Ziliqela iinkomfa zemfundo ezingeengxaki zangoku eziye zabanjwa kumazwe ngamazwe.Onke amaziko ophando aphambili aqulunqe imigaqo kunye neemfuno zokunciphisa i-pulse current yenkqubo yobonelelo lwamandla kunye nezixhobo zokusetyenziswa kwamandla.Izixhobo zombane zigqithisekile, zibangela ukungcangcazela kunye nengxolo, kwaye zenza umaleko wokugquma ube brittle.Ubomi benkonzo bufutshane, kunye neempazamo okanye umonakalo.I-pulse yangoku ibangela ukuba inxalenye yenkqubo yonikezelo lwamandla ihlaziywe ngokulandelelana okanye ngokuhambelanayo.Iya kubangela ukuba isixhobo sokhuselo lombane kunye nesixhobo sokhuselo singasebenzi kakuhle, senze umlinganiso wamandla ombane kunye nokuqinisekiswa kungahambi kakuhle, kwaye i-pulse yangaphandle yangoku yenkqubo yonikezelo lombane iya kubangela ukuphazamiseka okukhulu kwizixhobo zonxibelelwano kunye neemveliso zombane.
Uyilawula njani i-pulse current?Ngokukodwa kwinkalo yokutshintsha ukunikezelwa kwamandla kunye nokugcinwa kweemoto, kunye nokuphuculwa kwe-automation control automation, ukukhuselwa kwendalo kunye nokugcinwa kwamandla, ukugcinwa kwamandla kunye nemigaqo-nkqubo yokunciphisa ukukhutshwa, iimoto azifane zidibaniswe ngokuthe ngqo kwigridi yamandla kwaye zisetyenziswe ngokuthe ngqo.Ngokuqhelekileyo, ziqhutywa ngabaqalisi abathambileyo.I-inverter inokulawula ngokuguquguqukayo amandla okuphuma kunye nomlinganiselo wesantya semoto, ukuhlangabezana neemfuno zomsebenzi, kwaye ineempembelelo eziphawulekayo ekukhuselweni kwendalo kunye nokonga amandla.Njengoko wonke umntu uyazi, i-soft starter ibangele ingxaki ye-harmonic yangoku kwigridi yamandla.Zonke iinkampani zamandla azivumeli abathengi ukuba bazise ngokugqithisileyo i-harmonic yangoku kwigridi yamandla.Abathengi banyanzelekile ukuba baphelise i-harmonic current ebangelwa yi-soft starter.Ngesiqalo esithambileyo Ukusetyenziswa okubanzi kunye nokukhuselwa kweenjini, i-MTE ibandakanya ii-reactors series, i-reactors output, i-dv / dt filters kunye nezinye iimveliso, uyilo olulodwa lwe-dV Sentry lubonelela ngokhuseleko olungcono lwecala lomthwalo, ukuvumela ii-motor ze-AC, iintambo kunye neziqalisi ezithambileyo zikhuselwe. ukusuka kwi-spikes yamandla ombane osebenzayo kunye nokuphazamiseka kwimowudi yokusebenza eqhelekileyo.
Isihluzi esenziwe kakuhle sidibanisa malunga ne-50% yokunciphisa imodi eqhelekileyo, ukukhuselwa kwamandla entlambo kunye nokunciphisa ixesha lokunyuka.
2. Ulawulo lweHarmonic lugcina injongo yokugcina amandla kunye nokufaneleka
Musa ukucinga ukuba ubukho be-pulse current buya kuchaphazela kuphela umgangatho wamandla wegridi yamandla.Enyanisweni, ikwanxulumene nokusetyenziswa kwamandla kunye nenqanaba lamanzi kunye nombane.Ngamanye amazwi, ukuba i-harmonic yangoku kwinkqubo yegridi yamandla inokupheliswa, iya kunceda ukugcina injongo yokugcina umbane.
Ngokuphuculwa kwemimiselo kazwelonke yokugcina amandla kunye nokunciphisa ukukhutshwa kwamandla, amanyathelo ahlukeneyo okugcina amandla aya kwamkelwa yizixeko ezikhulu, kwaye ulawulo lwe-harmonic luya kuba yinto efanelekileyo kakhulu yokuphumelela.
Nangona ukuphunyezwa kolawulo lwe-harmonic ubukhulu becala kukuphucula umgangatho wamandla, kodwa ukuqinisekisa ukusetyenziswa okuqhelekileyo kwezixhobo, kodwa ngokuphuculwa ngokuthe ngcembe kwethekhinoloji, akukho nto imbi kakhulu ukuyisebenzisa njengenye yamanyathelo okugcina ukonga amandla. isiphumo esinokwenzeka.
Ngokuqhelekileyo kukho iindlela ezimbini zokufezekisa injongo yokonga umbane, enye kukunciphisa umsebenzi ongafunekiyo wamandla, kwaye enye kukuphucula ukusebenza kakuhle komsebenzi wamandla.
Imisinga ye-Harmonic inokubangela i-cascade yomonakalo, enye yazo isiphumo samandla achithwayo, okanye ilahleko yobushushu kwisekethe.Ezi lahleko zobushushu zibonakaliswa kumandla asebenzayo emitha yombane yesigaba esinye.Ukuba ukulahleka kwe-harmonic current kumgca kungancitshiswa, injongo yokugcina umbane inokufezekiswa.
Kodwa kuthekani ngomphumo wokwenene womsebenzi othile?Ngokubhekiselele kwindlela yokulawula i-harmonic yangoku, ukhetho oluphambili sisihluzo esisebenzayo kunye ne-notch yamandla esekethe uhlobo lokucoca.Olu hlobo lokucoca lufakwe kuthotho kumgca, kwaye isiphumo esifunyenweyo asilungile kakhulu.
Ngokwahlukileyo, umphumo wolawulo lwe-harmonic kwi-pulse yangoku yomthombo womthwalo uya kuba yinto efanelekileyo.Ukuba i-pulse current filter ifakwe kumthwalo ngamnye womthombo wangoku we-pulse, kungekhona nje kuphela ukuba isiphumo esihle sokugcina amandla sifunyenwe, kodwa sinokuqinisekisa umgangatho wothungelwano lwangaphakathi lwamandla enkampani, oluyisicwangciso solu khuthazo.
Ixesha lokuposa: Apr-13-2023