Ua ntej, peb yuav tsum txwv qhov kev sib tham kom tsis txhob ua rau nws tsis meej dhau. Lub tshuab hluav taws xob uas tau tham hauv no yog hais txog lub tshuab hluav taws xob uas tsis muaj txhuam, peb-theem AC synchronous, tom qab no tsuas yog hu ua "generator".
Hom generator no muaj tsawg kawg yog peb qhov tseem ceeb, uas yuav raug hais hauv kev sib tham hauv qab no:
Lub tshuab hluav taws xob tseem ceeb, muab faib ua lub stator tseem ceeb thiab lub rotor tseem ceeb; Lub rotor tseem ceeb muab lub zog sib nqus, thiab lub stator tseem ceeb tsim hluav taws xob los muab lub nra; Exciter, muab faib ua stator exciter thiab rotor; Lub stator exciter muab lub zog sib nqus, lub rotor tsim hluav taws xob, thiab tom qab kho los ntawm lub commutator tig, nws muab lub zog rau lub rotor tseem ceeb; Automatic Voltage Regulator (AVR) ntes tau qhov hluav taws xob tso zis ntawm lub tshuab hluav taws xob tseem ceeb, tswj cov tam sim no ntawm exciter stator coil, thiab ua tiav lub hom phiaj ntawm kev ruaj khov qhov hluav taws xob tso zis ntawm lub stator tseem ceeb.
Kev piav qhia ntawm AVR voltage stabilization ua haujlwm
Lub hom phiaj ua haujlwm ntawm AVR yog kom tswj tau qhov ruaj khov ntawm cov zis hluav taws xob ntawm lub tshuab hluav taws xob, feem ntau hu ua "voltage stabilizer".
Nws txoj haujlwm yog ua kom lub stator tam sim no ntawm lub exciter nce thaum lub zog hluav taws xob ntawm lub generator qis dua qhov teeb tsa tus nqi, uas yog sib npaug rau kev nce lub zog hluav taws xob ntawm lub rotor tseem ceeb, ua rau lub zog hluav taws xob ntawm lub generator tseem ceeb nce mus rau qhov teeb tsa tus nqi; Ntawm qhov tsis sib xws, txo qhov kev txhawb zog tam sim no thiab cia lub zog hluav taws xob txo qis; Yog tias lub zog hluav taws xob ntawm lub generator sib npaug rau qhov teeb tsa tus nqi, AVR tswj cov zis uas twb muaj lawm yam tsis muaj kev hloov kho.
Ntxiv mus, raws li kev sib raug zoo ntawm theem tam sim no thiab voltage, AC loads tuaj yeem muab faib ua peb pawg:
Lub zog tiv taus, qhov twg tam sim no nyob rau hauv theem nrog lub zog hluav taws xob siv rau nws; Lub zog inductive, theem ntawm tam sim no lags tom qab lub zog hluav taws xob; Lub zog capacitive, theem ntawm tam sim no yog ua ntej lub zog hluav taws xob. Kev sib piv ntawm peb yam ntxwv ntawm lub zog thauj khoom pab peb nkag siab zoo dua txog cov khoom thauj capacitive.
Rau cov khoom thauj resistive, qhov loj dua qhov load, qhov loj dua qhov excitation tam sim no xav tau rau lub rotor tseem ceeb (txhawm rau kom ruaj khov qhov tso zis voltage ntawm lub generator).
Hauv kev sib tham tom ntej, peb yuav siv qhov tam sim no uas xav tau rau cov khoom siv resistive ua tus qauv siv, uas txhais tau tias cov loj dua raug xa mus rau qhov loj dua; Peb hu nws me dua nws.
Thaum lub load ntawm lub generator yog inductive, lub rotor tseem ceeb yuav xav tau ntau dua qhov excitation tam sim no kom lub generator tswj tau qhov ruaj khov tso zis voltage.
Kev thauj khoom capacitive
Thaum lub generator ntsib ib qho capacitive load, qhov excitation tam sim no uas lub rotor tseem ceeb xav tau me dua, uas txhais tau tias qhov excitation tam sim no yuav tsum tau txo kom ruaj khov qhov tso zis voltage ntawm lub generator.
Vim li cas qhov no thiaj tshwm sim?
Peb tseem yuav tsum nco ntsoov tias qhov tam sim no ntawm lub capacitive load yog ua ntej ntawm lub voltage, thiab cov tam sim no ua ntej (ntws los ntawm lub stator tseem ceeb) yuav tsim cov tam sim no induced ntawm lub rotor tseem ceeb, uas tshwm sim kom muaj kev sib tshooj zoo nrog lub tam sim no excitation, txhim kho lub magnetic teb ntawm lub rotor tseem ceeb. Yog li ntawd, tam sim no los ntawm lub exciter yuav tsum tau txo kom tswj tau qhov ruaj khov tso zis voltage ntawm lub generator.
Qhov loj dua ntawm lub capacitive load, qhov me dua qhov tso zis ntawm exciter; Thaum lub capacitive load nce mus rau qee qhov, qhov tso zis ntawm exciter yuav tsum raug txo kom xoom. Qhov tso zis ntawm exciter yog xoom, uas yog qhov txwv ntawm lub generator; Ntawm lub sijhawm no, qhov tso zis voltage ntawm lub generator yuav tsis ruaj khov, thiab hom fais fab mov no tsis tsim nyog. Qhov kev txwv no tseem hu ua 'nyob rau hauv kev txwv excitation'.
Lub tshuab hluav taws xob tsuas tuaj yeem lees txais lub peev xwm thauj khoom tsawg xwb; (Tau kawg, rau lub tshuab hluav taws xob tshwj xeeb, kuj muaj kev txwv ntawm qhov loj ntawm cov khoom thauj resistive lossis inductive.)
Yog tias ib qho project muaj teeb meem los ntawm cov khoom siv capacitive, nws muaj peev xwm xaiv siv cov chaw muab hluav taws xob IT nrog cov capacitance me dua ib kilowatt, lossis siv cov inductors rau kev them nyiaj. Tsis txhob cia lub generator teeb tsa ua haujlwm ze ntawm thaj chaw "nyob rau hauv qhov txwv excitation".
Lub sijhawm tshaj tawm: Cuaj hlis-07-2023
