Ua ntej, peb yuav tsum txwv qhov kev sib tham kom tsis txhob ua rau nws tsis meej. Lub tshuab hluav taws xob sib tham ntawm no yog hais txog lub tshuab hluav taws xob tsis zoo, peb-theem AC synchronous generator, tom qab ntawd tsuas yog hu ua "generator".
Hom tshuab hluav taws xob no muaj tsawg kawg yog peb qhov tseem ceeb, uas yuav tau hais hauv kev sib tham hauv qab no:
Main generator, muab faib ua lub ntsiab stator thiab lub ntsiab rotor; Lub ntsiab rotor muab ib qho chaw sib nqus, thiab lub ntsiab stator tsim hluav taws xob los muab cov khoom thauj; Exciter, muab faib ua exciter stator thiab rotor; Lub exciter stator muab ib qho chaw sib nqus, lub rotor generates hluav taws xob, thiab tom qab rectification los ntawm lub rotating commutator, nws muab lub zog rau lub ntsiab rotor; Tsis Siv Neeg Voltage Regulator (AVR) pom qhov tso zis hluav taws xob ntawm lub tshuab hluav taws xob tseem ceeb, tswj qhov tam sim no ntawm exciter stator coil, thiab ua tiav lub hom phiaj ntawm stabilizing cov zis voltage ntawm lub ntsiab stator.
Kev piav qhia ntawm AVR voltage stabilization ua haujlwm
Lub hom phiaj ua haujlwm ntawm AVR yog kom muaj lub tshuab hluav taws xob ruaj khov tso zis hluav taws xob, feem ntau hu ua "voltage stabilizer".
Nws txoj haujlwm yog ua kom cov stator tam sim no ntawm lub exciter thaum qhov tso zis hluav taws xob ntawm lub tshuab hluav taws xob qis dua li tus nqi teev, uas yog sib npaug rau qhov ua kom lub zog ntawm lub ntsiab rotor, ua rau lub ntsiab hluav taws xob hluav taws xob nce mus rau tus nqi teev; Ntawm qhov tsis sib xws, txo qhov excitation tam sim no thiab tso cai rau qhov voltage txo; Yog tias qhov tso zis hluav taws xob ntawm lub tshuab hluav taws xob sib npaug ntawm tus nqi teeb tsa, AVR tswj cov zis uas twb muaj lawm yam tsis muaj kev hloov kho.
Tsis tas li ntawd, raws li theem kev sib raug zoo ntawm tam sim no thiab voltage, AC loads tuaj yeem muab faib ua peb pawg:
Resistive load, qhov twg tam sim no nyob rau hauv theem nrog voltage thov rau nws; inductive load, theem ntawm tam sim no lags qab voltage; Capacitive load, theem ntawm tam sim no yog ua ntej ntawm qhov voltage. Kev sib piv ntawm peb cov yam ntxwv ntawm kev thauj khoom pab peb nkag siab zoo dua cov khoom thauj khoom.
Rau cov loads resistive, qhov loj dua load, qhov ntau dua qhov excitation tam sim no yuav tsum tau rau lub ntsiab rotor (kom stabilize cov zis voltage ntawm lub generator).
Hauv kev sib tham tom ntej, peb yuav siv cov excitation tam sim no rau cov loads resistive raws li tus qauv siv, uas txhais tau hais tias qhov loj dua raug xa mus rau qhov loj dua; Peb hu nws me dua nws.
Thaum lub load ntawm lub tshuab hluav taws xob yog inductive, lub ntsiab rotor yuav xav tau ntau dua excitation tam sim no nyob rau hauv kev txiav txim rau lub tshuab hluav taws xob kom tswj tau qhov tso zis voltage.
Capacitive load
Thaum lub tshuab hluav taws xob ntsib lub peev xwm thauj khoom, qhov excitation tam sim no yuav tsum tau los ntawm lub ntsiab rotor yog me dua, uas txhais tau hais tias cov excitation tam sim no yuav tsum tau txo kom stabilize cov zis voltage ntawm lub generator.
Vim li cas qhov no tshwm sim?
Peb tseem yuav tsum nco ntsoov tias tam sim no ntawm lub capacitive load yog ua ntej ntawm qhov hluav taws xob, thiab cov kev coj ua tam sim no (khiav los ntawm lub ntsiab stator) yuav ua rau muaj kev cuam tshuam tam sim no ntawm lub ntsiab rotor, uas tshwm sim tau zoo superimposed nrog lub excitation tam sim no, txhim kho cov hlau nplaum ntawm lub ntsiab rotor. Yog li tam sim no los ntawm exciter yuav tsum tau txo kom muaj kev ruaj ntseg tso zis voltage ntawm lub tshuab hluav taws xob.
Qhov loj dua lub capacitive load, qhov me me qhov tso zis ntawm exciter; Thaum lub capacitive load nce mus rau ib qho twg, cov zis ntawm exciter yuav tsum raug txo kom xoom. Cov zis ntawm exciter yog xoom, uas yog qhov txwv ntawm lub tshuab hluav taws xob; Lub sijhawm no, qhov tso zis hluav taws xob ntawm lub tshuab hluav taws xob yuav tsis ruaj khov rau tus kheej, thiab cov khoom siv hluav taws xob no tsis tsim nyog. Qhov kev txwv no tseem hu ua 'nyob rau hauv excitation limitation'.
Lub tshuab hluav taws xob tsuas tuaj yeem lees txais cov peev txheej thauj khoom tsawg; (Tau kawg, rau lub tshuab hluav taws xob tau teev tseg, kuj tseem muaj kev txwv ntawm qhov loj ntawm cov khoom siv hluav taws xob los yog inductive.)
Yog hais tias ib qhov project muaj teeb meem los ntawm cov loads capacitive, nws muaj peev xwm xaiv los siv IT zog qhov chaw nrog me me capacitance ib kilowatt, los yog siv inductors rau them nyiaj. Tsis txhob cia lub tshuab hluav taws xob teeb tsa ua haujlwm ze ntawm thaj tsam "hauv qab kev txwv".
Post lub sij hawm: Sep-07-2023
