Yuav Ua Li Cas Xaiv Qhov Reactance Rate (K Tus Nqi) Ntawm Lub Siab -voltage Series Reactor Raws li Cov Keeb Kwm Harmonics ntawm Lub Fais Fab?

Nyob rau hauv txoj kev tsheb ciav hlau fais fab mov, kev xaiv ntawm high voltage series resistivity piv raws li kab sib chaws sib haum xeeb keeb kwm yav dhau yuav tsum ua raws li cov hauv qab no kom thiaj li muaj txiaj ntsig zoo cuam tshuam cov pa phem thiab tsis txhob muaj kev pheej hmoo resonance:
I. Lub hauv paus ntsiab lus tseem ceeb: Sib piv cov keeb kwm kev sib raug zoo thiab kev kho qhov system impedance
Harmonic impedance yog inductive
Lub luag haujlwm tseem ceeb ntawm tus resistor yog ua kom tag nrho cov kev sib haum xeeb impedance inductance ntawm capacitor kev twb kev txuas taw tes thiab tsis txhob sib npaug resonance daim phiaj inductive reactance.
Kev Txhaum Cai Tshwj Xeeb Harmonics
Lub reactance ratio yuav tsum tau xaiv raws li lub ntsiab harmonic series nyob rau hauv daim phiaj (xws li . 3}, 5, 7) kom paub meej tias lub capacitor ceg induces lub hom phiaj harmonic thiab tiv thaiv harmonic tam sim no ntws mus rau hauv lub capacitor.
ii. Reactance Ratio (K Tus Nqi) Cov Txheej Txheem Xaiv
1.Thaum lub thib peb harmonic dominates
Pom zoo K-tus nqi: 12% ~ 13%
Muaj nuj nqi: Teem lub resonance taw tes rau 139Hz mus rau 144Hz (peb harmonics hauv qab no 150Hz) kom tsis txhob muaj peb harmonic amplifications.
Case 1: Peb harmonic aberrations nyob rau hauv lub subway substation yog loj heev. Qhov thib peb harmonic voltage amplification tus nqi txo los ntawm 1.21 mus rau 0.50, uas ua tau raws li tus qauv yuav tsum tau.
2.Thaum lub thib tsib harmonic dominates:
Pom zoo K tus nqi: 4.5% ~ 6%
Muaj nuj nqi: kho qhov taw tes resonant rau 204Hz ~ 235Hz (5 harmonics saum 250Hz) thiab suppress 5 harmonics.
Piv txwv 2: 110kV substation nrog 6% reactance zam resonance los ntawm kev txo qhov voltage amplification ntawm 1.0 mus rau 0.69 rau 5 harmonics.
3.Thaum qhov thib peb thiab thib tsib harmonics tshwm sim ib txhij:
Cov lus pom zoo: Hybrid Reactor: Qee lub tsev txhab nyiaj capacitor tau teeb tsa nrog 12% reactance tus nqi (kom txwv qhov thib peb harmonic) thiab qee lub tsev txhab nyiaj tau teeb tsa nrog 4.5% ~ 6% reactance tus nqi (kom txwv qhov thib tsib harmonic).
3. Ib qho Reactor: Yog tias qhov thib peb harmonic cov ntsiab lus qis, xaiv 4.5% 4.5% ~ 6% tus nqi reactance, tuaj yeem cuam tshuam qhov thib tsib harmonic, qhov cuam tshuam rau qhov thib peb harmonic tsawg dua.
Cov ntaub ntawv kawm: Hauv ib lub chaw ua haujlwm substation, qhov thib peb thiab thib tsib kev sib haum xeeb tau tshaj, siv 12% thiab 6% hybrid reactor, txo tag nrho cov kev sib txawv ntawm qhov sib txawv ntawm 4.33% mus rau 3.9%.
4. Thaum tag nrho cov uas yuav tsum tau yog txwv tsis pub khiav
Pom zoo K tus nqi: 0.1% ~ 1%
Muaj nuj nqi: Los tiv thaiv kev hloov khoom siv los ntawm kev txwv qhov tam sim no inrush tam sim no thaum capacitor txuas nrog inductive reactance.
Nco tseg: Tus nqi reactance no tsis cuam tshuam rau kev sib haum xeeb thiab tuaj yeem ua rau peb qhov kev sib haum xeeb.
III. Cov ntsiab lus tseem ceeb
Harmonic Measurement and analysis: Ua ntej xaiv qhov reactance tus nqi, lub harmonic keeb kwm yav dhau ntawm daim phiaj fais fab (xws li, cov ntsiab lus ntawm 3 los yog 5 harmonics) yuav tsum tau txiav txim kom meej los ntawm kev ntsuas teb kom tsis txhob resonances tshwm sim los ntawm deviations ntawm theoretical thiab tswv yim xam.
Tsis txhob hnov ​​​​qab txog kev pheej hmoo: xam qhov sib piv ntawm lub peev xwm capacitor rau reactance tus nqi los xyuas kom meej tias qhov resonance point nyob deb ntawm lub ntsiab harmonic zaus ntawm daim phiaj fais fab.
Piv txwv li, yog tias lub peev xwm muaj peev xwm ze li 5.1% ntawm lub npav luv luv - lub peev xwm ntawm lub voj voog, qhov thib peb - xaj kom muaj kev sib haum xeeb tuaj yeem tshwm sim thaum lub reactance yog 6%.
Dynamic Adjustment and monitoring: Lub orbital traffic load fluctuates ho, xav tau kev saib xyuas ntawm cov qib kev sib haum xeeb thiab kev hloov pauv hloov pauv ntawm cov reactor tsis tau lossis cov tswv yim them nyiaj.
Dynamic nyiaj them yog los daws qhov kev sib tw ntawm complex harmonic spectrum los ntawm kev sib txuas cov lim dej (APF).
Txheem thiab Specification Ua raws: Xyuas kom meej tias cov kev xaiv ntawm reactance ua raws li kev lag luam yuav tsum tau, coj mus rau hauv tus account cov qauv xws li Parallel Capacitor Banks Design Specification (GB50227-2017).