Xaiv qhov zoo lub tshuab hluav taws xob diesel tsis yog ib qho teeb meem ntawm kev sib piv tag nrho lub zog xav tau. Txhawm rau kom ua haujlwm ruaj khov, ua haujlwm ntev, thiab cov khoom siv hluav taws xob txhim khu kev qha, engineers yuav tsum ua tib zoo ntsuas cov yam ntxwv ntawm cov khoom sib txuas. Ntau hom kev thauj khoom tuaj yeem cuam tshuam rau lub tshuab hluav taws xob kev ua haujlwm, kev ruaj ntseg voltage, roj efficiency, thiab tag nrho cov kev ntseeg tau.
Kab lus no piav qhia txog yam tseem ceeb uas yuav tsum tau txiav txim siab thaum loj thiab teeb tsa lub tshuab hluav taws xob.
1. Nkag siab hom Load: Linear vs. Nonlinear Loads
Ib qho kev txiav txim siab tseem ceeb tshaj plaws yog hom hluav taws xob thauj khoom txuas nrog lub tshuab hluav taws xob.
Linear Loads
Linear loads tsim tam sim no thiab voltage waveforms uas nyob twj ywm sinusoidal. Cov loads no feem ntau tso qhov kev xav tau ntawm lub tshuab hluav taws xob thiab yooj yim rau kev txhawb nqa.
Common linear loads muaj xws li:
- Teeb pom kev zoo
- Resistance rhaub
- Standard fais motors
- Synchronous motors
- Cov khoom siv hluav taws xob
- Transformers ua haujlwm nyob rau hauv qhov tsis muaj -saturated
Vim hais tias linear loads ua rau me ntsis harmonic distortion, lawv feem ntau muaj me ntsis cuam tshuam rau lub hwj chim zoo.
Nonlinear Loads
Nonlinear loads kos tam sim no hauv pulses es tsis yog cov sinusoidal nthwv dej. Qhov no tsim kev sib haum xeeb sib txawv uas tuaj yeem cuam tshuam tsis zoo rau ob lub tshuab hluav taws xob thiab lwm yam khoom siv txuas nrog.
Tej yam nonlinear loads muaj xws li:
- Thyristor rectifiers
- Variable speed drives (VSDs)
- UPS systems
- roj teeb chargers
- Fluorescent teeb pom kev zoo systems
- Saturated transformers
Cov chaw niaj hnub xws li cov chaw zov me nyuam cov ntaub ntawv, tsev kho mob, chaw nres tsheb sib txuas lus, thiab kev lag luam automation feem ntau muaj feem pua ntawm cov khoom tsis muaj kab.
2. Harmonic Distortion thiab Generator Performance
Nonlinear loads tsim harmonic tam sim no uas distort cov zis waveform ntawm lub tshuab hluav taws xob.
Tej teebmeem muaj xws li:
- Voltage waveform distortion
- Ntxiv lub tshuab hluav taws xob cua sov
- Txo efficiency
- Nce nruab nrab tam sim no
- Tej zaum malfunction ntawm cov khoom siv hluav taws xob rhiab heev
Ib zaug -theem nonlinear loads feem ntau ua rau qhov tseem ceeb thib peb- xaj kom muaj kev sib haum xeeb tam sim no, uas tuaj yeem nce hauv av thiab nruab nrab tam sim no.
Txhawm rau txo qhov sib txawv ntawm qhov sib txawv, ntau lub tshuab hluav taws xob siv hluav taws xob siv a2/3 pitch winding tsim, uas txo qis xoom-ib ntu reactance thiab pab tswj cov kab hluav taws xob huv dua.
3. Load Start Sequence thiab Load Steps
Qhov kev txiav txim uas cov cuab yeej txuas nrog lub tshuab hluav taws xob kuj tseem ceeb heev.
Cov motors loj thiab compressors feem ntau xav tau qhov pib tam sim no uas yog ob peb zaug siab dua lawv cov tam sim no. Yog tias ntau qhov hnyav hnyav pib ib txhij, qhov hluav taws xob ntau dhau yuav tshwm sim.
Cov kev coj ua zoo tshaj plaws suav nrog:
- Pib cov motors loj ib zaug
- Siv cov pib muag muag lossis cov tsav tsheb sib txawv
- Siv cov loads maj mam
- Ua kom muaj peev xwm ntawm lub tshuab hluav taws xob txaus
Kev thauj khoom kom raug zoo pab tswj kev ruaj ntseg voltage thiab tiv thaiv kev ntxhov siab tsis tsim nyog ntawm lub cav thiab alternator.
4. Peb -Phase Load Balancing
Feem ntau cov tshuab hluav taws xob tsim hluav taws xob tsim los rau peb -theem ua haujlwm. Kev faib khoom tsis sib xws ntawm cov theem tuaj yeem tsim teeb meem kev ua haujlwm loj.
Thaum ib qho -theem load txuas nrog peb lub tshuab hluav taws xob -theem tsis muaj qhov sib npaug:
- Phase voltages yuav tsis sib npaug
- Lub cev muaj zog overheating yuav tshwm sim
- Generator efficiency yuav txo qis
- Cov khoom siv rhiab heev tuaj yeem ua rau muaj qhov tsis zoo
Kev lag luam xyaum pom zoo kom tswj tsis tau qhov voltage hauv qab no2%thaum twg los tau.
Yuav kom ua tiav qhov no:
- Faib ib qho -theem loads sib npaug ntawm txhua theem
- Saib xyuas cov theem tam sim no tsis tu ncua
- Xyuas kom tsis muaj theem tshaj nws cov peev xwm tam sim no
5. Kev txiav txim siab txog lub zog
Lub zog tseem ceeb cuam tshuam rau lub tshuab hluav taws xob qhov loj me.
Feem ntau cov generator teeb tau ntsuas ntawm qhov muaj zog ntawm0.8 ua. Loads nrog lub zog tsis zoo yuav tsum muaj ntau dua tam sim no thiab tuaj yeem ua kom muaj peev xwm ntawm lub tshuab hluav taws xob.
Txawm hais tias tsis tshua muaj tshwm sim, cov khoom siv hluav taws xob ua haujlwm tuaj yeem tshwm sim hauv cov tshuab uas muaj peev xwm ntau dhau, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov kev xa hluav taws xob ntev -.
Hauv cov xwm txheej zoo li no:
- Voltage instability yuav tshwm sim
- Generator excitation systems yuav raug cuam tshuam
- Yuav tsum tau them nyiaj ntxiv rau reactors
Ua tib zoo tshuaj xyuas ntawm qhov system fais fab tseem ceeb pab kom muaj kev xaiv lub tshuab hluav taws xob kom raug.
6. Lub tshuab hluav taws xob kub nce thiab qhov hluav taws xob ntau
Kev ua haujlwm ntawm lub tshuab hluav taws xob kuj tseem cuam tshuam los ntawm kev ua haujlwm kub thiab qhov tso zis voltage.
Cov yam ntxwv cuam tshuam rau qhov kub thiab txias muaj xws li:
- Load theem
- Ambient kub
- Qhov cua qhov xwm txheej
- Harmonic cov ntsiab lus
- Qhov siab
Kev kub siab tshaj tuaj yeem txo cov rwb thaiv tsev lub neej thiab ua kom lub tshuab hluav taws xob ua haujlwm luv.
Thaum xaiv lub tshuab hluav taws xob, engineers yuav tsum xyuas:
- Tso cai ntsuas kub nce
- Voltage tswj kev ua tau zoo
- Ntau zaus stability
- Kev ua haujlwm tsis tu ncua
Xaus
Kev xaiv lub tshuab hluav taws xob tsim nyog yuav tsum muaj ntau tshaj li kev suav tag nrho lub zog xav tau. Cov kws ua haujlwm yuav tsum ntsuas cov yam ntxwv ntawm kev thauj khoom, cov ntsiab lus sib haum xeeb, qhov sib npaug ntawm cov khoom siv, cov kev xav tau pib, lub zog muaj zog, thiab kev ua haujlwm kom ntseeg tau tias kev ua tau zoo.
Kev nkag siab txog qhov sib txawv ntawm cov kab thiab cov khoom tsis sib xws, tswj cov theem kom zoo, thiab txiav txim siab txog kev sib haum xeeb tuaj yeem txhim kho lub tshuab hluav taws xob zoo, lub zog zoo, thiab cov khoom siv lifespan.
Rau kev lag luam, kev lag luam, thiab cov ntaub ntawv siv hluav taws xob tseem ceeb, kev tsom xam cov khoom tsim nyog yog qhov tseem ceeb rau kev xaiv lub tshuab hluav taws xob uas xa cov hluav taws xob ruaj khov thiab kev ntseeg siab thaum nws tseem ceeb tshaj plaws.
