Xaiv qhov raug load configuration yog ib qho tseem ceeb tshaj plaws nyob rau hauv diesel generator system tsim. Kev sib txuam tsis zoo yuav ua rau muaj qhov tsis txaus ntseeg, overheating, harmonic distortion, txo efficiency, lossis txawm tias cov khoom tsis ua haujlwm.
Ua ntej xaiv lossis ua haujlwm lub tshuab hluav taws xob teeb tsa, cov neeg siv yuav tsum ua tib zoo ntsuas cov hom kev thauj khoom, qhov sib npaug ntawm qhov pib, cov yam ntxwv ntawm qhov hluav taws xob, thiab cov teebmeem kev sib haum xeeb.
Vim li cas Load Analysis Matters rau Generator Sets
Cov khoom siv hluav taws xob yog tsim los muab cov hluav taws xob ruaj khov nyob rau hauv cov haujlwm sib txawv. Txawm li cas los xij, cov khoom siv hluav taws xob sib txawv tsim cov yam ntxwv sib txawv.
Kev txheeb xyuas kom raug load pab:
- Txhim kho lub tshuab hluav taws xob kev ntseeg tau
- Tiv thaiv kom tsis txhob muaj hluav taws xob hloov pauv
- Txo cov kev pheej hmoo overheating
- Tiv thaiv cov cuab yeej rhiab heev
- Txuas lub tshuab hluav taws xob kev pab cuam lub neej
1. Linear Loads
Linear loads yog loads qhov twg tam sim no thiab voltage waveforms nyob twj ywm sinusoidal tom qab txuas nrog lub hwj chim system.
Cov loads no kuj ruaj khov thiab feem ntau yooj yim dua rau cov tshuab hluav taws xob los txhawb nqa.
Common Linear Loads
-
Lub teeb incandescent
- Resistance rhaub
- Standard fais motors
- Synchronous motors
- Cov khoom siv hluav taws xob
- Transformers ua haujlwm nyob rau hauv tsis yog -saturated tej yam kev mob
Cov yam ntxwv ntawm Linear Loads
Linear loads feem ntau:
- Ua kom tsawg tsawg harmonic distortion
- Ua kom ruaj khov zog yam ntxwv
- Ua kom tsis tshua muaj kev ntxhov siab ntawm lub tshuab hluav taws xob alternator
Rau feem ntau cov ntawv thov kev lag luam, cov kab hluav taws xob yog suav tias yog lub tshuab hluav taws xob- tus phooj ywg.
2. Nonlinear Loads
Nonlinear loads tsim tsis yog -sinusoidal tam sim no thiab voltage waveforms. Cov loads no tuaj yeem tsim kev sib haum xeeb uas cuam tshuam rau lub tshuab hluav taws xob thiab lwm yam khoom siv hluav taws xob.
Common Nonlinear Loads
- Thyristor rectifiers
- Variable speed drives (VSD/VFD)
- UPS systems
- roj teeb chargers
- Fluorescent teeb pom kev zoo systems
- Saturated transformers
Harmonic cuam tshuam ntawm Nonlinear Loads
Nonlinear loads tsim kom muaj kev sib haum xeeb uas yuav ua rau:
- Voltage waveform distortion
- Generator overheating
- Nce nruab nrab tam sim no
- Txo alternator efficiency
- Kev cuam tshuam nrog cov khoom siv rhiab
Ib zaug -theem nonlinear loads feem ntau tsim cov kev sib raug zoo thib peb, uas tuaj yeem ua rau muaj kev ntxhov siab hauv av tam sim no thiab nruab nrab tus neeg xyuas pib.
Qhov tseem ceeb ntawm 2/3 Pitch Alternators
Muaj ntau lub tshuab hluav taws xob niaj hnub siv2/3 pitch alternator windingskom txo harmonic distortion.
Qhov zoo ntawm 2/3 Pitch Design
- Tsawg xoom-qib reactance
- Txo qhov thib peb harmonic voltage distortion
- Txhim kho cov zis waveform zoo
- Zoo dua compatibility nrog nonlinear loads
Qhov kev tsim no tseem ceeb tshwj xeeb tshaj yog rau cov tshuab hluav taws xob siv hluav taws xob UPS, cov chaw khaws ntaub ntawv, thiab cov khoom siv hluav taws xob.
3. Load Start Sequence thiab cov kauj ruam
Cov motors loj thiab cov khoom siv inductive yuav xav tau siab pib tam sim no thaum pib.
Yog tias ntau qhov hnyav pib ib txhij, lub tshuab hluav taws xob yuav ntsib:
- Sudden voltage poob
- Kev hloov pauv ntau zaus
- Cav overload
Pom zoo xyaum
- Pib loj loads ib kauj ruam
- Ua ntej qhov tseem ceeb loads ua ntej
- Siv cov pib muag muag lossis cov tsav tsheb sib txawv thaum tsim nyog
Kev thauj khoom kom raug zoo txhim kho lub tshuab hluav taws xob ruaj khov thiab txo cov kev ntxhov siab pib.
4. Peb -Theem Load Balance
Rau peb -theem generator systems, load tshuav ntawm theem yog qhov tseem ceeb heev.
Kev pheej hmoo ntawm Unbalanced Loads
Thaum ib zaug -phase loads tsis sib npaug:
- Peb -theem voltage imbalance tshwm sim
- Motors yuav overheat
- Cov zis efficiency txo
- Cov khoom siv rhiab heev yuav raug cuam tshuam
Yog hais tias voltage imbalance ntau tshaj2%, qee yam khoom siv yuav ua haujlwm txawv txav.
Kev pom zoo
Xyuas kom meej tias:
- Ib zaug -theem loads raug faib sib npaug
- Tam sim no ntawm txhua theem tseem nyob hauv cov kev txwv ntsuas
Sib npaug loading txhim kho lub tshuab hluav taws xob efficiency thiab kev ua haujlwm kev ntseeg siab.
5. Lub zog ua haujlwm Loads
Feem ntau cov generator teeb yog tsim los rau kev lag luam fais fab loads. Txawm li cas los xij, qee cov ntawv thov tuaj yeem tsim ua lub zog muaj zog.
Tej Yam Ua
- Ntev -kab kis tau tus mob
- Capacitive loads
- Fais fab Factor kho capacitor
Kev siv zog ntau dhau tuaj yeem ua rau:
- Voltage instability
- Alternator excitation teeb meem
Qee qhov xwm txheej, ntxiv cov nyiaj them rov qab tuaj yeem pab txhim kho qhov system.
6. Lub tshuab hluav taws xob kub nce thiab qhov hluav taws xob ntau
Load tej yam kev mob ncaj qha cuam tshuam lub tshuab hluav taws xob kub nce thiab tso zis voltage stability.
Thaum loads tshaj qhov txwv tsim, generators tej zaum yuav ntsib:
- Tshaj winding kub
- Txo rwb thaiv tsev lub neej
- Voltage fluctuation
- Txo cov cuab yeej siv lub neej
Kev tsim lub tshuab hluav taws xob kom zoo yog qhov tseem ceeb los tswj kom muaj kev nyab xeeb ntawm kev ua haujlwm kub thiab cov zis hluav taws xob ruaj khov.
Xaus
Nkag siab txog cov yam ntxwv ntawm lub tshuab hluav taws xob thauj khoom yog qhov tseem ceeb rau kev xaiv lub tshuab hluav taws xob zoo li qub thiab ua kom ntseeg tau ntev - lub sijhawm ua haujlwm ruaj khov.
Los ntawm ua tib zoo soj ntsuam cov kab thiab cov kab tsis sib luag, qhov sib npaug ntawm cov khoom sib npaug, cov teebmeem kev sib haum xeeb, cov kev xav tau pib, thiab cov khoom siv hluav taws xob, cov neeg siv tuaj yeem txhim kho lub zog zoo, tiv thaiv cov khoom siv, thiab txuas ntxiv lub tshuab hluav taws xob.
Rau txoj kev lag luam lossis kev siv hluav taws xob, kev tshawb xyuas kev lag luam thiab lub tshuab hluav taws xob sib txuam tau pom zoo.
